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Merge pull request #25813 from kaingwade:orbbec-astra
Update the tutorial of using Orbbec Astra cameras #25813 This PR is the backport of Orbbec OpenNI-based Astra camera related changes from #25410 to the 4.x branch, which includes updating the tutorial of Orbbec Astra cameras, renaming `orbbec_astra.cpp`. ### Pull Request Readiness Checklist See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request - [x] I agree to contribute to the project under Apache 2 License. - [x] To the best of my knowledge, the proposed patch is not based on a code under GPL or another license that is incompatible with OpenCV - [x] The PR is proposed to the proper branch - [ ] There is a reference to the original bug report and related work - [ ] There is accuracy test, performance test and test data in opencv_extra repository, if applicable Patch to opencv_extra has the same branch name. - [x] The feature is well documented and sample code can be built with the project CMake
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@ -3,7 +3,7 @@ Using Creative Senz3D and other Intel RealSense SDK compatible depth sensors {#t
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@tableofcontents
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@prev_tutorial{tutorial_orbbec_astra}
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@prev_tutorial{tutorial_orbbec_astra_openni}
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@next_tutorial{tutorial_wayland_ubuntu}
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![hardwares](images/realsense.jpg)
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@ -4,7 +4,7 @@ Using Kinect and other OpenNI compatible depth sensors {#tutorial_kinect_openni}
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@tableofcontents
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@prev_tutorial{tutorial_video_write}
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@next_tutorial{tutorial_orbbec_astra}
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@next_tutorial{tutorial_orbbec_astra_openni}
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Depth sensors compatible with OpenNI (Kinect, XtionPRO, ...) are supported through VideoCapture
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@ -1,4 +1,4 @@
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Using Orbbec Astra 3D cameras {#tutorial_orbbec_astra}
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Using Orbbec Astra 3D cameras {#tutorial_orbbec_astra_openni}
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======================================================
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@tableofcontents
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@ -9,7 +9,7 @@ Using Orbbec Astra 3D cameras {#tutorial_orbbec_astra}
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### Introduction
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This tutorial is devoted to the Astra Series of Orbbec 3D cameras (https://orbbec3d.com/index/Product/info.html?cate=38&id=36).
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This tutorial is devoted to the Astra Series of Orbbec 3D cameras (https://www.orbbec.com/products/structured-light-camera/astra-series/).
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That cameras have a depth sensor in addition to a common color sensor. The depth sensors can be read using
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the open source OpenNI API with @ref cv::VideoCapture class. The video stream is provided through the regular
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camera interface.
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@ -18,7 +18,7 @@ camera interface.
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In order to use the Astra camera's depth sensor with OpenCV you should do the following steps:
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-# Download the latest version of Orbbec OpenNI SDK (from here <https://orbbec3d.com/index/download.html>).
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-# Download the latest version of Orbbec OpenNI SDK (from here <https://www.orbbec.com/developers/openni-sdk/>).
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Unzip the archive, choose the build according to your operating system and follow installation
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steps provided in the Readme file.
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@ -70,6 +70,12 @@ In order to use the Astra camera's depth sensor with OpenCV you should do the fo
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echo "exit"
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@endcode
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@note The last tried version `2.3.0.86_202210111154_4c8f5aa4_beta6` does not work correctly with
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modern Linux, even after libusb rebuild as recommended by the instruction. The last know good
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configuration is version 2.3.0.63 (tested with Ubuntu 18.04 amd64). It's not provided officialy
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with the downloading page, but published by Orbbec technical suport on Orbbec community forum
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[here](https://3dclub.orbbec3d.com/t/universal-download-thread-for-astra-series-cameras/622).
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-# Now you can configure OpenCV with OpenNI support enabled by setting the `WITH_OPENNI2` flag in CMake.
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You may also like to enable the `BUILD_EXAMPLES` flag to get a code sample working with your Astra camera.
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Run the following commands in the directory containing OpenCV source code to enable OpenNI support:
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@ -106,7 +112,7 @@ can be read using the OpenNI interface with @ref cv::VideoCapture class. The vid
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not available through OpenNI API and is only provided via the regular camera interface.
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So, to get both depth and color frames, two @ref cv::VideoCapture objects should be created:
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@snippetlineno samples/cpp/tutorial_code/videoio/orbbec_astra/orbbec_astra.cpp Open streams
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@snippetlineno samples/cpp/tutorial_code/videoio/openni_orbbec_astra/openni_orbbec_astra.cpp Open streams
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The first object will use the OpenNI2 API to retrieve depth data. The second one uses the
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Video4Linux2 interface to access the color sensor. Note that the example above assumes that
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@ -119,12 +125,12 @@ For this example, we’ll configure width and height of both streams to VGA reso
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the maximum resolution available for both sensors, and we’d like both stream parameters to be the
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same for easier color-to-depth data registration:
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@snippetlineno samples/cpp/tutorial_code/videoio/orbbec_astra/orbbec_astra.cpp Setup streams
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@snippetlineno samples/cpp/tutorial_code/videoio/openni_orbbec_astra/openni_orbbec_astra.cpp Setup streams
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For setting and retrieving some property of sensor data generators use @ref cv::VideoCapture::set and
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@ref cv::VideoCapture::get methods respectively, e.g. :
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@snippetlineno samples/cpp/tutorial_code/videoio/orbbec_astra/orbbec_astra.cpp Get properties
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@snippetlineno samples/cpp/tutorial_code/videoio/openni_orbbec_astra/openni_orbbec_astra.cpp Get properties
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The following properties of cameras available through OpenNI interface are supported for the depth
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generator:
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@ -156,7 +162,7 @@ As there are two video sources that should be read simultaneously, it’s necess
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threads to avoid blocking. Example implementation that gets frames from each sensor in a new thread
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and stores them in a list along with their timestamps:
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@snippetlineno samples/cpp/tutorial_code/videoio/orbbec_astra/orbbec_astra.cpp Read streams
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@snippetlineno samples/cpp/tutorial_code/videoio/openni_orbbec_astra/openni_orbbec_astra.cpp Read streams
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VideoCapture can retrieve the following data:
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@ -177,7 +183,7 @@ two video streams may become out of sync even when both streams are set up for t
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A post-synchronization procedure can be applied to the streams to combine depth and color frames into
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pairs. The sample code below demonstrates this procedure:
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@snippetlineno samples/cpp/tutorial_code/videoio/orbbec_astra/orbbec_astra.cpp Pair frames
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@snippetlineno samples/cpp/tutorial_code/videoio/openni_orbbec_astra/openni_orbbec_astra.cpp Pair frames
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In the code snippet above the execution is blocked until there are some frames in both frame lists.
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When there are new frames, their timestamps are being checked -- if they differ more than a half of
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@ -194,5 +200,5 @@ but the depth data makes it easy.
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![Depth frame](images/astra_depth.png)
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The complete implementation can be found in
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[orbbec_astra.cpp](https://github.com/opencv/opencv/tree/4.x/samples/cpp/tutorial_code/videoio/orbbec_astra/orbbec_astra.cpp)
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[openni_orbbec_astra.cpp](https://github.com/opencv/opencv/tree/4.x/samples/cpp/tutorial_code/videoio/openni_orbbec_astra/openni_orbbec_astra.cpp)
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in `samples/cpp/tutorial_code/videoio` directory.
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@ -6,6 +6,6 @@ Application utils (highgui, imgcodecs, videoio modules) {#tutorial_table_of_cont
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- @subpage tutorial_video_input_psnr_ssim
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- @subpage tutorial_video_write
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- @subpage tutorial_kinect_openni
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- @subpage tutorial_orbbec_astra
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- @subpage tutorial_orbbec_astra_openni
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- @subpage tutorial_intelperc
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- @subpage tutorial_wayland_ubuntu
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