Image downsampling converter

Inspired by 2bit

Usage: python3 2bit.py infile.png [outfile.png] [bits] [--per-color] [--dither dither_value]

dither_value can be like 50%, 50 or .5

Warning: Will probably turn transparency black

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.