ref: bf1934aa4a1bbc6b13d8008c4a044a0d66dbadb7
dir: /README/
ifilter ======= Basic image filters. Filters read an image from standard input, apply a transformation and dumps the resulting image to standard output. cfilter: -------- cfilter 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. Usage: blur [-s size] [box|pixelate] Available filters are: - box: 3x3 box blur - gaussian: Gaussian blur using `-s` as the convolution kernel radius (ie kernel will be a matrix r*r with r=2*size+1) - pixelate: a simple pixelation filter using `-s` argument as pixel size