How to divide an image into regions or grids and then calculate the number of pixels in each grid or region?

I have a binary image. I want to divide it into regions or grids and then calculate the number of pixels in each region. Can I do this without using ROI?

[KALYAN ACHARJYA]

Divide into grids, all grid have same sizes??

[Suyog Pathare]

Yes, all of the same size

[Suyog Pathare]

I was able to add a grid on the image. I need to know if I can calculate the number of white pixels in each grid.

[KALYAN ACHARJYA]

I have answered this in your other question

Answer 1

[KSSV]

https://in.mathworks.com/matlabcentral/answers/362262-i-have-a-32-32-matrix-i-want-to-take-mean-of-each-4-4-so-that-the-matrix-is-reduced-to-8-8-array#answer_286773