shithub: ifilter

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-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: image/cfilter -f grayscale|sepia|invert|shade|tint [-r ratio]

-

-Available filters are:

-- grayscale

-- sepia

-- invert

-- shade(1)

-- tint(1)

-

-1: these filters use the ratio argument to determine the transformation ratio.

-

-blur:

------

-blur implements blurring algorithms.

-

-Usage: image/blur -f box|gaussian [-s size]

-

-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*s+1)

-

-pixelate:

----------

-pixelate implements a pixelation algorithm.

-

-Usage: image/pixelate [-s size]

-size is the output pixel size (defaults to 8)

-

-dither:

--------

-Floyd-Steinberg dithering algorithm.

-

-Usage: image/dither

-

-

-Author: phil9

-License: MIT