Feature: weighted Hough Transform #21407
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Fix for png durations and memory leak #26714
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AndroidMediaNdkVideoWriter pixel format enhancement #26698
* videoio(Android): Add source pixel formats RGBA and GRAY to AndroidMediaNdkVideoWriter
Let AndroidMediaNdkVideoWriter::write() deduce source pixel format from matrix type:
CV_8UC3 -> BGR (as before)
CV_8UC4 -> RGBA (use in conjunction with CvCameraViewFrame)
CV_8UC1 -> GRAY
* samples/android/video-recorder: Send images to VideoWriter in RGBA format
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Fix leaks in cv::PngDecoder #26701
Bug: oss-fuzz:386688709
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Animated PNG Support #25715
Continues https://github.com/opencv/opencv/pull/25608
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AndroidMediaNdkCapture pixel format enhancement #26656
### Pull Request Readiness Checklist
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- [x] I agree to contribute to the project under Apache 2 License.
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- [ x] 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.
- [ ] The feature is well documented and sample code can be built with the project CMake
