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a25132986a
Reworked findContours to reduce C-API usage #25146 What is done: * rewritten `findContours` and `icvApproximateChainTC89` using C++ data structures * extracted LINK_RUNS mode to separate new public functions - `findContoursLinkRuns` (it uses completely different algorithm) * ~added new public `cv::approximateChainTC89`~ - **❌ decided to hide it** * enabled chain code output (method = 0, no public enum value for this in C++ yet) * kept old function as `findContours_old` (exported, but not exposed to user) * added more tests for findContours (`test_contours_new.cpp`), some tests compare results of old function with new one. Following tests have been added: * contours of random rectangle * contours of many small (1-2px) blobs * contours of random noise * backport of old accuracy test * separate test for LINK RUNS variant What is left to be done (can be done now or later): * improve tests: * some tests have limited verification (e.g. only verify contour sizes) * perhaps reference data can be collected and stored * maybe more test variants can be added (?) * add enum value for chain code output and a method of returning starting points (e.g. first 8 elements of returned `vector<uchar>` can represent 2 int point coordinates) * add documentation for new functions - **✔️ DONE** * check and improve performance (my experiment showed 0.7x-1.1x some time ago) * remove old functions completely (?) * change contour return order (BFS) or allow to select it (?) * return result tree as-is (?) (new data structures should be exposed, bindings should adapt) |
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| detail | ||
| hal | ||
| bindings.hpp | ||
| imgproc_c.h | ||
| imgproc.hpp | ||
| segmentation.hpp | ||
| types_c.h | ||