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Merge pull request #27657 from asmorkalov:as/fast_buffer_size

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Added heuristic to allocate buffer for FAST features depending on input image resolution
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Alexander Smorkalov 2025-08-12 13:29:26 +03:00 committed by GitHub
commit 2ecc22fe03
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1 changed files with 4 additions and 2 deletions
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6
modules/features2d/src/fast.cpp
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@ -429,8 +429,10 @@ void FAST(InputArray _img, std::vector<KeyPoint>& keypoints, int threshold, bool
{
CV_INSTRUMENT_REGION();
const size_t max_fast_features = std::max(_img.total()/100, size_t(1000)); // Simple heuristic that depends on resolution.
CV_OCL_RUN(_img.isUMat() && type == FastFeatureDetector::TYPE_9_16,
ocl_FAST(_img, keypoints, threshold, nonmax_suppression, 10000));
ocl_FAST(_img, keypoints, threshold, nonmax_suppression, (int)max_fast_features));
cv::Mat img = _img.getMat();
CALL_HAL(fast_dense, hal_FAST, img, keypoints, threshold, nonmax_suppression, type);
@ -446,7 +448,7 @@ void FAST(InputArray _img, std::vector<KeyPoint>& keypoints, int threshold, bool
return;
} else {
free(kps);
keypoints_count = 10000;
keypoints_count = max_fast_features;
keypoints.clear();
keypoints.resize(keypoints_count);
CALL_HAL(fast, cv_hal_FAST, img.data, img.step, img.cols, img.rows,