1# https://en.wikipedia.org/wiki/Netpbm_format 2header1="P1" 3header2="P2" 4header3="P3" 5header4="P4" 6header5="P5" 7header6="P6" 8zero="0" 9one="1" 10comment="#" 11max="255" 12overflow="256" 13 14# PAM - https://en.wikipedia.org/wiki/Netpbm#PAM_graphics_format 15header7="P7" 16width="WIDTH" 17height="HEIGHT" 18depth="DEPTH" 19maxval="MAXVAL" 20enhdr="ENDHDR" 21tupltype="TUPLTYPE" 22tupltype1="RGB_ALPHA" 23tupltype2="RGB" 24typltype3="BLACKANDWHITE" 25typltype4="BLACKANDWHITE_ALPHA" 26typltype5="GRAYSCALE" 27typltype6="GRAYSCALE_ALPHA" 28maxval_num="65535" 29maxval_overlfow="65536" 30