A simple mosaic generating program
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Python3
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Pillow
Run pymosaic.py
When prompted, either (a) type in the location of the image, or (b) drag and drop the file itself, that you want to be turned into a mosaic
Hit enter
If your inputted file is large then it could take a long time to generate a mosaic. You can reduce the size of the final mosaic (and thus speed up the process) by increasing the value of size_mod in pymosaic.py (default value of 1); the final image will then be scaled by a factor of 1/size_mod
Three .png files are generated:
mosaic_raw.png - the raw (full size) mosaic. This file can be incredibly large!
mosaic.png - a more reasonably sized image, 1/4 of the size of the raw output in each direction
mosaic_thumb.png - a thumbnail of the mosaic