edge pixel frequency of image

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Elysi Cochin
Elysi Cochin 2021-6-5
评论： Image Analyst 2021-6-5
How is edge pixel frequency of an image found?

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Image Analyst
Image Analyst 2021-6-5
I never heard of it. Seems like maybe you have, and that maybe it's defined in some paper. If I had to guess, I'd call imgradient() and threshold to get a map of where edges are. And then get the area fraction of the edge pixels to see what percentage of the entire image it is.
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Elysi Cochin
Elysi Cochin 2021-6-5
In the paper they have not given details or any reference just mentioned, pixel frequency. I am not sure if it is histogram, that's why asked, to confirm
Image Analyst
Image Analyst 2021-6-5
I have no idea. "Pixel frequency" is very vague. Each pixel shows up exactly once in the image so the frequency of every pixel is one over the number of pixels in the image. If you want to group some pixels together, like based on their value or something, then you will get a frequency of occurrence of those values by doing a histogram. I can't really say anymore unless you make it less vague.

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