PngSuite - Ancillary chunks / GIF-files



    ccwn2c08 - chroma chunk w:0.3127,0.3290 r:0.64,0.33 g:0.30,0.60 b:0.15,0.06
    ccwn3p08 - chroma chunk w:0.3127,0.3290 r:0.64,0.33 g:0.30,0.60 b:0.15,0.06
    cdfn2c08 - physical pixel dimensions, 8x32 flat pixels
    cdhn2c08 - physical pixel dimensions, 32x8 high pixels
    cdsn2c08 - physical pixel dimensions, 8x8 square pixels
    cdun2c08 - physical pixel dimensions, 1000 pixels per 1 meter
    ch1n3p04 - histogram 15 colors
    ch2n3p08 - histogram 256 colors
    cm0n0g04 - modification time, 01-jan-2000 12:34:56
    cm7n0g04 - modification time, 01-jan-1970 00:00:00
    cm9n0g04 - modification time, 31-dec-1999 23:59:59
    cs3n2c16 - color, 13 significant bits
    cs3n3p08 - paletted, 3 significant bits
    cs5n2c08 - color, 5 significant bits
    cs5n3p08 - paletted, 5 significant bits
    cs8n2c08 - color, 8 significant bits (reference)
    cs8n3p08 - paletted, 8 significant bits (reference)
    ct0n0g04 - no textual data
    ct1n0g04 - with textual data
    ctzn0g04 - with compressed textual data
    cten0g04 - international UTF-8, english
    ctfn0g04 - international UTF-8, finnish
    ctgn0g04 - international UTF-8, greek
    cthn0g04 - international UTF-8, hindi
    ctjn0g04 - international UTF-8, japanese
    exif2c08 - chunk with jpeg exif data


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Willem van Schaik, Calgary, April 2011 http://www.schaik.com/wwwillem.html