documentation: avoid links to 'master' branch from 3.4 maintenance branch

doc/py_tutorials/py_ml/py_svm/py_svm_opencv/py_svm_opencv.markdown

@@ -36,7 +36,7 @@ gives us a feature vector containing 64 values. This is the feature vector we us
 
 Finally, as in the previous case, we start by splitting our big dataset into individual cells. For
 every digit, 250 cells are reserved for training data and remaining 250 data is reserved for
-testing. Full code is given below, you also can download it from [here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/ml/py_svm_opencv/hogsvm.py):
+testing. Full code is given below, you also can download it from [here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/ml/py_svm_opencv/hogsvm.py):
 
 @include samples/python/tutorial_code/ml/py_svm_opencv/hogsvm.py
 

doc/tutorials/calib3d/camera_calibration/camera_calibration.markdown

@@ -77,13 +77,13 @@ Source code
 
 You may also find the source code in the `samples/cpp/tutorial_code/calib3d/camera_calibration/`
 folder of the OpenCV source library or [download it from here
-](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/calib3d/camera_calibration/camera_calibration.cpp). The program has a
+](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/calib3d/camera_calibration/camera_calibration.cpp). The program has a
 single argument: the name of its configuration file. If none is given then it will try to open the
 one named "default.xml". [Here's a sample configuration file
-](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/calib3d/camera_calibration/in_VID5.xml) in XML format. In the
+](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/calib3d/camera_calibration/in_VID5.xml) in XML format. In the
 configuration file you may choose to use camera as an input, a video file or an image list. If you
 opt for the last one, you will need to create a configuration file where you enumerate the images to
-use. Here's [an example of this ](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/calib3d/camera_calibration/VID5.xml).
+use. Here's [an example of this ](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/calib3d/camera_calibration/VID5.xml).
 The important part to remember is that the images need to be specified using the absolute path or
 the relative one from your application's working directory. You may find all this in the samples
 directory mentioned above.

doc/tutorials/core/file_input_output_with_xml_yml/file_input_output_with_xml_yml.markdown

@@ -16,7 +16,7 @@ Source code
 -----------
 
 You can [download this from here
-](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/core/file_input_output/file_input_output.cpp) or find it in the
+](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/core/file_input_output/file_input_output.cpp) or find it in the
 `samples/cpp/tutorial_code/core/file_input_output/file_input_output.cpp` of the OpenCV source code
 library.
 

doc/tutorials/core/how_to_scan_images/how_to_scan_images.markdown

@@ -51,7 +51,7 @@ three major ways of going through an image pixel by pixel. To make things a litt
 will make the scanning for each image using all of these methods, and print out how long it took.
 
 You can download the full source code [here
-](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/core/how_to_scan_images/how_to_scan_images.cpp) or look it up in
+](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/core/how_to_scan_images/how_to_scan_images.cpp) or look it up in
 the samples directory of OpenCV at the cpp tutorial code for the core section. Its basic usage is:
 @code{.bash}
 how_to_scan_images imageName.jpg intValueToReduce [G]

doc/tutorials/core/how_to_use_ippa_conversion/how_to_use_ippa_conversion.markdown

@@ -16,7 +16,7 @@ Code
 
 You may also find the source code in the
 `samples/cpp/tutorial_code/core/ippasync/ippasync_sample.cpp` file of the OpenCV source library or
-download it from [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/core/ippasync/ippasync_sample.cpp).
+download it from [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/core/ippasync/ippasync_sample.cpp).
 
 @include cpp/tutorial_code/core/ippasync/ippasync_sample.cpp
 

doc/tutorials/core/interoperability_with_OpenCV_1/interoperability_with_OpenCV_1.markdown

@@ -85,7 +85,7 @@ L = Mat(pI);
 A case study
 ------------
 
-Now that you have the basics done [here's](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/core/interoperability_with_OpenCV_1/interoperability_with_OpenCV_1.cpp)
+Now that you have the basics done [here's](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/core/interoperability_with_OpenCV_1/interoperability_with_OpenCV_1.cpp)
 an example that mixes the usage of the C interface with the C++ one. You will also find it in the
 sample directory of the OpenCV source code library at the
 `samples/cpp/tutorial_code/core/interoperability_with_OpenCV_1/interoperability_with_OpenCV_1.cpp` .
@@ -132,7 +132,7 @@ output:
 
 You may observe a runtime instance of this on the [YouTube
 here](https://www.youtube.com/watch?v=qckm-zvo31w) and you can [download the source code from here
-](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/core/interoperability_with_OpenCV_1/interoperability_with_OpenCV_1.cpp)
+](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/core/interoperability_with_OpenCV_1/interoperability_with_OpenCV_1.cpp)
 or find it in the
 `samples/cpp/tutorial_code/core/interoperability_with_OpenCV_1/interoperability_with_OpenCV_1.cpp`
 of the OpenCV source code library.

doc/tutorials/core/mat_the_basic_image_container/mat_the_basic_image_container.markdown

@@ -260,7 +260,7 @@ OpenCV offers support for output of other common OpenCV data structures too via
     ![](images/MatBasicContainerOut15.png)
 
 Most of the samples here have been included in a small console application. You can download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/core/mat_the_basic_image_container/mat_the_basic_image_container.cpp)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/core/mat_the_basic_image_container/mat_the_basic_image_container.cpp)
 or in the core section of the cpp samples.
 
 You can also find a quick video demonstration of this on

doc/tutorials/dnn/dnn_custom_layers/dnn_custom_layers.md

@@ -216,7 +216,7 @@ a centric one.
 @snippet dnn/edge_detection.py Register
 
 That's it! We've replaced an implemented OpenCV's layer to a custom one.
-You may find a full script in the [source code](https://github.com/opencv/opencv/tree/master/samples/dnn/edge_detection.py).
+You may find a full script in the [source code](https://github.com/opencv/opencv/tree/3.4/samples/dnn/edge_detection.py).
 
 <table border="0">
 <tr>

doc/tutorials/dnn/dnn_googlenet/dnn_googlenet.markdown

@@ -25,7 +25,7 @@ Explanation
    [bvlc_googlenet.caffemodel](http://dl.caffe.berkeleyvision.org/bvlc_googlenet.caffemodel)
 
    Also you need file with names of [ILSVRC2012](http://image-net.org/challenges/LSVRC/2012/browse-synsets) classes:
-   [classification_classes_ILSVRC2012.txt](https://github.com/opencv/opencv/tree/master/samples/dnn/classification_classes_ILSVRC2012.txt).
+   [classification_classes_ILSVRC2012.txt](https://github.com/opencv/opencv/tree/3.4/samples/dnn/classification_classes_ILSVRC2012.txt).
 
    Put these files into working dir of this program example.
 

doc/tutorials/features2d/feature_description/feature_description.markdown

@@ -24,19 +24,19 @@ Code
 
 @add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/features2D/feature_description/SURF_matching_Demo.cpp)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/features2D/feature_description/SURF_matching_Demo.cpp)
 @include samples/cpp/tutorial_code/features2D/feature_description/SURF_matching_Demo.cpp
 @end_toggle
 
 @add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/features2D/feature_description/SURFMatchingDemo.java)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/features2D/feature_description/SURFMatchingDemo.java)
 @include samples/java/tutorial_code/features2D/feature_description/SURFMatchingDemo.java
 @end_toggle
 
 @add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/features2D/feature_description/SURF_matching_Demo.py)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/features2D/feature_description/SURF_matching_Demo.py)
 @include samples/python/tutorial_code/features2D/feature_description/SURF_matching_Demo.py
 @end_toggle
 

doc/tutorials/features2d/feature_detection/feature_detection.markdown

@@ -22,19 +22,19 @@ Code
 
 @add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/features2D/feature_detection/SURF_detection_Demo.cpp)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/features2D/feature_detection/SURF_detection_Demo.cpp)
 @include samples/cpp/tutorial_code/features2D/feature_detection/SURF_detection_Demo.cpp
 @end_toggle
 
 @add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/features2D/feature_detection/SURFDetectionDemo.java)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/features2D/feature_detection/SURFDetectionDemo.java)
 @include samples/java/tutorial_code/features2D/feature_detection/SURFDetectionDemo.java
 @end_toggle
 
 @add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/features2D/feature_detection/SURF_detection_Demo.py)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/features2D/feature_detection/SURF_detection_Demo.py)
 @include samples/python/tutorial_code/features2D/feature_detection/SURF_detection_Demo.py
 @end_toggle
 

doc/tutorials/features2d/feature_flann_matcher/feature_flann_matcher.markdown

@@ -45,19 +45,19 @@ Code
 
 @add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/features2D/feature_flann_matcher/SURF_FLANN_matching_Demo.cpp)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/features2D/feature_flann_matcher/SURF_FLANN_matching_Demo.cpp)
 @include samples/cpp/tutorial_code/features2D/feature_flann_matcher/SURF_FLANN_matching_Demo.cpp
 @end_toggle
 
 @add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/features2D/feature_flann_matcher/SURFFLANNMatchingDemo.java)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/features2D/feature_flann_matcher/SURFFLANNMatchingDemo.java)
 @include samples/java/tutorial_code/features2D/feature_flann_matcher/SURFFLANNMatchingDemo.java
 @end_toggle
 
 @add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/features2D/feature_flann_matcher/SURF_FLANN_matching_Demo.py)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/features2D/feature_flann_matcher/SURF_FLANN_matching_Demo.py)
 @include samples/python/tutorial_code/features2D/feature_flann_matcher/SURF_FLANN_matching_Demo.py
 @end_toggle
 

doc/tutorials/features2d/feature_homography/feature_homography.markdown

@@ -20,19 +20,19 @@ Code
 
 @add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/features2D/feature_homography/SURF_FLANN_matching_homography_Demo.cpp)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/features2D/feature_homography/SURF_FLANN_matching_homography_Demo.cpp)
 @include samples/cpp/tutorial_code/features2D/feature_homography/SURF_FLANN_matching_homography_Demo.cpp
 @end_toggle
 
 @add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/features2D/feature_homography/SURFFLANNMatchingHomographyDemo.java)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/features2D/feature_homography/SURFFLANNMatchingHomographyDemo.java)
 @include samples/java/tutorial_code/features2D/feature_homography/SURFFLANNMatchingHomographyDemo.java
 @end_toggle
 
 @add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/features2D/feature_homography/SURF_FLANN_matching_homography_Demo.py)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/features2D/feature_homography/SURF_FLANN_matching_homography_Demo.py)
 @include samples/python/tutorial_code/features2D/feature_homography/SURF_FLANN_matching_homography_Demo.py
 @end_toggle
 

doc/tutorials/features2d/homography/homography.markdown

@@ -12,8 +12,8 @@ For detailed explanations about the theory, please refer to a computer vision co
 *   An Invitation to 3-D Vision: From Images to Geometric Models, @cite Ma:2003:IVI
 *   Computer Vision: Algorithms and Applications, @cite RS10
 
-The tutorial code can be found [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/features2D/Homography).
+The tutorial code can be found [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/features2D/Homography).
-The images used in this tutorial can be found [here](https://github.com/opencv/opencv/tree/master/samples/data) (`left*.jpg`).
+The images used in this tutorial can be found [here](https://github.com/opencv/opencv/tree/3.4/samples/data) (`left*.jpg`).
 
 Basic theory {#tutorial_homography_Basic_theory}
 ------------

doc/tutorials/features2d/trackingmotion/corner_subpixels/corner_subpixels.markdown

@@ -17,19 +17,19 @@ Code
 
 @add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/TrackingMotion/cornerSubPix_Demo.cpp)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/TrackingMotion/cornerSubPix_Demo.cpp)
 @include samples/cpp/tutorial_code/TrackingMotion/cornerSubPix_Demo.cpp
 @end_toggle
 
 @add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/TrackingMotion/corner_subpixels/CornerSubPixDemo.java)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/TrackingMotion/corner_subpixels/CornerSubPixDemo.java)
 @include samples/java/tutorial_code/TrackingMotion/corner_subpixels/CornerSubPixDemo.java
 @end_toggle
 
 @add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/TrackingMotion/corner_subpixels/cornerSubPix_Demo.py)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/TrackingMotion/corner_subpixels/cornerSubPix_Demo.py)
 @include samples/python/tutorial_code/TrackingMotion/corner_subpixels/cornerSubPix_Demo.py
 @end_toggle
 

doc/tutorials/features2d/trackingmotion/generic_corner_detector/generic_corner_detector.markdown

@@ -21,21 +21,21 @@ Code
 
 @add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/TrackingMotion/cornerDetector_Demo.cpp)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/TrackingMotion/cornerDetector_Demo.cpp)
 
 @include samples/cpp/tutorial_code/TrackingMotion/cornerDetector_Demo.cpp
 @end_toggle
 
 @add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/TrackingMotion/generic_corner_detector/CornerDetectorDemo.java)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/TrackingMotion/generic_corner_detector/CornerDetectorDemo.java)
 
 @include samples/java/tutorial_code/TrackingMotion/generic_corner_detector/CornerDetectorDemo.java
 @end_toggle
 
 @add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/TrackingMotion/generic_corner_detector/cornerDetector_Demo.py)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/TrackingMotion/generic_corner_detector/cornerDetector_Demo.py)
 
 @include samples/python/tutorial_code/TrackingMotion/generic_corner_detector/cornerDetector_Demo.py
 @end_toggle

doc/tutorials/features2d/trackingmotion/good_features_to_track/good_features_to_track.markdown

@@ -16,19 +16,19 @@ Code
 
 @add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/TrackingMotion/goodFeaturesToTrack_Demo.cpp)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/TrackingMotion/goodFeaturesToTrack_Demo.cpp)
 @include samples/cpp/tutorial_code/TrackingMotion/goodFeaturesToTrack_Demo.cpp
 @end_toggle
 
 @add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/TrackingMotion/good_features_to_track/GoodFeaturesToTrackDemo.java)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/TrackingMotion/good_features_to_track/GoodFeaturesToTrackDemo.java)
 @include samples/java/tutorial_code/TrackingMotion/good_features_to_track/GoodFeaturesToTrackDemo.java
 @end_toggle
 
 @add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/TrackingMotion/good_features_to_track/goodFeaturesToTrack_Demo.py)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/TrackingMotion/good_features_to_track/goodFeaturesToTrack_Demo.py)
 @include samples/python/tutorial_code/TrackingMotion/good_features_to_track/goodFeaturesToTrack_Demo.py
 @end_toggle
 

doc/tutorials/features2d/trackingmotion/harris_detector/harris_detector.markdown

@@ -120,19 +120,19 @@ Code
 
 @add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/TrackingMotion/cornerHarris_Demo.cpp)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/TrackingMotion/cornerHarris_Demo.cpp)
 @include samples/cpp/tutorial_code/TrackingMotion/cornerHarris_Demo.cpp
 @end_toggle
 
 @add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/TrackingMotion/harris_detector/CornerHarrisDemo.java)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/TrackingMotion/harris_detector/CornerHarrisDemo.java)
 @include samples/java/tutorial_code/TrackingMotion/harris_detector/CornerHarrisDemo.java
 @end_toggle
 
 @add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/TrackingMotion/harris_detector/cornerHarris_Demo.py)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/TrackingMotion/harris_detector/cornerHarris_Demo.py)
 @include samples/python/tutorial_code/TrackingMotion/harris_detector/cornerHarris_Demo.py
 @end_toggle
 

doc/tutorials/gpu/gpu-basics-similarity/gpu_basics_similarity.markdown

@@ -24,7 +24,7 @@ The source code
 
 You may also find the source code and the video file in the
 `samples/cpp/tutorial_code/gpu/gpu-basics-similarity/gpu-basics-similarity` directory of the OpenCV
-source library or download it from [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/gpu/gpu-basics-similarity/gpu-basics-similarity.cpp).
+source library or download it from [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/gpu/gpu-basics-similarity/gpu-basics-similarity.cpp).
 The full source code is quite long (due to the controlling of the application via the command line
 arguments and performance measurement). Therefore, to avoid cluttering up these sections with those
 you'll find here only the functions itself.

doc/tutorials/highgui/trackbar/trackbar.markdown

@@ -27,19 +27,19 @@ Let's modify the program made in the tutorial @ref tutorial_adding_images. We wi
 
 @add_toggle_cpp
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/HighGUI/AddingImagesTrackbar.cpp)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/HighGUI/AddingImagesTrackbar.cpp)
 @include cpp/tutorial_code/HighGUI/AddingImagesTrackbar.cpp
 @end_toggle
 
 @add_toggle_java
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/highgui/trackbar/AddingImagesTrackbar.java)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/highgui/trackbar/AddingImagesTrackbar.java)
 @include java/tutorial_code/highgui/trackbar/AddingImagesTrackbar.java
 @end_toggle
 
 @add_toggle_python
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/highgui/trackbar/AddingImagesTrackbar.py)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/highgui/trackbar/AddingImagesTrackbar.py)
 @include python/tutorial_code/highgui/trackbar/AddingImagesTrackbar.py
 @end_toggle
 

doc/tutorials/imgproc/erosion_dilatation/erosion_dilatation.markdown

@@ -62,19 +62,19 @@ Code
 
 @add_toggle_cpp
 This tutorial's code is shown below. You can also download it
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ImgProc/Morphology_1.cpp)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ImgProc/Morphology_1.cpp)
 @include samples/cpp/tutorial_code/ImgProc/Morphology_1.cpp
 @end_toggle
 
 @add_toggle_java
 This tutorial's code is shown below. You can also download it
-[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ImgProc/erosion_dilatation/MorphologyDemo1.java)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ImgProc/erosion_dilatation/MorphologyDemo1.java)
 @include samples/java/tutorial_code/ImgProc/erosion_dilatation/MorphologyDemo1.java
 @end_toggle
 
 @add_toggle_python
 This tutorial's code is shown below. You can also download it
-[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/imgProc/erosion_dilatation/morphology_1.py)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/imgProc/erosion_dilatation/morphology_1.py)
 @include samples/python/tutorial_code/imgProc/erosion_dilatation/morphology_1.py
 @end_toggle
 

doc/tutorials/imgproc/histograms/back_projection/back_projection.markdown

@@ -71,13 +71,13 @@ Code
 @add_toggle_cpp
 -   **Downloadable code**:
     -   Click
-        [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/Histograms_Matching/calcBackProject_Demo1.cpp)
+        [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/Histograms_Matching/calcBackProject_Demo1.cpp)
         for the basic version (explained in this tutorial).
     -   For stuff slightly fancier (using H-S histograms and floodFill to define a mask for the
         skin area) you can check the [improved
-        demo](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/Histograms_Matching/calcBackProject_Demo2.cpp)
+        demo](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/Histograms_Matching/calcBackProject_Demo2.cpp)
     -   ...or you can always check out the classical
-        [camshiftdemo](https://github.com/opencv/opencv/tree/master/samples/cpp/camshiftdemo.cpp)
+        [camshiftdemo](https://github.com/opencv/opencv/tree/3.4/samples/cpp/camshiftdemo.cpp)
         in samples.
 
 -   **Code at glance:**
@@ -87,13 +87,13 @@ Code
 @add_toggle_java
 -   **Downloadable code**:
     -   Click
-        [here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/Histograms_Matching/back_projection/CalcBackProjectDemo1.java)
+        [here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/Histograms_Matching/back_projection/CalcBackProjectDemo1.java)
         for the basic version (explained in this tutorial).
     -   For stuff slightly fancier (using H-S histograms and floodFill to define a mask for the
         skin area) you can check the [improved
-        demo](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/Histograms_Matching/back_projection/CalcBackProjectDemo2.java)
+        demo](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/Histograms_Matching/back_projection/CalcBackProjectDemo2.java)
     -   ...or you can always check out the classical
-        [camshiftdemo](https://github.com/opencv/opencv/tree/master/samples/cpp/camshiftdemo.cpp)
+        [camshiftdemo](https://github.com/opencv/opencv/tree/3.4/samples/cpp/camshiftdemo.cpp)
         in samples.
 
 -   **Code at glance:**
@@ -103,13 +103,13 @@ Code
 @add_toggle_python
 -   **Downloadable code**:
     -   Click
-        [here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/Histograms_Matching/back_projection/calcBackProject_Demo1.py)
+        [here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/Histograms_Matching/back_projection/calcBackProject_Demo1.py)
         for the basic version (explained in this tutorial).
     -   For stuff slightly fancier (using H-S histograms and floodFill to define a mask for the
         skin area) you can check the [improved
-        demo](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/Histograms_Matching/back_projection/calcBackProject_Demo2.py)
+        demo](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/Histograms_Matching/back_projection/calcBackProject_Demo2.py)
     -   ...or you can always check out the classical
-        [camshiftdemo](https://github.com/opencv/opencv/tree/master/samples/cpp/camshiftdemo.cpp)
+        [camshiftdemo](https://github.com/opencv/opencv/tree/3.4/samples/cpp/camshiftdemo.cpp)
         in samples.
 
 -   **Code at glance:**

doc/tutorials/imgproc/histograms/histogram_calculation/histogram_calculation.markdown

@@ -69,7 +69,7 @@ Code
 
 @add_toggle_cpp
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/Histograms_Matching/calcHist_Demo.cpp)
+    [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/Histograms_Matching/calcHist_Demo.cpp)
 
 -   **Code at glance:**
     @include samples/cpp/tutorial_code/Histograms_Matching/calcHist_Demo.cpp
@@ -77,7 +77,7 @@ Code
 
 @add_toggle_java
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/Histograms_Matching/histogram_calculation/CalcHistDemo.java)
+    [here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/Histograms_Matching/histogram_calculation/CalcHistDemo.java)
 
 -   **Code at glance:**
     @include samples/java/tutorial_code/Histograms_Matching/histogram_calculation/CalcHistDemo.java
@@ -85,7 +85,7 @@ Code
 
 @add_toggle_python
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/Histograms_Matching/histogram_calculation/calcHist_Demo.py)
+    [here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/Histograms_Matching/histogram_calculation/calcHist_Demo.py)
 
 -   **Code at glance:**
     @include samples/python/tutorial_code/Histograms_Matching/histogram_calculation/calcHist_Demo.py

doc/tutorials/imgproc/histograms/histogram_comparison/histogram_comparison.markdown

@@ -46,7 +46,7 @@ Code
 
 @add_toggle_cpp
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/Histograms_Matching/compareHist_Demo.cpp)
+    [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/Histograms_Matching/compareHist_Demo.cpp)
 
 -   **Code at glance:**
     @include samples/cpp/tutorial_code/Histograms_Matching/compareHist_Demo.cpp
@@ -54,7 +54,7 @@ Code
 
 @add_toggle_java
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/Histograms_Matching/histogram_comparison/CompareHistDemo.java)
+    [here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/Histograms_Matching/histogram_comparison/CompareHistDemo.java)
 
 -   **Code at glance:**
     @include samples/java/tutorial_code/Histograms_Matching/histogram_comparison/CompareHistDemo.java
@@ -62,7 +62,7 @@ Code
 
 @add_toggle_python
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/Histograms_Matching/histogram_comparison/compareHist_Demo.py)
+    [here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/Histograms_Matching/histogram_comparison/compareHist_Demo.py)
 
 -   **Code at glance:**
     @include samples/python/tutorial_code/Histograms_Matching/histogram_comparison/compareHist_Demo.py

doc/tutorials/imgproc/histograms/histogram_equalization/histogram_equalization.markdown

@@ -64,7 +64,7 @@ Code
 
 @add_toggle_cpp
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/Histograms_Matching/EqualizeHist_Demo.cpp)
+    [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/Histograms_Matching/EqualizeHist_Demo.cpp)
 
 -   **Code at glance:**
     @include samples/cpp/tutorial_code/Histograms_Matching/EqualizeHist_Demo.cpp
@@ -72,7 +72,7 @@ Code
 
 @add_toggle_java
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/Histograms_Matching/histogram_equalization/EqualizeHistDemo.java)
+    [here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/Histograms_Matching/histogram_equalization/EqualizeHistDemo.java)
 
 -   **Code at glance:**
     @include samples/java/tutorial_code/Histograms_Matching/histogram_equalization/EqualizeHistDemo.java
@@ -80,7 +80,7 @@ Code
 
 @add_toggle_python
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/Histograms_Matching/histogram_equalization/EqualizeHist_Demo.py)
+    [here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/Histograms_Matching/histogram_equalization/EqualizeHist_Demo.py)
 
 -   **Code at glance:**
     @include samples/python/tutorial_code/Histograms_Matching/histogram_equalization/EqualizeHist_Demo.py

doc/tutorials/imgproc/histograms/template_matching/template_matching.markdown

@@ -130,7 +130,7 @@ Code
 @add_toggle_cpp
 
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/Histograms_Matching/MatchTemplate_Demo.cpp)
+    [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/Histograms_Matching/MatchTemplate_Demo.cpp)
 -   **Code at glance:**
     @include samples/cpp/tutorial_code/Histograms_Matching/MatchTemplate_Demo.cpp
 
@@ -139,7 +139,7 @@ Code
 @add_toggle_java
 
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ImgProc/tutorial_template_matching/MatchTemplateDemo.java)
+    [here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ImgProc/tutorial_template_matching/MatchTemplateDemo.java)
 -   **Code at glance:**
     @include samples/java/tutorial_code/ImgProc/tutorial_template_matching/MatchTemplateDemo.java
 
@@ -148,7 +148,7 @@ Code
 @add_toggle_python
 
 -   **Downloadable code**: Click
-    [here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/imgProc/match_template/match_template.py)
+    [here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/imgProc/match_template/match_template.py)
 -   **Code at glance:**
     @include samples/python/tutorial_code/imgProc/match_template/match_template.py
 

doc/tutorials/imgproc/imgtrans/canny_detector/canny_detector.markdown

@@ -68,19 +68,19 @@ Code
 
 @add_toggle_cpp
 -   The tutorial code's is shown lines below. You can also download it from
-    [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ImgTrans/CannyDetector_Demo.cpp)
+    [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ImgTrans/CannyDetector_Demo.cpp)
     @include samples/cpp/tutorial_code/ImgTrans/CannyDetector_Demo.cpp
 @end_toggle
 
 @add_toggle_java
 -   The tutorial code's is shown lines below. You can also download it from
-    [here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ImgTrans/canny_detector/CannyDetectorDemo.java)
+    [here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ImgTrans/canny_detector/CannyDetectorDemo.java)
     @include samples/java/tutorial_code/ImgTrans/canny_detector/CannyDetectorDemo.java
 @end_toggle
 
 @add_toggle_python
 -   The tutorial code's is shown lines below. You can also download it from
-    [here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/ImgTrans/canny_detector/CannyDetector_Demo.py)
+    [here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/ImgTrans/canny_detector/CannyDetector_Demo.py)
     @include samples/python/tutorial_code/ImgTrans/canny_detector/CannyDetector_Demo.py
 @end_toggle
 

doc/tutorials/imgproc/imgtrans/distance_transformation/distance_transform.markdown

@@ -17,7 +17,7 @@ Code
 ----
 
 This tutorial code's is shown lines below. You can also download it from
-    [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ImgTrans/imageSegmentation.cpp).
+    [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ImgTrans/imageSegmentation.cpp).
 @include samples/cpp/tutorial_code/ImgTrans/imageSegmentation.cpp
 
 Explanation / Result

doc/tutorials/imgproc/imgtrans/remap/remap.markdown

@@ -53,19 +53,19 @@ Code
 
 @add_toggle_cpp
 -   The tutorial code's is shown lines below. You can also download it from
-    [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ImgTrans/Remap_Demo.cpp)
+    [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ImgTrans/Remap_Demo.cpp)
     @include samples/cpp/tutorial_code/ImgTrans/Remap_Demo.cpp
 @end_toggle
 
 @add_toggle_java
 -   The tutorial code's is shown lines below. You can also download it from
-    [here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ImgTrans/remap/RemapDemo.java)
+    [here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ImgTrans/remap/RemapDemo.java)
     @include samples/java/tutorial_code/ImgTrans/remap/RemapDemo.java
 @end_toggle
 
 @add_toggle_python
 -   The tutorial code's is shown lines below. You can also download it from
-    [here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/ImgTrans/remap/Remap_Demo.py)
+    [here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/ImgTrans/remap/Remap_Demo.py)
     @include samples/python/tutorial_code/ImgTrans/remap/Remap_Demo.py
 @end_toggle
 

doc/tutorials/imgproc/opening_closing_hats/opening_closing_hats.markdown

@@ -81,19 +81,19 @@ Code
 
 @add_toggle_cpp
 This tutorial's code is shown below. You can also download it
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ImgProc/Morphology_2.cpp)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ImgProc/Morphology_2.cpp)
 @include cpp/tutorial_code/ImgProc/Morphology_2.cpp
 @end_toggle
 
 @add_toggle_java
 This tutorial's code is shown below. You can also download it
-[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ImgProc/opening_closing_hats/MorphologyDemo2.java)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ImgProc/opening_closing_hats/MorphologyDemo2.java)
 @include java/tutorial_code/ImgProc/opening_closing_hats/MorphologyDemo2.java
 @end_toggle
 
 @add_toggle_python
 This tutorial's code is shown below. You can also download it
-[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/imgProc/opening_closing_hats/morphology_2.py)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/imgProc/opening_closing_hats/morphology_2.py)
 @include python/tutorial_code/imgProc/opening_closing_hats/morphology_2.py
 @end_toggle
 

doc/tutorials/imgproc/shapedescriptors/bounding_rects_circles/bounding_rects_circles.markdown

@@ -16,7 +16,7 @@ Code
 ----
 
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ShapeDescriptors/generalContours_demo1.cpp)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ShapeDescriptors/generalContours_demo1.cpp)
 @include samples/cpp/tutorial_code/ShapeDescriptors/generalContours_demo1.cpp
 
 Explanation

doc/tutorials/imgproc/shapedescriptors/bounding_rotated_ellipses/bounding_rotated_ellipses.markdown

@@ -16,7 +16,7 @@ Code
 ----
 
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ShapeDescriptors/generalContours_demo2.cpp)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ShapeDescriptors/generalContours_demo2.cpp)
 @include samples/cpp/tutorial_code/ShapeDescriptors/generalContours_demo2.cpp
 
 Explanation

doc/tutorials/imgproc/shapedescriptors/find_contours/find_contours.markdown

@@ -16,7 +16,7 @@ Code
 ----
 
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ShapeDescriptors/findContours_demo.cpp)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ShapeDescriptors/findContours_demo.cpp)
 @include samples/cpp/tutorial_code/ShapeDescriptors/findContours_demo.cpp
 
 Explanation

doc/tutorials/imgproc/shapedescriptors/hull/hull.markdown

@@ -15,7 +15,7 @@ Code
 ----
 
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ShapeDescriptors/hull_demo.cpp)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ShapeDescriptors/hull_demo.cpp)
 
 @include samples/cpp/tutorial_code/ShapeDescriptors/hull_demo.cpp
 

doc/tutorials/imgproc/shapedescriptors/moments/moments.markdown

@@ -17,7 +17,7 @@ Code
 ----
 
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ShapeDescriptors/moments_demo.cpp)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ShapeDescriptors/moments_demo.cpp)
 @include samples/cpp/tutorial_code/ShapeDescriptors/moments_demo.cpp
 
 Explanation

doc/tutorials/imgproc/shapedescriptors/point_polygon_test/point_polygon_test.markdown

@@ -15,7 +15,7 @@ Code
 ----
 
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ShapeDescriptors/pointPolygonTest_demo.cpp)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ShapeDescriptors/pointPolygonTest_demo.cpp)
 @include samples/cpp/tutorial_code/ShapeDescriptors/pointPolygonTest_demo.cpp
 
 Explanation

doc/tutorials/imgproc/threshold/threshold.markdown

@@ -98,19 +98,19 @@ Code
 
 @add_toggle_cpp
 The tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ImgProc/Threshold.cpp)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ImgProc/Threshold.cpp)
 @include samples/cpp/tutorial_code/ImgProc/Threshold.cpp
 @end_toggle
 
 @add_toggle_java
 The tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ImgProc/threshold/Threshold.java)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ImgProc/threshold/Threshold.java)
 @include samples/java/tutorial_code/ImgProc/threshold/Threshold.java
 @end_toggle
 
 @add_toggle_python
 The tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/imgProc/threshold/threshold.py)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/imgProc/threshold/threshold.py)
 @include samples/python/tutorial_code/imgProc/threshold/threshold.py
 @end_toggle
 

doc/tutorials/imgproc/threshold_inRange/threshold_inRange.markdown

@@ -40,19 +40,19 @@ Code
 
 @add_toggle_cpp
 The tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ImgProc/Threshold_inRange.cpp)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ImgProc/Threshold_inRange.cpp)
 @include samples/cpp/tutorial_code/ImgProc/Threshold_inRange.cpp
 @end_toggle
 
 @add_toggle_java
 The tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/java/tutorial_code/ImgProc/threshold_inRange/ThresholdInRange.java)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/java/tutorial_code/ImgProc/threshold_inRange/ThresholdInRange.java)
 @include samples/java/tutorial_code/ImgProc/threshold_inRange/ThresholdInRange.java
 @end_toggle
 
 @add_toggle_python
 The tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/python/tutorial_code/imgProc/threshold_inRange/threshold_inRange.py)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/python/tutorial_code/imgProc/threshold_inRange/threshold_inRange.py)
 @include samples/python/tutorial_code/imgProc/threshold_inRange/threshold_inRange.py
 @end_toggle
 

doc/tutorials/introduction/android_binary_package/android_ocl_intro.markdown

@@ -17,7 +17,7 @@ If you need help with anything of the above, you may refer to our @ref tutorial_
 This tutorial also assumes you have an Android operated device with OpenCL enabled.
 
 The related source code is located within OpenCV samples at
-[opencv/samples/android/tutorial-4-opencl](https://github.com/opencv/opencv/tree/master/samples/android/tutorial-4-opencl/) directory.
+[opencv/samples/android/tutorial-4-opencl](https://github.com/opencv/opencv/tree/3.4/samples/android/tutorial-4-opencl/) directory.
 
 Preface
 -------
@@ -244,7 +244,7 @@ As you can see, inheritors for `Camera` and `Camera2` APIs should implement the
 @endcode
 
 Let's leave the details of their implementation beyond of this tutorial, please refer the
-[source code](https://github.com/opencv/opencv/tree/master/samples/android/tutorial-4-opencl/) to see them.
+[source code](https://github.com/opencv/opencv/tree/3.4/samples/android/tutorial-4-opencl/) to see them.
 
 Preview Frames modification
 ---------------------------

doc/tutorials/introduction/display_image/display_image.markdown

@@ -14,7 +14,7 @@ Source Code
 -----------
 
 Download the source code from
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/introduction/display_image/display_image.cpp).
+[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/introduction/display_image/display_image.cpp).
 
 @include cpp/tutorial_code/introduction/display_image/display_image.cpp
 

doc/tutorials/introduction/windows_visual_studio_opencv/windows_visual_studio_opencv.markdown

@@ -194,7 +194,7 @@ Test it!
 --------
 
 Now to try this out download our little test [source code
-](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/introduction/windows_visual_studio_opencv/introduction_windows_vs.cpp)
+](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/introduction/windows_visual_studio_opencv/introduction_windows_vs.cpp)
 or get it from the sample code folder of the OpenCV sources. Add this to your project and build it.
 Here's its content:
 
@@ -210,7 +210,7 @@ the *IDE* the console window will not close once finished. It will wait for a ke
 This is important to remember when you code inside the code open and save commands. Your resources
 will be saved ( and queried for at opening!!!) relatively to your working directory. This is unless
 you give a full, explicit path as a parameter for the I/O functions. In the code above we open [this
-OpenCV logo](https://github.com/opencv/opencv/tree/master/samples/data/opencv-logo.png). Before starting up the application,
+OpenCV logo](https://github.com/opencv/opencv/tree/3.4/samples/data/opencv-logo.png). Before starting up the application,
 make sure you place
 the image file in your current working directory. Modify the image file name inside the code to try
 it out on other images too. Run it and voil á:

doc/tutorials/ml/introduction_to_pca/introduction_to_pca.markdown

@@ -92,10 +92,10 @@ Source Code
 -----------
 
 This tutorial code's is shown lines below. You can also download it from
-    [here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ml/introduction_to_pca/introduction_to_pca.cpp).
+    [here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ml/introduction_to_pca/introduction_to_pca.cpp).
 @include cpp/tutorial_code/ml/introduction_to_pca/introduction_to_pca.cpp
 
-@note Another example using PCA for dimensionality reduction while maintaining an amount of variance can be found at [opencv_source_code/samples/cpp/pca.cpp](https://github.com/opencv/opencv/tree/master/samples/cpp/pca.cpp)
+@note Another example using PCA for dimensionality reduction while maintaining an amount of variance can be found at [opencv_source_code/samples/cpp/pca.cpp](https://github.com/opencv/opencv/tree/3.4/samples/cpp/pca.cpp)
 
 Explanation
 -----------

doc/tutorials/ml/non_linear_svms/non_linear_svms.markdown

@@ -87,7 +87,7 @@ Source Code
 -----------
 
 You may also find the source code in `samples/cpp/tutorial_code/ml/non_linear_svms` folder of the OpenCV source library or
-[download it from here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/ml/non_linear_svms/non_linear_svms.cpp).
+[download it from here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/ml/non_linear_svms/non_linear_svms.cpp).
 
 @note The following code has been implemented with OpenCV 3.0 classes and functions. An equivalent version of the code
 using OpenCV 2.4 can be found in [this page.](http://docs.opencv.org/2.4/doc/tutorials/ml/non_linear_svms/non_linear_svms.html#nonlinearsvms)

doc/tutorials/objdetect/cascade_classifier/cascade_classifier.markdown

@@ -18,7 +18,7 @@ Code
 ----
 
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/objectDetection/objectDetection.cpp)
+[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/objectDetection/objectDetection.cpp)
 @include samples/cpp/tutorial_code/objectDetection/objectDetection.cpp
 
 Explanation

doc/tutorials/objdetect/traincascade.markdown

@@ -6,7 +6,7 @@ Introduction
 
 Working with a boosted cascade of weak classifiers includes two major stages: the training and the detection stage. The detection stage using either HAAR or LBP based models, is described in the @ref tutorial_cascade_classifier "object detection tutorial". This documentation gives an overview of the functionality needed to train your own boosted cascade of weak classifiers. The current guide will walk through all the different stages: collecting training data, preparation of the training data and executing the actual model training.
 
-To support this tutorial, several official OpenCV applications will be used: [opencv_createsamples](https://github.com/opencv/opencv/tree/master/apps/createsamples), [opencv_annotation](https://github.com/opencv/opencv/tree/master/apps/annotation), [opencv_traincascade](https://github.com/opencv/opencv/tree/master/apps/traincascade) and [opencv_visualisation](https://github.com/opencv/opencv/tree/master/apps/visualisation).
+To support this tutorial, several official OpenCV applications will be used: [opencv_createsamples](https://github.com/opencv/opencv/tree/3.4/apps/createsamples), [opencv_annotation](https://github.com/opencv/opencv/tree/3.4/apps/annotation), [opencv_traincascade](https://github.com/opencv/opencv/tree/3.4/apps/traincascade) and [opencv_visualisation](https://github.com/opencv/opencv/tree/3.4/apps/visualisation).
 
 ### Important notes
 

doc/tutorials/stitching/stitcher/stitcher.markdown

@@ -15,7 +15,7 @@ Code
 ----
 
 This tutorial code's is shown lines below. You can also download it from
-[here](https://github.com/opencv/opencv/tree/master/samples/cpp/samples/cpp/stitching.cpp).
+[here](https://github.com/opencv/opencv/tree/3.4/samples/cpp/samples/cpp/stitching.cpp).
 
 @include samples/cpp/stitching.cpp
 
@@ -111,5 +111,5 @@ See also
 
 If you want to study internals of the stitching pipeline or you want to experiment with detailed
 configuration see
-[stitching_detailed.cpp](https://github.com/opencv/opencv/tree/master/samples/cpp/stitching_detailed.cpp)
+[stitching_detailed.cpp](https://github.com/opencv/opencv/tree/3.4/samples/cpp/stitching_detailed.cpp)
 in `opencv/samples/cpp` folder.

doc/tutorials/video/background_subtraction/background_subtraction.markdown

@@ -43,7 +43,7 @@ file or a sequence of images.
 We will use @ref cv::BackgroundSubtractorMOG2 in this sample, to generate the foreground mask.
 
 The results as well as the input data are shown on the screen.
-The source file can be downloaded [here ](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/video/bg_sub.cpp).
+The source file can be downloaded [here ](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/video/bg_sub.cpp).
 
 @include samples/cpp/tutorial_code/video/bg_sub.cpp
 

doc/tutorials/videoio/intelperc.markdown

@@ -78,5 +78,5 @@ there are two flags that should be used to set/get property of the needed genera
     flag value is assumed by default if neither of the two possible values of the property is set.
 
 For more information please refer to the example of usage
-[intelperc_capture.cpp](https://github.com/opencv/opencv/tree/master/samples/cpp/intelperc_capture.cpp)
+[intelperc_capture.cpp](https://github.com/opencv/opencv/tree/3.4/samples/cpp/intelperc_capture.cpp)
 in opencv/samples/cpp folder.

doc/tutorials/videoio/kinect_openni.markdown

@@ -134,5 +134,5 @@ property. The following properties of cameras available through OpenNI interface
     -   CAP_OPENNI_DEPTH_GENERATOR_REGISTRATION = CAP_OPENNI_DEPTH_GENERATOR + CAP_PROP_OPENNI_REGISTRATION
 
 For more information please refer to the example of usage
-[openni_capture.cpp](https://github.com/opencv/opencv/tree/master/samples/cpp/openni_capture.cpp) in
+[openni_capture.cpp](https://github.com/opencv/opencv/tree/3.4/samples/cpp/openni_capture.cpp) in
 opencv/samples/cpp folder.

doc/tutorials/videoio/video-input-psnr-ssim/video_input_psnr_ssim.markdown

@@ -20,8 +20,8 @@ As a test case where to show off these using OpenCV I've created a small program
 video files and performs a similarity check between them. This is something you could use to check
 just how well a new video compressing algorithms works. Let there be a reference (original) video
 like [this small Megamind clip
-](https://github.com/opencv/opencv/tree/master/samples/data/Megamind.avi) and [a compressed
+](https://github.com/opencv/opencv/tree/3.4/samples/data/Megamind.avi) and [a compressed
-version of it ](https://github.com/opencv/opencv/tree/master/samples/data/Megamind_bugy.avi).
+version of it ](https://github.com/opencv/opencv/tree/3.4/samples/data/Megamind_bugy.avi).
 You may also find the source code and these video file in the
 `samples/data` folder of the OpenCV source library.
 

doc/tutorials/videoio/video-write/video_write.markdown

@@ -31,7 +31,7 @@ The source code
 
 You may also find the source code and these video file in the
 `samples/cpp/tutorial_code/videoio/video-write/` folder of the OpenCV source library or [download it
-from here ](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/videoio/video-write/video-write.cpp).
+from here ](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/videoio/video-write/video-write.cpp).
 
 @include cpp/tutorial_code/videoio/video-write/video-write.cpp
 

doc/tutorials/viz/creating_widgets/creating_widgets.markdown

@@ -12,7 +12,7 @@ In this tutorial you will learn how to
 Code
 ----
 
-You can download the code from [here ](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/viz/creating_widgets.cpp).
+You can download the code from [here ](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/viz/creating_widgets.cpp).
 @include samples/cpp/tutorial_code/viz/creating_widgets.cpp
 
 Explanation

doc/tutorials/viz/histo3D/histo3D.markdown

@@ -12,7 +12,7 @@ In this tutorial you will learn how to
 Code
 ----
 
-You can download the code from [here ](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/viz/histo3D.cpp).
+You can download the code from [here ](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/viz/histo3D.cpp).
 @include samples/cpp/tutorial_code/viz/histo3D.cpp
 
 Explanation

doc/tutorials/viz/launching_viz/launching_viz.markdown

@@ -14,7 +14,7 @@ In this tutorial you will learn how to
 Code
 ----
 
-You can download the code from [here ](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/viz/launching_viz.cpp).
+You can download the code from [here ](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/viz/launching_viz.cpp).
 @include samples/cpp/tutorial_code/viz/launching_viz.cpp
 
 Explanation

doc/tutorials/viz/transformations/transformations.markdown

@@ -13,7 +13,7 @@ In this tutorial you will learn how to
 Code
 ----
 
-You can download the code from [here ](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/viz/transformations.cpp).
+You can download the code from [here ](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/viz/transformations.cpp).
 @include samples/cpp/tutorial_code/viz/transformations.cpp
 
 Explanation

doc/tutorials/viz/widget_pose/widget_pose.markdown

@@ -13,7 +13,7 @@ In this tutorial you will learn how to
 Code
 ----
 
-You can download the code from [here ](https://github.com/opencv/opencv/tree/master/samples/cpp/tutorial_code/viz/widget_pose.cpp).
+You can download the code from [here ](https://github.com/opencv/opencv/tree/3.4/samples/cpp/tutorial_code/viz/widget_pose.cpp).
 @include samples/cpp/tutorial_code/viz/widget_pose.cpp
 
 Explanation

modules/core/doc/cuda.markdown

@@ -82,4 +82,4 @@ Block Matching algorithm has been successfully parallelized using the following
 3.  Merge the results into a single disparity map.
 
 With this algorithm, a dual GPU gave a 180% performance increase comparing to the single Fermi GPU.
-For a source code example, see <https://github.com/opencv/opencv/tree/master/samples/gpu/>.
+For a source code example, see <https://github.com/opencv/opencv/tree/3.4/samples/gpu/>.

modules/highgui/include/opencv2/highgui.hpp

@@ -456,7 +456,7 @@ CV_EXPORTS_W Rect getWindowImageRect(const String& winname);
 
 @param winname Name of the window.
 @param onMouse Mouse callback. See OpenCV samples, such as
-<https://github.com/opencv/opencv/tree/master/samples/cpp/ffilldemo.cpp>, on how to specify and
+<https://github.com/opencv/opencv/tree/3.4/samples/cpp/ffilldemo.cpp>, on how to specify and
 use the callback.
 @param userdata The optional parameter passed to the callback.
  */

modules/objdetect/include/opencv2/objdetect.hpp

@@ -91,7 +91,7 @@ compensate for the differences in the size of areas. The sums of pixel values ov
 regions are calculated rapidly using integral images (see below and the integral description).
 
 To see the object detector at work, have a look at the facedetect demo:
-<https://github.com/opencv/opencv/tree/master/samples/cpp/dbt_face_detection.cpp>
+<https://github.com/opencv/opencv/tree/3.4/samples/cpp/dbt_face_detection.cpp>
 
 The following reference is for the detection part only. There is a separate application called
 opencv_traincascade that can train a cascade of boosted classifiers from a set of samples.

samples/cpp/facial_features.cpp

@@ -89,7 +89,7 @@ static void help()
         "\tThis will detect only the face in image.jpg.\n";
 
     cout << " \n\nThe classifiers for face and eyes can be downloaded from : "
-        " \nhttps://github.com/opencv/opencv/tree/master/data/haarcascades";
+        " \nhttps://github.com/opencv/opencv/tree/3.4/data/haarcascades";
 
     cout << "\n\nThe classifiers for nose and mouth can be downloaded from : "
         " \nhttps://github.com/opencv/opencv_contrib/tree/master/modules/face/data/cascades\n";

samples/dnn/README.md

@@ -7,7 +7,7 @@
 |    Model | Scale |   Size WxH|   Mean subtraction | Channels order |
 |---------------|-------|-----------|--------------------|-------|
 | [MobileNet-SSD, Caffe](https://github.com/chuanqi305/MobileNet-SSD/) | `0.00784 (2/255)` | `300x300` | `127.5 127.5 127.5` | BGR |
-| [OpenCV face detector](https://github.com/opencv/opencv/tree/master/samples/dnn/face_detector) | `1.0` | `300x300` | `104 177 123` | BGR |
+| [OpenCV face detector](https://github.com/opencv/opencv/tree/3.4/samples/dnn/face_detector) | `1.0` | `300x300` | `104 177 123` | BGR |
 | [SSDs from TensorFlow](https://github.com/tensorflow/models/tree/master/research/object_detection/) | `0.00784 (2/255)` | `300x300` | `127.5 127.5 127.5` | RGB |
 | [YOLO](https://pjreddie.com/darknet/yolo/) | `0.00392 (1/255)` | `416x416` | `0 0 0` | RGB |
 | [VGG16-SSD](https://github.com/weiliu89/caffe/tree/ssd) | `1.0` | `300x300` | `104 117 123` | BGR |
@@ -17,7 +17,7 @@
 | [Faster-RCNN, InceptionV2 backbone](https://github.com/tensorflow/models/tree/master/research/object_detection/) | `0.00784 (2/255)` | `300x300` | `127.5 127.5 127.5` | RGB |
 
 #### Face detection
-[An origin model](https://github.com/opencv/opencv/tree/master/samples/dnn/face_detector)
+[An origin model](https://github.com/opencv/opencv/tree/3.4/samples/dnn/face_detector)
 with single precision floating point weights has been quantized using [TensorFlow framework](https://www.tensorflow.org/).
 To achieve the best accuracy run the model on BGR images resized to `300x300` applying mean subtraction
 of values `(104, 177, 123)` for each blue, green and red channels correspondingly.
@@ -60,4 +60,4 @@ AR @[ IoU=0.50:0.95 | area= large | maxDets=100 ] | 0.528     | 0.528          |
 * [Models downloading script](https://github.com/opencv/opencv_extra/blob/master/testdata/dnn/download_models.py)
 * [Configuration files adopted for OpenCV](https://github.com/opencv/opencv_extra/tree/master/testdata/dnn)
 * [How to import models from TensorFlow Object Detection API](https://github.com/opencv/opencv/wiki/TensorFlow-Object-Detection-API)
-* [Names of classes from different datasets](https://github.com/opencv/opencv/tree/master/samples/data/dnn)
+* [Names of classes from different datasets](https://github.com/opencv/opencv/tree/3.4/samples/data/dnn)