ref: dbbdb0ac0c7f7f41541b71d042519b5bdb0b95a8
dir: /README/
ifilter ======= Basic image filters. Filters read an image from standard input, apply a transformation and dumps the resulting image to standard output. ifilter: -------- ifilter implements basic color filters. Usage: cfilter [-f factor] [grayscale|sepia|invert|shade|tint] Available filters are: - grayscale - sepia - invert - shade(1) - tint(1) 1: these filters use the factor argument blur: ----- blur implements blurring algorithms. Available filters are: - box: 3x3 box blur