![]() I will say that the results appear more "dithered" than the same results in Photoshop with the n color ACT color table in the link you provided. I have attached a gif (4px wide by 28 pixels tall) of these 7 colors for your use. Where "original_image.png" is the full-color image you want to dither, "dithered_image.gif" is the dithered output of the operation, and "colortable.gif" is a gif image that contains 7 patches of color with the listed colors above - it instructs the algorithm to reduce the original image to a dithered one using only those colors. ![]() You can perform Floyd-Steinberg dithering in ImageMagick using the following command:Ĭonvert original_image.png -dither FloydSteinberg -remap colortable.gif dithered_image.gif The seven RGB colors in the color table are:
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