mirror of
https://github.com/opencv/opencv.git
synced 2025-07-20 19:17:36 +08:00
d83df66ff0
Find contours speedup #26834 It is an attempt, as suggested by #26775, to restore lost speed when migrating `findContours()` implementation from C to C++ The patch adds an "Arena" (a pool) of pre-allocated memory so that contours points (and TreeNodes) can be picked from the Arena. The code of `findContours()` is mostly unchanged, the arena usage being implicit through a utility class Arena::Item that provides C++ overloaded operators and construct/destruct logic. As mentioned in #26775, the contour points are allocated and released in order, and can be represented by ranges of indices in their arena. No range subset will be released and drill a hole, that's why the internal representation as a range of indices makes sense. The TreeNodes use another Arena class that does not comply to that range logic. Currently, there is a significant improvement of the run-time on the test mentioned in #26775, but it is still far from the `findContours_legacy()` performance. - [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 - [ ] 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 |
||
|---|---|---|
| .. | ||
| doc | ||
| include/opencv2 | ||
| misc | ||
| perf | ||
| src | ||
| test | ||
| CMakeLists.txt | ||