body_vert_sobel_equalized.png

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   CEO of Monoeye Dating (ceo_of_monoeye_dating@lab.nyanide.com)'s status on Saturday, 21-Oct-2023 03:17:50 JST CEO of Monoeye Dating

   in reply to
   @jeffcliff Moreover, you should be careful to avoid clipping - either up or down - else your image will look smooth when it was not. Ideally you want to be doing these operations in Python with OpenCV and not GIMP, but for your sake let's use GIMP.
   
   Now, let's ignore color maps and do that with this image. Convert to greyscale (I'm going to be sloppy and assume that taking the Luminance is how GIMP converts to greyscale, but I could be wrong), apply the Sobel filter (only horizontal, or only vertical), and equalize. Here we are.
   
   You should see what looks like a lot of mountain ridges in the "body," - which I have described as looking "sinewy." The edges are chaotic, even though this was not quite perceptible to a person before.
   
   Compare that to the smooth surfaces, which are uniform in color. Compare that to the other rough surfaces (like the glove), which - does show such ridges but in a fashion typical of such a rubber glove.
   
   Now, the exercise:
   
   I have only recently, with a fresh pair of eyes, observed another spot in this pair of images which is abnormal in the same fashion as the body. Can you spot it?
   body_horiz_sobel_equalized.png
   body_vert_sobel_equalized.png