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A modified pngnq: convert png images to 256 colours.
pngnq-s9 is a modified version of pngnq, the neural network colour quantizer for png images.
Like pngnq, pngnq-s9 takes a full 32 bit RGBA png image, selects a palette of up to 256 colours, and then redraws the image in 8 bit indexed mode. The resulting image can be up to 70% smaller than the original.
pngnq-s9 adds several new options to pngnq including the ability to augment a user-supplied palette, the ability to quantize in the YUV colour space, and the ability to give more or...
Qt Applet for color conversion between different spaces (XYZ, xyz, L*U*V*, LAB (Hunter), L*A*B*, RGB, sRGB, Adobe RGB, YIQ, Y'UV). Gives the color for a Black Body at a given temperature. Plots the chromaticity diagram and gives an approximation of the dominant wavelength and purity. Plots the histograms for an input image in a given color space.