16 lines
872 B
Markdown
16 lines
872 B
Markdown
# Image downsampling converter
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Inspired by [2bit](http://2bit.neocities.org/)
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Usage: `python3 2bit.py infile.png [outfile.png] [bits] [--per-color] [--dither dither_value] [--non-random-dither num_pixels]`
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You can change the number of bits for different results. 1 would be just black and white, while 8 would be the original image in greyscale.
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dither\_value can be like `50%`, `50`, `.5` or `auto`
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Note that using `--non-random-dither` without a dither argument will attempt to guess what dither percentage you want based on the number of bits
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The best number for num\_pixels varies with the image. In general, the height of the image modulo num\_pixels + 1 should not equal zero. Experiment with it. Using `auto` will try to guess a good value such that you don't get horizontal bars, but it's not very good at it.
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Warning: Will probably turn transparency black
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