Is the example image ( https://github.com/worldveil/photomosaic/blob/master/media/r... ) with or without opacity cheat?
Yeah that's using opacity, e.g. there's an image of a blue horizon that gets tinted red.
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Is the example image ( https://github.com/worldveil/photomosaic/blob/master/media/r... ) with or without opacity cheat?
I'm not an expert in the topic, but my understanding is RGB is a poor color space for computing color difference. This could be why your mosaics end up so washed out. [1] suggests using a CIELAB color space [2]. Edit: Looking at the code more closely it looks like you were using Lab at one point but commented it out[3], so I'm guessing you're already aware of this. 1: https://stackoverflow.com/a/9019461/185171 2: htt…
It didn’t make a ton of difference empirically when I tried it. But you’re correct, generally that’s the space you want to be in.