Here I put some images to compare : Quantized image: which colors assigned to each region based on closeness to the palette colors. Recolored by art Deco, and barn colors, where recoloring uses edge weights (color difference) to make decision. Recoloring using edge weights of the quantized image. Observation: color assignments seems doing a better job when palette color differences affected edge weights. Original region colors:
Left to right, showing the histogram of edge differences on original colors, quantized barn colors and quantized art Deco poster.
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