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How to find the pixel value of the center pixel and the maximum pixel value difference of the image?

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I want to extract a couple of properties from an image, They are:
1) Pixel value of the center pixel
2) Maximum pixel value difference of the image.
I tried impixel for the first part but I don't get any value. Any suggestions would be appreciated. Thank you.

Accepted Answer

Image Analyst
Image Analyst on 30 Sep 2022
Try this
[rows, columns, numberOfColorChannels] = size(yourImage);
% Find location of the center pixel.
middleRow = round(rows/2);
middleColumn = round(columns/2);
% Get its gray level.
centerPixelValue = yourImage(middleRow, middleColumn, :)
To get the max pixel value difference over the whole image do
maxGrayLevelRange = range(yourImage, 'all')

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