How to store the difference between adjacent pixel values of image

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layth ibrahim 2022-4-11

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评论： layth ibrahim 2022-4-15

I have a black and white image and I need to store the value of the differences between each adjacent pixel so that i may plot the values in a histogram.

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layth ibrahim 2022-4-11

Starting from pixel (1,1) after that the difference with the pixel before its position. Sorry, I should have said its grayscale.

layth ibrahim 2022-4-15

Was recently told I need to use a nested "for" loop to acomplish the task.

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回答（2 个）

Benjamin Thompson 2022-4-11

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编辑：Benjamin Thompson 2022-4-11

Use imfilter with a 1D filter argument. If your h is vertical then the difference operation is in the vertical direction. If the filter coefficients h are horizontal then the difference operation is horizontal.

>> imshow(phantom)

>> imshow(imfilter(phantom, [-1 1]))

>> imshow(imfilter(phantom, [-1 1]'))