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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calib3d	Merge pull request #23018 from stopmosk:move-aruco-tutorial	2024-02-26 14:57:46 +03:00
core	Merge pull request #26260 from sturkmen72:upd_doc_4_x	2024-10-09 09:09:51 +03:00
features2D	Add more references. Update missing references with webarchive. Use mathbf for matrices. Check that the determinant of the rotation matrix is not negative (reflection), and correct it if it is the case.	2022-06-19 01:27:32 +02:00
gapi	Merge pull request #21157 from alexgiving:atrutnev/move_resize	2021-12-29 15:13:43 +00:00
gpu	Fix configuring with CMake version 4	2025-04-02 13:45:08 -07:00
HighGUI	Merge pull request #26524 from MurtazaSaherwala:DocumentationUpdation	2024-12-09 16:23:07 +03:00
Histograms_Matching	Merge pull request #23442 from LaurentBerger:tuto_findFile	2023-04-06 13:02:00 +03:00
imgcodecs	Merge pull request #25608 from sturkmen72:animated_webp_support	2024-12-20 13:06:28 +03:00
ImgProc	Merge pull request #23442 from LaurentBerger:tuto_findFile	2023-04-06 13:02:00 +03:00
ImgTrans	Merge pull request #26815 from shyama7004:fix-deprecation	2025-01-22 13:53:59 +03:00
introduction	Merge pull request #16889 from mehlukas:3.4-consolidateImshow	2020-04-07 14:14:51 +00:00
ml	Update Samples	2019-09-05 01:10:51 +03:00
objectDetection	Merge pull request #26815 from shyama7004:fix-deprecation	2025-01-22 13:53:59 +03:00
photo	Merge pull request #27396 from abhishek-gola:hdr_bug_fix	2025-06-05 09:02:58 +03:00
ShapeDescriptors	Update Samples	2019-09-05 01:10:51 +03:00
snippets	Enhance cv::TickMeter to be able to get the last ellapsed time	2024-09-28 12:24:36 +02:00
TrackingMotion	build: eliminate build warnings	2021-08-28 17:11:26 +00:00
video	Update optical_flow.cpp	2025-02-11 13:30:48 +03:00
videoio	Merge pull request #25813 from kaingwade:orbbec-astra	2024-07-01 10:55:35 +03:00
xfeatures2D	Update Samples	2019-09-05 01:10:51 +03:00