How to find sum of all pixels in rows whose value is 1 ?

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Nupur Goyal
Nupur Goyal 2019-7-1
评论： Nupur Goyal 2019-7-1
I want to calculate the sum of all pixels in rows whose value is 1 in greyscale image

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Alex Mcaulley
Alex Mcaulley 2019-7-1
Being im your image:
sum(im==1,2)
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Jan
Jan 2019-7-1
@Nupur Goyal: "not work" is not a usefulö description of the problem. Please do not let the readers guess, what the problem is.
Grey scale images do not have 3 dimensions. So "(:,:,1) to (:,:,3)" means, that you do not have a grey scale image.
Alex's answer contains all you need: im==1 to get the indices and sum() to calculate the sum. Please try to combine these command until you get, what you want.

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