Questions tagged [sift]
59 questions
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What is the story behind the story about SIFT descriptor?
The following is from Lowe 2004 paper ( http://www.cs.ubc.ca/~lowe/papers/ijcv04.pdf ).
One obvious approach would be to sample the local image intensities around the keypoint at the appropriate scale, and to match these using a normalized…
jakeoung
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I have a question on SIFT
I am reading a paper on SIFT by Lowe.
In it, gradient magnitudes and orientations are calculated using these formulae:
$$$$
I don't know why m(x,y) is calculated above. I heard that gradient magnitude is usually calculated like the…
jakeoung
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Are there algorithms that can match SIFT's key points of 2 images using their mutual arrangement?
I'm solving image matching task using SIFT as a feature extractor
To match obtained descriptors I used FLANN based Matcher (provided by OpenCV) and result looks good:
But applying same algorithm to different images I still have some "False…
Dmitriy Simonowich
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