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 