Is there a way to use a detectfeatures function without converting an image to grayscale?

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fortyone 2016-2-13

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https://ww2.mathworks.cn/matlabcentral/answers/267998-is-there-a-way-to-use-a-detectfeatures-function-without-converting-an-image-to-grayscale

评论： fortyone 2016-2-15

Hi

I'm trying to write code that will grab features out of a color image, but pretty much all code I see doing this involve first converting the image to grayscale. Right now I'm using detectSURFfeatures for grabbing the features from a grayscale image. However, I was wondering if there's anyway to detect features of an image that is a say NxMx3 or NxMx5 without reducing it to a NxM? It doesn't have to be a detectXXXXfeatures function, anything will do that grabs features out of an image.

Thanks!

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Answer 1

Dima Lisin 2016-2-15

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https://ww2.mathworks.cn/matlabcentral/answers/267998-is-there-a-way-to-use-a-detectfeatures-function-without-converting-an-image-to-grayscale#answer_209899

编辑：Dima Lisin 2016-2-15

Currently, all point feature detectors in the Computer Vision System toolbox work on grayscale images. If you want to somehow use color, you would have to choose an algorithm (such as CSIFT), and then either find an implementation or write it yourself.