I have used SIFT to locate keypoints in some garbage part collected in ocean. How can i automatically calculate area of all garbage only? In the given figure blue points are the keypoints formed through SIFT algorithm. I'm new to matlab.
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Try a different aproach: extract the blue channel from your image and then segment out the garbage – Jeru Luke Apr 28 '17 at 06:45
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"Area" as in pixel area right? not real life area. – Ander Biguri Apr 28 '17 at 07:10
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try using the otsu threshold and calculate the contour area – Alvar Apr 28 '17 at 07:21