Defining a ROI for feature extraction rather than rectangle
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I'm using points = detectSURFFeatures(I) for feature detection. I can use a rectangular ROI with this funstion in the format of [x y w h], however I need to use an arbitory ROI(from a mask with out any typical shape). Is it possible to use detectSURFFeatures function with an arbitory ROI?? The resean is that when I chose rectangle still there are some locations that are inrelavant. Any help would be appreciated.
Qu Cao on 17 May 2021
Unfortunately, rectangle is the only type of ROI supported. As a workaround, you can define multiple ROIs in your image to cover the relevant area, extract feature points separately, and then combine the points.