Abhishek Gola aef6ae4872 Merge pull request #27396 from abhishek-gola:hdr_bug_fix ... Fix NaNs in HDR Triangle Weights and Tonemapping and Update LDR Ground Truth in tutorial #27396 The PR closes #27392 Updated the triangle weights to use a small epsilon value instead of zero to prevent NaN issues in HDR processing. Also fixed a float-to-double division issue by explicitly casting double values to float, which was previously producing garbage values and leading to NaNs in tonemapping. The current LDR ground truth image used in the tutorial [ldr.png](https://github.com/opencv/opencv/blob/4.x/doc/tutorials/others/images/ldr.png) was originally generated using TonemapDurand (check this commit 833f8d16fa), which was moved to opencv_contrib a long time ago in this commit: 742f22c09b. However, the current Tonemap implementation in OpenCV main only performs normalization and gamma correction, which produces noticeably different results. This PR updates the LDR grouth truth image in tutorial with the result of TonemapDrago, and tutorials to use TonemapDrago as Tonemap gives a darker image. Tonemap output:  TonemapDrago output:  ### 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 - [x] There is a reference to the original bug report and related work - [x] 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		2025-06-05 09:02:58 +03:00
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example_cmake	Fix configuring with CMake version 4	2025-04-02 13:45:08 -07:00
tutorial_code	Merge pull request #27396 from abhishek-gola:hdr_bug_fix	2025-06-05 09:02:58 +03:00
3calibration.cpp	Merge pull request #23108 from crackwitz:issue-23107	2023-01-09 09:55:31 +00:00
application_trace.cpp	Update Samples	2019-09-05 01:10:51 +03:00
aruco_dict_utils.cpp	Merge pull request #23018 from stopmosk:move-aruco-tutorial	2024-02-26 14:57:46 +03:00
asift.cpp	Merge pull request #17907 from Yosshi999:gsoc_asift-py2cpp	2020-08-03 14:11:55 +00:00
audio_spectrogram.cpp	Merge pull request #20934 from SinM9:spectrogram_samples	2021-12-14 17:33:26 +00:00
barcode.cpp	Merge pull request #23666 from mshabunin:barcode-move	2023-06-14 22:21:38 +03:00
bgfg_segm.cpp	samples: use findFile() in "cpp"	2018-11-16 18:08:22 +00:00
calibration.cpp	Merge pull request #23486 from vovka643:4.x_calibration_with_aruco	2023-04-26 12:13:16 +03:00
camshiftdemo.cpp	using argv[0] represent binary executable files' name in help() function	2020-02-28 20:36:56 +08:00
cloning_demo.cpp	samples: use findFile() in "cpp"	2018-11-16 18:08:22 +00:00
cloning_gui.cpp	samples: use findFile() in "cpp"	2018-11-16 18:08:22 +00:00
CMakeLists.txt	Revert "suppress warning on GCC 7 and later"	2022-08-07 15:43:10 +03:00
connected_components.cpp	samples: use findFile() in "cpp"	2018-11-16 18:08:22 +00:00
contours2.cpp	using argv[0] represent binary executable files' name in help() function	2020-02-28 20:36:56 +08:00
convexhull.cpp	Update convexhull.cpp	2021-09-11 23:58:14 +03:00
cout_mat.cpp	using argv[0] represent binary executable files' name in help() function	2020-02-28 20:36:56 +08:00
create_mask.cpp	Update samples	2020-07-23 20:09:37 +03:00
dbt_face_detection.cpp	samples: use findFile() in "cpp"	2018-11-16 18:08:22 +00:00
delaunay2.cpp	using argv[0] represent binary executable files' name in help() function	2020-02-28 20:36:56 +08:00
demhist.cpp	Update Samples	2019-09-05 01:10:51 +03:00
detect_blob.cpp	fix 4.x links	2021-12-22 13:24:30 +00:00
detect_mser.cpp	Merge remote-tracking branch 'upstream/3.4' into merge-3.4	2020-03-04 20:49:09 +00:00
dft.cpp	Update Samples	2019-09-05 01:10:51 +03:00
digits_lenet.cpp	add OpenCV sample for digit and text recongnition, and provide multiple OCR models.	2020-08-22 01:02:13 +08:00
digits_svm.cpp	Add namespace specifier for format()	2021-04-21 14:08:52 +08:00
dis_opticalflow.cpp	Update samples	2019-09-20 18:03:26 +03:00
distrans.cpp	using argv[0] represent binary executable files' name in help() function	2020-02-28 20:36:56 +08:00
drawing.cpp	using argv[0] represent binary executable files' name in help() function	2020-02-28 20:36:56 +08:00
edge.cpp	using argv[0] represent binary executable files' name in help() function	2020-02-28 20:36:56 +08:00
ela.cpp	Update samples	2019-09-20 18:03:26 +03:00
em.cpp	Updated ml module interfaces and documentation	2015-02-17 11:46:14 +03:00
epipolar_lines.cpp	Merge pull request #17683 from ivashmak:homography	2020-08-14 22:42:26 +00:00
essential_mat_reconstr.cpp	Update essential_mat_reconstr.cpp	2021-01-18 23:56:34 +08:00
facedetect.cpp	Merge pull request #23108 from crackwitz:issue-23107	2023-01-09 09:55:31 +00:00
facial_features.cpp	fix 4.x links	2021-12-22 13:24:30 +00:00
falsecolor.cpp	Fix trackbar in falsecolor cpp sample	2021-11-06 10:11:58 +00:00
fback.cpp	using argv[0] represent binary executable files' name in help() function	2020-02-28 20:36:56 +08:00
ffilldemo.cpp	using argv[0] represent binary executable files' name in help() function	2020-02-28 20:36:56 +08:00
fitellipse.cpp	Change article for fitEllipseDirect function	2025-01-07 22:24:48 +03:00
flann_search_dataset.cpp	Merge pull request #17643 from pemmanuelviel:pev--new-flann-demo	2020-08-10 13:26:40 +00:00
grabcut.cpp	Updated grabcut example to show the background in a transparant way	2021-07-14 22:02:27 +02:00
image_alignment.cpp	using argv[0] represent binary executable files' name in help() function	2020-02-28 20:36:56 +08:00
imagelist_creator.cpp	update cpp samples and tutorials	2016-06-26 20:55:00 +03:00
imagelist_reader.cpp	Merge pull request #13188 from alalek:samples_rename	2018-11-17 00:35:05 +03:00
imgcodecs_jpeg.cpp	build: fix warnings	2022-07-02 00:56:10 +03:00
inpaint.cpp	Update Samples	2019-09-05 01:10:51 +03:00
intelligent_scissors.cpp	Merge pull request #16853 from SimpleVlad:note	2020-03-19 21:39:54 +00:00
intersectExample.cpp	Update samples	2020-07-23 20:09:37 +03:00
kalman.cpp	Merge pull request #20564 from AleksandrPanov:update_kalman_sample	2021-08-20 10:57:05 +00:00
kmeans.cpp	Merge pull request #10258 from savuor:fix/kmeans_channels	2017-12-15 21:48:48 +03:00
laplace.cpp	using argv[0] represent binary executable files' name in help() function	2020-02-28 20:36:56 +08:00
letter_recog.cpp	using argv[0] represent binary executable files' name in help() function	2020-02-28 20:36:56 +08:00
lkdemo.cpp	Merge pull request #9618 from vipinanand4:goodFeaturesToTrack_added_gradiantSize	2017-09-22 14:04:43 +00:00
logistic_regression.cpp	ml: use OpenCV license header for logistic regression	2021-03-17 20:29:52 +00:00
lsd_lines.cpp	restore LSD	2021-10-01 16:23:16 +03:00
mask_tmpl.cpp	Backport C-API cleanup (imgproc) from 5.x	2023-01-16 23:29:50 +03:00
matchmethod_orb_akaze_brisk.cpp	fix 4.x links	2021-12-22 13:24:30 +00:00
minarea.cpp	samples: use findFile() in "cpp"	2018-11-16 18:08:22 +00:00
morphology2.cpp	using argv[0] represent binary executable files' name in help() function	2020-02-28 20:36:56 +08:00
neural_network.cpp	Issue 6780	2016-07-07 09:29:41 +02:00
npr_demo.cpp	samples: use findFile() in "cpp"	2018-11-16 18:08:22 +00:00
opencv_version.cpp	Minor refactoring in several C++ samples:	2018-03-06 14:23:20 +03:00
pca.cpp	Merge pull request #23108 from crackwitz:issue-23107	2023-01-09 09:55:31 +00:00
peopledetect.cpp	Update Samples	2019-09-05 01:10:51 +03:00
phase_corr.cpp	update samples: waitKey() usage	2016-12-15 15:39:47 +03:00
points_classifier.cpp	samples: use findFile() in "cpp"	2018-11-16 18:08:22 +00:00
polar_transforms.cpp	Update Samples	2019-09-05 01:10:51 +03:00
qrcode.cpp	added graphicalCodeDetector, remove QRCodeDetectorBase	2023-06-08 14:50:58 +03:00
segment_objects.cpp	using argv[0] represent binary executable files' name in help() function	2020-02-28 20:36:56 +08:00
select3dobj.cpp	Merge pull request #22149 from seanm:sprintf	2022-06-25 06:48:22 +03:00
simd_basic.cpp	Clean up the Universal Intrinsic API.	2023-10-13 19:23:30 +08:00
smiledetect.cpp	Update Samples	2019-09-05 01:10:51 +03:00
squares.cpp	Fix squares sample failure when a single file passed	2021-04-28 09:36:04 +03:00
stereo_calib.cpp	added aruco pattern into stereo_calibration.cpp	2023-05-16 12:22:03 +03:00
stereo_match.cpp	Update the stereo sample:	2020-08-20 12:20:25 +02:00
stitching_detailed.cpp	Merge remote-tracking branch 'upstream/3.4' into merge-3.4	2020-04-24 19:02:39 +00:00
stitching.cpp	Changed sample code, fixes #18807	2020-11-14 23:29:51 +02:00
text_skewness_correction.cpp	Added tutorial for text skewness correction in C++ and Python.	2020-01-23 08:24:39 +03:00
train_HOG.cpp	Merge pull request #23109 from seanm:misc-warnings	2023-10-06 13:33:21 +03:00
train_svmsgd.cpp	Fix some clang 14 warnings	2023-02-07 01:19:00 +03:00
travelsalesman.cpp	Fixed compilation warnings in samples:	2018-02-12 18:42:36 +03:00
tree_engine.cpp	using argv[0] represent binary executable files' name in help() function	2020-02-28 20:36:56 +08:00
videocapture_audio_combination.cpp	Merge pull request #19721 from MaximMilashchenko:Audio	2021-10-20 16:18:24 +03:00
videocapture_audio.cpp	Merge pull request #19721 from MaximMilashchenko:Audio	2021-10-20 16:18:24 +03:00
videocapture_basic.cpp	Update videocapture_basic.cpp	2020-04-24 11:42:45 +03:00
videocapture_camera.cpp	samples: videocapture_camera use VideoCapture with 0 index	2018-07-03 15:44:53 +03:00
videocapture_gphoto2_autofocus.cpp	FIx misc. source and comment typos	2019-08-15 13:09:52 +03:00
videocapture_gstreamer_pipeline.cpp	videoio(doc): add 'videoio_hwaccel' group, fix typos	2021-03-07 04:47:22 +00:00
videocapture_image_sequence.cpp	Merge pull request #13188 from alalek:samples_rename	2018-11-17 00:35:05 +03:00
videocapture_microphone.cpp	Merge pull request #19721 from MaximMilashchenko:Audio	2021-10-20 16:18:24 +03:00
videocapture_obsensor.cpp	Merge pull request #24877 from zzuliys:feature/mac	2024-03-29 11:23:41 +03:00
videocapture_openni.cpp	Add tutorial on how to use Orbbec Astra 3D cameras	2020-11-19 13:31:22 +03:00
videocapture_realsense.cpp	New example for realsense	2021-12-16 15:07:53 -03:00
videocapture_starter.cpp	Merge pull request #22149 from seanm:sprintf	2022-06-25 06:48:22 +03:00
videowriter_basic.cpp	samples: avoid using of legacy C-like API	2018-03-26 13:42:35 +03:00
warpPerspective_demo.cpp	Fix some clang 14 warnings	2023-02-07 01:19:00 +03:00
watershed.cpp	Merge pull request #23108 from crackwitz:issue-23107	2023-01-09 09:55:31 +00:00