uwe81

Thank you for the replies. I did not manage to test further hints, but (when I have time) I will try to write my own plugin. There are some Ideas that might heuristically solve the problem * Increase each selection by, e.g. 1 pixel before coloring * Removing stray pixel (each area of connected pixel with less than N pixel), color them by their neighbour color Although i never wrote something related to image processing I am quite experienced in C# and coding of GUIs and mathematical algrorithms. It might be worth a try...

Hello! Thank you for your answers! However, I am not quite happy with these plugins. All of them (including the built-in function) seem to work pixel-wise, i.e. each pixel is rounded to the next color. By this I get artefacts as shown below. To an human it is quite clear that I do not want to have any orange inside the white region on the left, however there are some orange pixels inside...

What am I looking for: I am looking for a plugin that takes an image and reduces the colors to a very small number (e.g. <10). Additionally, large areas should have the same color (i am not interested in single pixel having a different color than the pixels around. Where do I need this: My wife bought an embroidery machine. On the internet we can look for cliparts as embroidery pattern (private usage only). Usually we find an image that looks good. If this image only consists of, lets say, 8 images, everything is fine. We import it into the stitching program, tell the program to stitch the red parts of the image in some way, the green parts in some other way and so on. However, the program relies on the pixel to have EXACTLY the same color. The problem arises, if the image was saved as jpeg or if some antialializing smoothed black borders or something similar. What we did so far: Until now, I worked with gimp, used the function "Threshold" to make a black/white image essentially only containing the black borders and flood-filling everything again. What might be special in my case: I am not interested in single pixels. If, by antialializing, a pixel an a black border of a red area is somewhere between black and red i do not care how the plugin colors it, as long as it is either black or red. However, I do not want small areas of pixels having a different color than its neighbourhood.