Hi,
I created SIFT constructor, with Threshold = 100
cv::Ptr<feature2d> f2d = xfeatures2d::SIFT::create(100);
f2d->compute(image, keypoint, descriptor);
Then I extract descriptors from sequence of images and for some images I receive number of keypoints bigger than limit by one. Please see descriptors print below:
[128 x 101]
[128 x 100]
[128 x 100]
[128 x 101]
[128 x 100]
[128 x 100]
[128 x 101]
[128 x 100]
Why does it happen? Do have incorrect understanding of nfeatures attribute?