Implement fast guided filter #3623
Merged
+144
−28
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This PR implements fast guided filter. The concept is explained in this paper.
TLDR:
Added a 'scale' parameter to the current guided filter interface, allowing resampling inside the algorithm, to speed up computation. The resampling has to be done inside guided filter because the intermediate result has to be combined with original input to generate the final result.
The performance and behavior of the default code path (scale == 1.0) is unaltered. before vs after
Pull Request Readiness Checklist
See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request
- [ ] There is a reference to the original bug report and related workPatch to opencv_extra has the same branch name.