how to find the histogram of the each blocks of the gray image that is divided into 4 parts?

there are 4 blocks , and i want the histogram of these 4 blocks.

Answer 1

[sachit]

use "imhist" command for every block.

[user06]

ho we can use "imhist" to each block.? i have divided the the image into the blocks then how can i use "imhist"to each block can u plz give an example.?

Answer 2

[Image Analyst]

[pixelCounts1, grayLevels1] = imhist(block1);
[pixelCounts2, grayLevels2] = imhist(block2);
[pixelCounts3, grayLevels3] = imhist(block3);
[pixelCounts4, grayLevels4] = imhist(block4);