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Commit 1dfc742f authored by Alexander Alekhin's avatar Alexander Alekhin
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calib3d: chess board - avoid image modification via cvFindContours

parent 8307e06c
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Showing with 4 additions and 2 deletions
modules/calib3d/src/calibinit.cpp
View file @ 1dfc742f
......@@ -497,7 +497,8 @@ int cvFindChessboardCorners( const void* arr, CvSize pattern_size,
int max_quad_buf_size = 0;
cvFree(&quads);
cvFree(&corners);
int quad_count = icvGenerateQuads( &quads, &corners, storage, thresh_img_new, flags, &max_quad_buf_size );
Mat binarized_img = thresh_img_new.clone(); // make clone because cvFindContours modifies the source image
int quad_count = icvGenerateQuads( &quads, &corners, storage, binarized_img, flags, &max_quad_buf_size );
PRINTF("Quad count: %d/%d\n", quad_count, (pattern_size.width/2+1)*(pattern_size.height/2+1));
SHOW_QUADS("New quads", thresh_img_new, quads, quad_count);
if (processQuads(quads, quad_count, pattern_size, max_quad_buf_size, storage, corners, out_corners, out_corner_count, prev_sqr_size))
......@@ -562,7 +563,8 @@ int cvFindChessboardCorners( const void* arr, CvSize pattern_size,
int max_quad_buf_size = 0;
cvFree(&quads);
cvFree(&corners);
int quad_count = icvGenerateQuads( &quads, &corners, storage, thresh_img, flags, &max_quad_buf_size);
Mat binarized_img = (useAdaptive) ? thresh_img : thresh_img.clone(); // make clone because cvFindContours modifies the source image
int quad_count = icvGenerateQuads( &quads, &corners, storage, binarized_img, flags, &max_quad_buf_size);
PRINTF("Quad count: %d/%d\n", quad_count, (pattern_size.width/2+1)*(pattern_size.height/2+1));
SHOW_QUADS("Old quads", thresh_img, quads, quad_count);
if (processQuads(quads, quad_count, pattern_size, max_quad_buf_size, storage, corners, out_corners, out_corner_count, prev_sqr_size))
......
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