mkbitmap 1.14. Copyright (C) 2001-2017 Peter Selinger.

mkbitmap 1.14. Transforms images into bitmaps with scaling and filtering. Usage: mkbitmap [options] [file...] Options: -h, --help - print this help message and exit -v, --version - print version info and exit -l, --license - print license info and exit -o, --output <file> - output to file -x, --nodefaults - turn off default options Inversion: -i, --invert - invert the input (undo 'blackboard' effect) Highpass filtering: -f, --filter <n> - apply highpass filter with radius n (default 4) -n, --nofilter - no highpass filtering -b, --blur <n> - apply lowpass filter with radius n (default: none) Scaling: -s, --scale <n> - scale by integer factor n (default 2) -1, --linear - use linear interpolation -3, --cubic - use cubic interpolation (default) Thresholding: -t, --threshold <n> - set threshold for bilevel conversion (default 0.45) -g, --grey - no bilevel conversion, output a greymap Possible input file formats are: pnm (pbm, pgm, ppm), bmp. The default options are: -f 4 -s 2 -3 -t 0.45