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imsubtract(data(:,:,1), rgb2gray(data));

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Manoj Murali 2012-1-24

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采纳的回答： Sean de Wolski

imsubtract(data(:,:,1), rgb2gray(data));

how does the above function work??i know the operation of imsubtract in general.Here i dont understand the part "data(:,:,1)" where 'data' is an image and what does "(:,:,1)" specify here??plz anyone respond to this and give me answer as soon as possible..thankyou

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Sean de Wolski 2012-1-24

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data(:,:,1) specifies the first three dimensional slice of data. In an RGB image, this would be the R slice (plane).

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David Young 2012-1-24

Have a look at http://www.mathworks.co.uk/help/techdoc/ref/colon.html

David Young 2012-1-24

... and also www.mathworks.co.uk/help/techdoc/math/f1-85462.html

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