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2012-07-06 13:02:01 -0600 | commented answer | Do inputs of descriptor extractors are required to be grayscale? Thanks. That explains it all. |
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2012-07-06 11:15:40 -0600 | asked a question | Do inputs of descriptor extractors are required to be grayscale? Most if not all descriptors extractors (Surf, Orb, etc.) require the input image to be grayscale. Is there a reason? I tried them on color image (RGBA) and it seems that they work just fine. So, do I really need the extra step to convert a RGBA to grayscale to use these extractors? |