How can i apply RANSAC on the matched points of the SURF meathod

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aitakin ezzati
aitakin ezzati 2020-10-20
回答： Puru Kathuria 2021-3-14
Hello everyone,
I have a video segemented into frames where i am comparing each frame of the video with a one constant picture.
I am using the method detectSURFFeatures()
How by ploting the matched features on the pictures,i noticed that i have arround 10% of the data that are wrong matches
I have read that the RANSAC method can help removing the outliers but so far, I had not lack to find a good example
here is the code snipped i am using (it might give you a better idea on what i did ) :
fixationImagePoints = detectSURFFeatures(fixationImage);
originalImagePoints = detectSURFFeatures(originalImage);
[fFixationImagePoints, vFixationImagePoints] = extractFeatures(fixationImage, fixationImagePoints);
[fOriginalImagePoints, vOriginalImagePoints] = extractFeatures(originalImage, originalImagePoints);
indexPairs = matchFeatures(fFixationImagePoints, fOriginalImagePoints) ;
fixationImageMatchedPoints = vFixationImagePoints(indexPairs(:, 1));
originalImageMatchedPoints = vOriginalImagePoints(indexPairs(:, 2));
Hopefully someone here can give me a clue on how to use the RANSAC or give me a different approache.
Thanks in advance.

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回答（1 个）

Puru Kathuria
Puru Kathuria 2021-3-14
Hi,
You might want to look at this video tutorial which explains feature detection, extraction, and matching followed by an estimation of the geometric transformation using the RANSAC algorithm.

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