How to find the difference of adjacent pixels in an image? Thanks

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Jab
Jab 2016-8-4
评论： Image Analyst 2017-3-27
How to find the difference of adjacent pixels in an image? Thanks

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Image Analyst
Image Analyst 2016-8-4
In which direction? Assuming left and right, you can use conv2() or imfilter():
img = imread('moon.tif');
diffImage = imfilter(img, [1, -1]);
imshow(diffImage, [])
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Image Analyst
Image Analyst 2017-3-27
That would have been helpful to know in advance. I have no time to program this up for you but it's very similar to my local binary pattern demo where I get the values in a circle around the pixel like that. You just have to add or subtract them rather than take them as a binary number. See attached demo.

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