new_width=200
new_height=200
convert "$1" -resize ${new_width}x${new_height} -colorspace Gray -dither Floyd-Steinberg -monochrome output.jpg
convert "$1" -resize ${new_width}x${new_height} -colorspace Gray -dither Floyd-Steinberg -monochrome output.xbm
convert "$1" -resize ${new_width}x${new_height} -colorspace Gray -ordered-dither o8x8,4 -depth 1 output2.jpg
convert "$1" -resize ${new_width}x${new_height} -colorspace Gray -ordered-dither o8x8,4 -depth 1 output2.xbm