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

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user06 2015-1-12

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https://ww2.mathworks.cn/matlabcentral/answers/169618-how-to-find-the-histogram-of-the-each-blocks-of-the-gray-image-that-is-divided-into-4-parts

回答： Image Analyst 2015-1-12

采纳的回答： sachit

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

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Answer 1

sachit 2015-1-12

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https://ww2.mathworks.cn/matlabcentral/answers/169618-how-to-find-the-histogram-of-the-each-blocks-of-the-gray-image-that-is-divided-into-4-parts#answer_164631

use "imhist" command for every block.

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user06 2015-1-12

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.?

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Answer 2

Image Analyst 2015-1-12

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https://ww2.mathworks.cn/matlabcentral/answers/169618-how-to-find-the-histogram-of-the-each-blocks-of-the-gray-image-that-is-divided-into-4-parts#answer_164640

在 MATLAB Online 中打开

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