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

I want to calculate the sum of all pixels in rows whose value is 1 in greyscale image

Answer 1

[Alex Mcaulley]

Being im your image:

sum(im==1,2)

[Nupur Goyal]

This code shows but i want to calculate total sum of it

(:,:,1) to (:,:,3)

[Alex Mcaulley]

Then:

sum(sum(im==1,3),2)

[Nupur Goyal]

this also not work

[Alex Mcaulley]

"not work" doesn't help to understand your problem. Clarify what you are expecting and upload your loaded image in a mat file to obtain an useful answer

[Jan]

@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.

[Nupur Goyal]

ok thanku Jan and Alex Mcaulley