PngSuite - Image filtering / GIF-files

f00n0g08 - grayscale, no interlacing, filter-type 0 f00n2c08 - color, no interlacing, filter-type 0 f01n0g08 - grayscale, no interlacing, filter-type 1 f01n2c08 - color, no interlacing, filter-type 1 f02n0g08 - grayscale, no interlacing, filter-type 2 f02n2c08 - color, no interlacing, filter-type 2 f03n0g08 - grayscale, no interlacing, filter-type 3 f03n2c08 - color, no interlacing, filter-type 3 f04n0g08 - grayscale, no interlacing, filter-type 4 f04n2c08 - color, no interlacing, filter-type 4

Willem van Schaik, Singapore, March 1998 http://www.schaik.com/wwwillem.html