How to divide image into X*Y blocks and count number of pixels for each block?

Hi,

I have 4096*3000 rgb image. i want to divide that image into X*Y blocks. I would like to calculate number of pixels in every block. At the end i need to have X*Y matrix, such that every elements in that matrix represents the number of pixels in respective block. How i can do that?

Thanks in advance.

[Guillaume]

Isn't the numbers of pixels in an X pixels * Y pixels block equal to X*Y ?

Perhaps you are asking for the number of pixels that have a given property (e.g. are white) but nowhere have you mentioned that in your question.

Answer 1

[Image Analyst]

Try this:

[rows, columns, numberOfColorChannels] = size(rgbImage);
rowsPerBlock = round(rows / Y)
colsPerBlock = round(columns / X)
pixelsPerBlock = rowsPerBlock  * colsPerBlock

Also see demos for blockproc(), attached.