Paco_87's profile - activity

2016-12-13 04:39:34 -0600	commented answer	MSER operator() is different from FeatureDetector::detect() function? I don't understand how SIFT::detectImpl method works. Can anyone explain me, please?
2016-12-12 03:59:52 -0600	commented answer	SIFT implementation in openCV I understand you. However I have an issue: when I declare "SIFT detector( 100 );" in my main program, I say that I want 100 keypoints in my image. Considering that I specified only one parameter, this instruction calls "operator()" method in sift.cpp file. But here, there's only one instruction: "(*this)(_image, _mask, keypoints, noArray());". What is the meaning?
2016-12-10 10:11:06 -0600	received badge	● Supporter (source)
2016-12-03 06:00:57 -0600	asked a question	SIFT implementation in openCV Hi, I' ve tried to understand sift implementation in opencv. In sift.cpp class there is 'calcSIFTDescriptor' method; here, there are two for cycles: `for( i = 0; i < d+2; i++ ) {...}` and `for( i = -radius, k = 0; i <= radius; i++ ) {...}`. What is their meaning? Also, do you know some web sites or some documents that explain (better than openCV tutorial or refman) how sift algorithm in opencv works?