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templatematch: Match rectangle grows redder with increased match certainty

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This is useful for debugging your matches as it indicates how certain the
match was in addition to its position.
This commit is contained in:
William Manley 2012-06-20 15:22:52 +01:00 committed by Thiago Santos
parent b608767288
commit 88cb33a1dc
1 changed files with 12 additions and 2 deletions
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14
ext/opencv/gsttemplatematch.c
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@ -370,13 +370,23 @@ gst_template_match_chain (GstPad * pad, GstObject * parent, GstBuffer * buf)
if (filter->display) {
CvPoint corner = best_pos;
CvScalar color;
if (filter->method == CV_TM_SQDIFF_NORMED
|| filter->method == CV_TM_CCORR_NORMED
|| filter->method == CV_TM_CCOEFF_NORMED) {
/* Yellow growing redder as match certainty approaches 1.0. This can
only be applied with method == *_NORMED as the other match methods
aren't normalized to be in range 0.0 - 1.0 */
color = CV_RGB (255, 255 - pow (255, best_res), 32);
} else {
color = CV_RGB (255, 32, 32);
}
buf = gst_buffer_make_writable (buf);
corner.x += filter->cvTemplateImage->width;
corner.y += filter->cvTemplateImage->height;
cvRectangle (filter->cvImage, best_pos, corner, CV_RGB (255, 32, 32), 3,
8, 0);
cvRectangle (filter->cvImage, best_pos, corner, color, 3, 8, 0);
}
}