%!PS-Adobe-2.0
%%Version: 0.1
%%DocumentFonts: (atend)
%%Pages: (atend)
%%EndComments
%
% Version 3.3.2 prologue for troff files.
%

/#copies 1 store
/aspectratio 1 def
/formsperpage 1 def
/landscape false def
/linewidth .3 def
/magnification 1 def
/margin 0 def
/orientation 0 def
/resolution 720 def
/rotation 1 def
/xoffset 0 def
/yoffset 0 def

/roundpage true def
/useclippath true def
/pagebbox [0 0 612 792] def

/R  /Times-Roman def
/I  /Times-Italic def
/B  /Times-Bold def
/BI /Times-BoldItalic def
/H  /Helvetica def
/HI /Helvetica-Oblique def
/HB /Helvetica-Bold def
/HX /Helvetica-BoldOblique def
/CW /Courier def
/CO /Courier def
/CI /Courier-Oblique def
/CB /Courier-Bold def
/CX /Courier-BoldOblique def
/PA /Palatino-Roman def
/PI /Palatino-Italic def
/PB /Palatino-Bold def
/PX /Palatino-BoldItalic def
/Hr /Helvetica-Narrow def
/Hi /Helvetica-Narrow-Oblique def
/Hb /Helvetica-Narrow-Bold def
/Hx /Helvetica-Narrow-BoldOblique def
/KR /Bookman-Light def
/KI /Bookman-LightItalic def
/KB /Bookman-Demi def
/KX /Bookman-DemiItalic def
/AR /AvantGarde-Book def
/AI /AvantGarde-BookOblique def
/AB /AvantGarde-Demi def
/AX /AvantGarde-DemiOblique def
/NR /NewCenturySchlbk-Roman def
/NI /NewCenturySchlbk-Italic def
/NB /NewCenturySchlbk-Bold def
/NX /NewCenturySchlbk-BoldItalic def
/ZD /ZapfDingbats def
/ZI /ZapfChancery-MediumItalic def
/S  /S def
/S1 /S1 def
/GR /Symbol def

/inch {72 mul} bind def
/min {2 copy gt {exch} if pop} bind def

/setup {
	counttomark 2 idiv {def} repeat pop

	landscape {/orientation 90 orientation add def} if
	/scaling 72 resolution div def
	linewidth setlinewidth
	1 setlinecap

	pagedimensions
	xcenter ycenter translate
	orientation rotation mul rotate
	width 2 div neg height 2 div translate
	xoffset inch yoffset inch neg translate
	margin 2 div dup neg translate
	magnification dup aspectratio mul scale
	scaling scaling scale

	addmetrics
	0 0 moveto
} def

/pagedimensions {
	useclippath userdict /gotpagebbox known not and {
		/pagebbox [clippath pathbbox newpath] def
		roundpage currentdict /roundpagebbox known and {roundpagebbox} if
	} if
	pagebbox aload pop
	4 -1 roll exch 4 1 roll 4 copy
	landscape {4 2 roll} if
	sub /width exch def
	sub /height exch def
	add 2 div /xcenter exch def
	add 2 div /ycenter exch def
	userdict /gotpagebbox true put
} def

/addmetrics {
	/Symbol /S null Sdefs cf
	/Times-Roman /S1 StandardEncoding dup length array copy S1defs cf
} def

/pagesetup {
	/page exch def
	currentdict /pagedict known currentdict page known and {
		page load pagedict exch get cvx exec
	} if
} def

/decodingdefs [
	{counttomark 2 idiv {y moveto show} repeat}
	{neg /y exch def counttomark 2 idiv {y moveto show} repeat}
	{neg moveto {2 index stringwidth pop sub exch div 0 32 4 -1 roll widthshow} repeat}
	{neg moveto {spacewidth sub 0.0 32 4 -1 roll widthshow} repeat}
	{counttomark 2 idiv {y moveto show} repeat}
	{neg setfunnytext}
] def

/setdecoding {/t decodingdefs 3 -1 roll get bind def} bind def

/w {neg moveto show} bind def
/m {neg dup /y exch def moveto} bind def
/done {/lastpage where {pop lastpage} if} def

/f {
	dup /font exch def findfont exch
	dup /ptsize exch def scaling div dup /size exch def scalefont setfont
	linewidth ptsize mul scaling 10 mul div setlinewidth
	/spacewidth ( ) stringwidth pop def
} bind def

/changefont {
	/fontheight exch def
	/fontslant exch def
	currentfont [
		1 0
		fontheight ptsize div fontslant sin mul fontslant cos div
		fontheight ptsize div
		0 0
	] makefont setfont
} bind def

/sf {f} bind def

/cf {
	dup length 2 idiv
	/entries exch def
	/chtab exch def
	/newencoding exch def
	/newfont exch def

	findfont dup length 1 add dict
	/newdict exch def
	{1 index /FID ne {newdict 3 1 roll put}{pop pop} ifelse} forall

	newencoding type /arraytype eq {newdict /Encoding newencoding put} if

	newdict /Metrics entries dict put
	newdict /Metrics get
	begin
		chtab aload pop
		1 1 entries {pop def} for
		newfont newdict definefont pop
	end
} bind def

%
% A few arrays used to adjust reference points and character widths in some
% of the printer resident fonts. If square roots are too high try changing
% the lines describing /radical and /radicalex to,
%
%	/radical	[0 -75 550 0]
%	/radicalex	[-50 -75 500 0]
%
% Move braceleftbt a bit - default PostScript character is off a bit.
%

/Sdefs [
	/bracketlefttp		[201 500]
	/bracketleftbt		[201 500]
	/bracketrighttp		[-81 380]
	/bracketrightbt		[-83 380]
	/braceleftbt		[203 490]
	/bracketrightex		[220 -125 500 0]
	/radical		[0 0 550 0]
	/radicalex		[-50 0 500 0]
	/parenleftex		[-20 -170 0 0]
	/integral		[100 -50 500 0]
	/infinity		[10 -75 730 0]
] def

/S1defs [
	/underscore		[0 80 500 0]
	/endash			[7 90 650 0]
] def
%
% Tries to round clipping path dimensions, as stored in array pagebbox, so they
% match one of the known sizes in the papersizes array. Lower left coordinates
% are always set to 0.
%

/roundpagebbox {
    7 dict begin
	/papersizes [8.5 inch 11 inch 14 inch 17 inch] def

	/mappapersize {
		/val exch def
		/slop .5 inch def
		/diff slop def
		/j 0 def
		0 1 papersizes length 1 sub {
			/i exch def
			papersizes i get val sub abs
			dup diff le {/diff exch def /j i def} {pop} ifelse
		} for
		diff slop lt {papersizes j get} {val} ifelse
	} def

	pagebbox 0 0 put
	pagebbox 1 0 put
	pagebbox dup 2 get mappapersize 2 exch put
	pagebbox dup 3 get mappapersize 3 exch put
    end
} bind def

%%EndProlog
%%BeginSetup
mark
%
% Encoding vector and redefinition of findfont for the ISO Latin1 standard.
% The 18 characters missing from ROM based fonts on older printers are noted
% below.
%

/ISOLatin1Encoding [
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/space
	/exclam
	/quotedbl
	/numbersign
	/dollar
	/percent
	/ampersand
	/quoteright
	/parenleft
	/parenright
	/asterisk
	/plus
	/comma
	/minus
	/period
	/slash
	/zero
	/one
	/two
	/three
	/four
	/five
	/six
	/seven
	/eight
	/nine
	/colon
	/semicolon
	/less
	/equal
	/greater
	/question
	/at
	/A
	/B
	/C
	/D
	/E
	/F
	/G
	/H
	/I
	/J
	/K
	/L
	/M
	/N
	/O
	/P
	/Q
	/R
	/S
	/T
	/U
	/V
	/W
	/X
	/Y
	/Z
	/bracketleft
	/backslash
	/bracketright
	/asciicircum
	/underscore
	/quoteleft
	/a
	/b
	/c
	/d
	/e
	/f
	/g
	/h
	/i
	/j
	/k
	/l
	/m
	/n
	/o
	/p
	/q
	/r
	/s
	/t
	/u
	/v
	/w
	/x
	/y
	/z
	/braceleft
	/bar
	/braceright
	/asciitilde
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/dotlessi
	/grave
	/acute
	/circumflex
	/tilde
	/macron
	/breve
	/dotaccent
	/dieresis
	/.notdef
	/ring
	/cedilla
	/.notdef
	/hungarumlaut
	/ogonek
	/caron
	/space
	/exclamdown
	/cent
	/sterling
	/currency
	/yen
	/brokenbar		% missing
	/section
	/dieresis
	/copyright
	/ordfeminine
	/guillemotleft
	/logicalnot
	/hyphen
	/registered
	/macron
	/degree			% missing
	/plusminus		% missing
	/twosuperior		% missing
	/threesuperior		% missing
	/acute
	/mu			% missing
	/paragraph
	/periodcentered
	/cedilla
	/onesuperior		% missing
	/ordmasculine
	/guillemotright
	/onequarter		% missing
	/onehalf		% missing
	/threequarters		% missing
	/questiondown
	/Agrave
	/Aacute
	/Acircumflex
	/Atilde
	/Adieresis
	/Aring
	/AE
	/Ccedilla
	/Egrave
	/Eacute
	/Ecircumflex
	/Edieresis
	/Igrave
	/Iacute
	/Icircumflex
	/Idieresis
	/Eth			% missing
	/Ntilde
	/Ograve
	/Oacute
	/Ocircumflex
	/Otilde
	/Odieresis
	/multiply		% missing
	/Oslash
	/Ugrave
	/Uacute
	/Ucircumflex
	/Udieresis
	/Yacute			% missing
	/Thorn			% missing
	/germandbls
	/agrave
	/aacute
	/acircumflex
	/atilde
	/adieresis
	/aring
	/ae
	/ccedilla
	/egrave
	/eacute
	/ecircumflex
	/edieresis
	/igrave
	/iacute
	/icircumflex
	/idieresis
	/eth			% missing
	/ntilde
	/ograve
	/oacute
	/ocircumflex
	/otilde
	/odieresis
	/divide			% missing
	/oslash
	/ugrave
	/uacute
	/ucircumflex
	/udieresis
	/yacute			% missing
	/thorn			% missing
	/ydieresis
] def

/NewFontDirectory FontDirectory maxlength dict def

%
% Apparently no guarantee findfont is defined in systemdict so the obvious
%
%	systemdict /findfont get exec
%
% can generate an error. So far the only exception is a VT600 (version 48.0).
%

userdict /@RealFindfont known not {
	userdict begin
		/@RealFindfont systemdict begin /findfont load end def
	end
} if

/findfont {
	dup NewFontDirectory exch known not {
		dup
		%dup systemdict /findfont get exec	% not always in systemdict
		dup userdict /@RealFindfont get exec
		dup /Encoding get StandardEncoding eq {
			dup length dict begin
				{1 index /FID ne {def}{pop pop} ifelse} forall
				/Encoding ISOLatin1Encoding def
				currentdict
			end
			/DummyFontName exch definefont
		} if
		NewFontDirectory 3 1 roll put
	} if
	NewFontDirectory exch get
} bind def

setup
%%EndSetup
%%Page: 1 1
/saveobj save def
mark
1 pagesetup
12 /Times-Bold f
(PPM) 2196 1230 w
(Format) 2485 1230 w
(Specification) 2901 1230 w
10 /Times-Bold f
(ppm) 720 1920 w
10 /Times-Roman f
(Updated: 03 October 2003) 720 2076 w
(Table Of Contents) 720 2196 w
10 /Times-Bold f
(NAME) 720 2436 w
10 /Times-Roman f
(PPM \255 Netpbm color image format) 720 2592 w
10 /Times-Bold f
(DESCRIPTION) 720 2832 w
10 /Times-Roman f
(This program is part of Netpbm.) 720 3024 w
(The PPM format is a lowest common denominator color image file format.) 720 3180 w
(It) 720 3336 w
(should) 811 3336 w
(be) 1108 3336 w
(noted) 1232 3336 w
(that) 1484 3336 w
(this) 1664 3336 w
(format) 1839 3336 w
(is) 2135 3336 w
(egregiously) 2233 3336 w
(inefficient.) 2730 3336 w
(It) 3221 3336 w
(is) 3313 3336 w
(highly) 3411 3336 w
(redundant,) 3698 3336 w
(while) 4153 3336 w
(containing) 4406 3336 w
(a) 4859 3336 w
(lot) 4934 3336 w
(of) 720 3456 w
(information) 835 3456 w
(that) 1339 3456 w
(the) 1521 3456 w
(human) 1675 3456 w
(eye) 1979 3456 w
(can't) 2149 3456 w
(even) 2380 3456 w
(discern.) 2600 3456 w
(Furthermore,) 2970 3456 w
(the) 3526 3456 w
(format) 3679 3456 w
(allows) 3976 3456 w
(very) 4268 3456 w
(little) 4476 3456 w
(informa\255) 4691 3456 w
(tion) 720 3576 w
(about) 910 3576 w
(the) 1166 3576 w
(image) 1322 3576 w
(besides) 1600 3576 w
(basic) 1928 3576 w
(color,) 2167 3576 w
(which) 2431 3576 w
(means) 2709 3576 w
(you) 2998 3576 w
(may) 3182 3576 w
(have) 3388 3576 w
(to) 3610 3576 w
(couple) 3722 3576 w
(a) 4022 3576 w
(file) 4100 3576 w
(in) 4268 3576 w
(this) 4381 3576 w
(format) 4561 3576 w
(with) 4862 3576 w
(other) 720 3696 w
(independent) 952 3696 w
(information) 1467 3696 w
(to) 1966 3696 w
(get) 2071 3696 w
(any) 2220 3696 w
(decent) 2391 3696 w
(use) 2678 3696 w
(out) 2838 3696 w
(of) 2993 3696 w
(it.) 3102 3696 w
(However,) 3234 3696 w
(it) 3650 3696 w
(is) 3732 3696 w
(very) 3825 3696 w
(easy) 4028 3696 w
(to) 4231 3696 w
(write) 4335 3696 w
(and) 4566 3696 w
(analyze) 4736 3696 w
(programs to process this format, and that is the point.) 720 3816 w
(It) 720 3972 w
(should) 810 3972 w
(also) 1106 3972 w
(be) 1296 3972 w
(noted) 1419 3972 w
(that) 1670 3972 w
(files) 1849 3972 w
(often) 2050 3972 w
(conform) 2284 3972 w
(to) 2651 3972 w
(this) 2758 3972 w
(format) 2932 3972 w
(in) 3227 3972 w
(every) 3334 3972 w
(respect) 3584 3972 w
(except) 3895 3972 w
(the) 4184 3972 w
(precise) 4335 3972 w
(semantics) 4646 3972 w
(of) 720 4092 w
(the) 839 4092 w
(sample) 997 4092 w
(values.) 1316 4092 w
(These) 1657 4092 w
(files) 1931 4092 w
(are) 2139 4092 w
(useful) 2296 4092 w
(because) 2575 4092 w
(of) 2925 4092 w
(the) 3043 4092 w
(way) 3200 4092 w
(PPM) 3401 4092 w
(is) 3637 4092 w
(used) 3739 4092 w
(as) 3957 4092 w
(an) 4075 4092 w
(intermediary) 4204 4092 w
(format.) 4749 4092 w
(They) 720 4212 w
(are) 957 4212 w
(informally) 1110 4212 w
(called) 1564 4212 w
(PPM) 1834 4212 w
(files,) 2067 4212 w
(but) 2296 4212 w
(to) 2456 4212 w
(be) 2566 4212 w
(absolutely) 2692 4212 w
(precise,) 3135 4212 w
(you) 3474 4212 w
(should) 3656 4212 w
(indicate) 3955 4212 w
(the) 4303 4212 w
(variation) 4458 4212 w
(from) 4846 4212 w
(true PPM.) 720 4332 w
(For example, "PPM using the red, green, and blue colors that the scanner in question uses.") 1176 4332 w
(The) 720 4488 w
(name) 904 4488 w
("PPM") 1149 4488 w
(is) 1461 4488 w
(an) 1557 4488 w
(acronym) 1680 4488 w
(derived) 2058 4488 w
(from) 2386 4488 w
("Portable) 2609 4488 w
(Pixel) 3012 4488 w
(Map.") 3247 4488 w
(Images) 3550 4488 w
(in) 3867 4488 w
(this) 3974 4488 w
(format) 4148 4488 w
(\(or) 4444 4488 w
(a) 4590 4488 w
(precursor) 4664 4488 w
(of it\) were once also called "portable pixmaps.") 720 4608 w
(The) 720 4764 w
(format) 907 4764 w
(definition) 1205 4764 w
(is) 1626 4764 w
(as) 1725 4764 w
(follows.) 1840 4764 w
(You) 2222 4764 w
(can) 2426 4764 w
(use) 2596 4764 w
(the) 2762 4764 w
(libnetpbm) 2917 4764 w
(C) 3356 4764 w
(subroutine) 3456 4764 w
(library) 3911 4764 w
(to) 4210 4764 w
(read) 4321 4764 w
(and) 4525 4764 w
(interpret) 4702 4764 w
(the format conveniently and accurately.) 720 4884 w
(A) 720 5040 w
(PPM) 823 5040 w
(file) 1056 5040 w
(consists) 1221 5040 w
(of) 1570 5040 w
(a) 1685 5040 w
(sequence) 1761 5040 w
(of) 2158 5040 w
(one) 2273 5040 w
(or) 2449 5040 w
(more) 2564 5040 w
(PPM) 2801 5040 w
(images.) 3034 5040 w
(There) 3374 5040 w
(are) 3638 5040 w
(no) 3791 5040 w
(data,) 3923 5040 w
(delimiters,) 4146 5040 w
(or) 4603 5040 w
(padding) 4718 5040 w
(before, after, or between images.) 720 5160 w
(Each PPM image consists of the following:) 720 5316 w
(1) 720 5472 w
(A) 970 5472 w
("magic) 1071 5472 w
(number") 1385 5472 w
(for) 1761 5472 w
(identifying) 1907 5472 w
(the) 2376 5472 w
(file) 2528 5472 w
(type.) 2691 5472 w
(A) 2943 5472 w
(ppm) 3045 5472 w
(image's) 3253 5472 w
(magic) 3599 5472 w
(number) 3873 5472 w
(is) 4208 5472 w
(the) 4305 5472 w
(two) 4457 5472 w
(characters) 4637 5472 w
("P6".) 970 5592 w
(2) 720 5748 w
(Whitespace \(blanks, TABs, CRs, LFs\).) 970 5748 w
(3) 720 5904 w
(A width, formatted as ASCII characters in decimal.) 970 5904 w
(4) 720 6060 w
(Whitespace.) 970 6060 w
(5) 720 6216 w
(A height, again in ASCII decimal.) 970 6216 w
(6) 720 6372 w
(Whitespace.) 970 6372 w
(7) 720 6528 w
(The) 970 6528 w
(maximum) 1161 6528 w
(color) 1603 6528 w
(value) 1844 6528 w
(\(Maxval\),) 2096 6528 w
(again) 2528 6528 w
(in) 2781 6528 w
(ASCII) 2896 6528 w
(decimal.) 3194 6528 w
(Must) 3597 6528 w
(be) 3840 6528 w
(less) 3971 6528 w
(than) 4158 6528 w
(65536) 4367 6528 w
(and) 4654 6528 w
(more) 4835 6528 w
(than zero.) 970 6648 w
(8) 720 6804 w
(Newline or other single whitespace character.) 970 6804 w
(9) 720 6960 w
(A) 970 6960 w
(raster) 1076 6960 w
(of) 1331 6960 w
(Height) 1448 6960 w
(rows,) 1754 6960 w
(in) 2007 6960 w
(order) 2120 6960 w
(from) 2365 6960 w
(top) 2594 6960 w
(to) 2757 6960 w
(bottom.) 2870 6960 w
(Each) 3239 6960 w
(row) 3473 6960 w
(consists) 3663 6960 w
(of) 4015 6960 w
(Width) 4133 6960 w
(pixels,) 4418 6960 w
(in) 4717 6960 w
(order) 4830 6960 w
(from) 970 7080 w
(left) 1194 7080 w
(to) 1357 7080 w
(right.) 1465 7080 w
(Each) 1734 7080 w
(pixel) 1963 7080 w
(is) 2193 7080 w
(a) 2290 7080 w
(triplet) 2364 7080 w
(of) 2633 7080 w
(red,) 2746 7080 w
(green,) 2928 7080 w
(and) 3204 7080 w
(blue) 3377 7080 w
(samples,) 3578 7080 w
(in) 3954 7080 w
(that) 4061 7080 w
(order.) 4240 7080 w
(Each) 4529 7080 w
(sample) 4757 7080 w
(is) 970 7200 w
(represented) 1076 7200 w
(in) 1574 7200 w
(pure) 1691 7200 w
(binary) 1907 7200 w
(by) 2202 7200 w
(either) 2342 7200 w
(1) 2609 7200 w
(or) 2699 7200 w
(2) 2822 7200 w
(bytes.) 2912 7200 w
(If) 3213 7200 w
(the) 3319 7200 w
(Maxval) 3481 7200 w
(is) 3826 7200 w
(less) 3933 7200 w
(than) 4123 7200 w
(256,) 4335 7200 w
(it) 4550 7200 w
(is) 4646 7200 w
(1) 4753 7200 w
(byte.) 4843 7200 w
cleartomark
showpage
saveobj restore
%%EndPage: 1 1
%%Page: 2 2
/saveobj save def
mark
2 pagesetup
10 /Times-Roman f
(\255 2 \255) 2797 480 w
(Otherwise, it is 2 bytes.) 970 840 w
(The most significant byte is first.) 1964 840 w
(A row of an image is horizontal.) 720 996 w
(A column is vertical.) 2065 996 w
(The pixels in the image are square and contiguous.) 2953 996 w
(10) 720 1152 w
(In) 970 1152 w
(the) 1085 1152 w
(raster,) 1239 1152 w
(the) 1517 1152 w
(sample) 1671 1152 w
(values) 1986 1152 w
(are) 2273 1152 w
("nonlinear.") 2426 1152 w
(They) 2942 1152 w
(are) 3179 1152 w
(proportional) 3332 1152 w
(to) 3859 1152 w
(the) 3970 1152 w
(intensity) 4125 1152 w
(of) 4503 1152 w
(the) 4619 1152 w
(ITU\255R) 4774 1152 w
(Recommendation) 970 1272 w
(BT.709) 1709 1272 w
(red,) 2046 1272 w
(green,) 2232 1272 w
(and) 2512 1272 w
(blue) 2690 1272 w
(in) 2895 1272 w
(the) 3006 1272 w
(pixel,) 3161 1272 w
(adjusted) 3419 1272 w
(by) 3785 1272 w
(the) 3918 1272 w
(BT.709) 4073 1272 w
(gamma) 4409 1272 w
(transfer) 4736 1272 w
(function.) 970 1392 w
(\(That) 1382 1392 w
(transfer) 1627 1392 w
(function) 1960 1392 w
(specifies) 2322 1392 w
(a) 2700 1392 w
(gamma) 2773 1392 w
(number) 3096 1392 w
(of) 3430 1392 w
(2.2) 3542 1392 w
(and) 3696 1392 w
(has) 3870 1392 w
(a) 4033 1392 w
(linear) 4107 1392 w
(section) 4364 1392 w
(for) 4677 1392 w
(small) 4823 1392 w
(intensities\).) 970 1512 w
(A) 1489 1512 w
(value) 1590 1512 w
(of) 1835 1512 w
(Maxval) 1947 1512 w
(for) 2281 1512 w
(all) 2426 1512 w
(three) 2555 1512 w
(samples) 2783 1512 w
(represents) 3134 1512 w
(CIE) 3567 1512 w
(D65) 3757 1512 w
(white) 3958 1512 w
(and) 4209 1512 w
(the) 4382 1512 w
(most) 4533 1512 w
(intense) 4757 1512 w
(color in the color universe of) 970 1632 w
(which) 2152 1632 w
(the) 2422 1632 w
(image) 2570 1632 w
(is) 2840 1632 w
(part) 2933 1632 w
(\(the) 3114 1632 w
(color) 3295 1632 w
(universe) 3526 1632 w
(is) 3890 1632 w
(all) 3983 1632 w
(the) 4109 1632 w
(colors) 4257 1632 w
(in) 4527 1632 w
(all) 4631 1632 w
(images) 4757 1632 w
(to which this image might be compared\).) 970 1752 w
(ITU\255R) 720 1908 w
(Recommendation) 1022 1908 w
(BT.709) 1763 1908 w
(is) 2102 1908 w
(a) 2205 1908 w
(renaming) 2285 1908 w
(of) 2698 1908 w
(the) 2817 1908 w
(former) 2975 1908 w
(CCIR) 3282 1908 w
(Recommendation) 3552 1908 w
(709.) 4294 1908 w
(When) 4531 1908 w
(CCIR) 4806 1908 w
(was) 720 2028 w
(absorbed) 912 2028 w
(into) 1309 2028 w
(its) 1502 2028 w
(parent) 1634 2028 w
(organization,) 1920 2028 w
(the) 2481 2028 w
(ITU,) 2640 2028 w
(ca.) 2868 2028 w
(2000,) 3018 2028 w
(the) 3280 2028 w
(standard) 3438 2028 w
(was) 3812 2028 w
(renamed.) 4003 2028 w
(This) 4432 2028 w
(document) 4646 2028 w
(once) 720 2148 w
(referred) 940 2148 w
(to) 1286 2148 w
(the) 1396 2148 w
(standard) 1550 2148 w
(as) 1920 2148 w
(CIE) 2035 2148 w
(Rec.) 2228 2148 w
(709,) 2440 2148 w
(but) 2647 2148 w
(it) 2807 2148 w
(isn't) 2895 2148 w
(clear) 3105 2148 w
(now) 3330 2148 w
(that) 3534 2148 w
(CIE) 3717 2148 w
(ever) 3911 2148 w
(sponsored) 4115 2148 w
(such) 4553 2148 w
(a) 4769 2148 w
(stan\255) 4846 2148 w
(dard.) 720 2268 w
(Note) 720 2424 w
(that) 941 2424 w
(another) 1118 2424 w
(popular) 1444 2424 w
(color) 1776 2424 w
(space) 2008 2424 w
(is) 2256 2424 w
(the) 2350 2424 w
(newer) 2499 2424 w
(sRGB.) 2769 2424 w
(A) 3092 2424 w
(common) 3192 2424 w
(variation) 3570 2424 w
(on) 3953 2424 w
(PPM) 4081 2424 w
(is) 4310 2424 w
(to) 4405 2424 w
(subsitute) 4511 2424 w
(this) 4895 2424 w
(color space for the one specified.) 720 2544 w
(11) 720 2700 w
(Note) 970 2700 w
(that) 1200 2700 w
(a) 1386 2700 w
(common) 1466 2700 w
(variation) 1852 2700 w
(on) 2244 2700 w
(the) 2381 2700 w
(PPM) 2540 2700 w
(format) 2778 2700 w
(is) 3081 2700 w
(to) 3185 2700 w
(have) 3300 2700 w
(the) 3525 2700 w
(sample) 3684 2700 w
(values) 4004 2700 w
(be) 4296 2700 w
("linear,") 4427 2700 w
(i.e.) 4798 2700 w
(as) 4957 2700 w
(specified) 970 2820 w
(above) 1369 2820 w
(except) 1646 2820 w
(without) 1945 2820 w
(the) 2289 2820 w
(gamma) 2449 2820 w
(adjustment.) 2781 2820 w
10 /Times-Bold f
(pnmgamma) 3308 2820 w
10 /Times-Roman f
(takes) 3857 2820 w
(such) 4100 2820 w
(a) 4321 2820 w
(PPM) 4403 2820 w
(variant) 4642 2820 w
(as) 4957 2820 w
(input and produces a true PPM as output.) 970 2940 w
(12) 720 3096 w
(Characters from a "#" to the next end\255of\255line, before the maxval line, are comments and are ignored.) 970 3096 w
(Note that you can use) 720 3288 w
10 /Times-Bold f
(pamdepth) 1610 3288 w
10 /Times-Roman f
(to convert between a the format with 1 byte) 2069 3288 w
(per) 3836 3288 w
(sample) 3989 3288 w
(and) 4298 3288 w
(the) 4468 3288 w
(one) 4616 3288 w
(with) 4786 3288 w
(2) 4990 3288 w
(bytes per sample.) 720 3408 w
(There) 720 3564 w
(is) 987 3564 w
(actually) 1089 3564 w
(another) 1440 3564 w
(version) 1774 3564 w
(of) 2103 3564 w
(the) 2221 3564 w
(PPM) 2378 3564 w
(format) 2615 3564 w
(that) 2917 3564 w
(is) 3103 3564 w
(fairly) 3206 3564 w
(rare:) 3458 3564 w
("plain") 3676 3564 w
(PPM) 3994 3564 w
(format.) 4231 3564 w
(The) 4583 3564 w
(format) 4774 3564 w
(above,) 720 3684 w
(which) 1012 3684 w
(generally) 1285 3684 w
(considered) 1684 3684 w
(the) 2144 3684 w
(normal) 2294 3684 w
(one,) 2605 3684 w
(is) 2802 3684 w
(known) 2897 3684 w
(as) 3197 3684 w
(the) 3308 3684 w
("raw") 3458 3684 w
(PPM) 3717 3684 w
(format.) 3946 3684 w
(See) 4290 3684 w
10 /Times-Bold f
(pbm) 4462 3684 w
10 /Times-Roman f
(for) 4685 3684 w
(some) 4829 3684 w
(commentary on how plain and raw formats relate to one another and how to use them.) 720 3804 w
(The difference in the plain format is:) 720 3960 w
(\255) 970 4116 w
(There is exactly one image in a file.) 1220 4116 w
(\255) 970 4272 w
(The magic number is P3 instead of P6.) 1220 4272 w
(\255) 970 4428 w
(Each sample in the raster is represented as an ASCII decimal number \(of arbitrary size\).) 1220 4428 w
(\255) 970 4584 w
(Each) 1220 4584 w
(sample) 1448 4584 w
(in) 1760 4584 w
(the) 1867 4584 w
(raster) 2018 4584 w
(has) 2268 4584 w
(white) 2430 4584 w
(space) 2681 4584 w
(before) 2931 4584 w
(and) 3214 4584 w
(after) 3388 4584 w
(it.) 3600 4584 w
(There) 3736 4584 w
(must) 3998 4584 w
(be) 4223 4584 w
(at) 4347 4584 w
(least) 4449 4584 w
(one) 4662 4584 w
(char\255) 4836 4584 w
(acter) 1220 4704 w
(of) 1443 4704 w
(white) 1556 4704 w
(space) 1808 4704 w
(between) 2059 4704 w
(any) 2421 4704 w
(two) 2594 4704 w
(samples,) 2773 4704 w
(but) 3149 4704 w
(there) 3306 4704 w
(is) 3534 4704 w
(no) 3630 4704 w
(maximum.) 3759 4704 w
(There) 4244 4704 w
(is) 4505 4704 w
(no) 4601 4704 w
(particu\255) 4730 4704 w
(lar) 1220 4824 w
(separation) 1351 4824 w
(of) 1787 4824 w
(one) 1896 4824 w
(pixel) 2066 4824 w
(from) 2293 4824 w
(another) 2514 4824 w
(\255\255) 2840 4824 w
(just) 2933 4824 w
(the) 3105 4824 w
(required) 3254 4824 w
(separation) 3613 4824 w
(between) 4050 4824 w
(the) 4409 4824 w
(blue) 4558 4824 w
(sample) 4757 4824 w
(of one pixel from the red sample of the next pixel.) 1220 4944 w
(\255) 970 5100 w
(No line should be longer than 70 characters.) 1220 5100 w
(Here is an example of a small pixmap in this format.) 720 5256 w
(P3) 720 5436 w
(# feep.ppm) 720 5556 w
(4 4) 720 5676 w
(15) 720 5796 w
(0) 745 5916 w
(0) 845 5916 w
(0) 945 5916 w
(0) 1095 5916 w
(0) 1195 5916 w
(0) 1295 5916 w
(0) 1445 5916 w
(0) 1545 5916 w
(0) 1645 5916 w
(15) 1770 5916 w
(0 15) 1920 5916 w
(0) 745 6036 w
(0) 845 6036 w
(0) 945 6036 w
(0 15) 1095 6036 w
(7) 1320 6036 w
(0) 1470 6036 w
(0) 1570 6036 w
(0) 1670 6036 w
(0) 1820 6036 w
(0) 1920 6036 w
(0) 2020 6036 w
(0) 745 6156 w
(0) 845 6156 w
(0) 945 6156 w
(0) 1095 6156 w
(0) 1195 6156 w
(0) 1295 6156 w
(0 15) 1445 6156 w
(7) 1670 6156 w
(0) 1820 6156 w
(0) 1920 6156 w
(0) 2020 6156 w
(15) 720 6276 w
(0 15) 870 6276 w
(0) 1145 6276 w
(0) 1245 6276 w
(0) 1345 6276 w
(0) 1495 6276 w
(0) 1595 6276 w
(0) 1695 6276 w
(0) 1845 6276 w
(0) 1945 6276 w
(0) 2045 6276 w
(There is a newline character at the end of each of these lines.) 720 6492 w
(Programs) 720 6648 w
(that) 1131 6648 w
(read) 1309 6648 w
(this) 1508 6648 w
(format) 1681 6648 w
(should) 1975 6648 w
(be) 2270 6648 w
(as) 2392 6648 w
(lenient) 2503 6648 w
(as) 2803 6648 w
(possible,) 2914 6648 w
(accepting) 3295 6648 w
(anything) 3705 6648 w
(that) 4083 6648 w
(looks) 4261 6648 w
(remotely) 4506 6648 w
(like) 4890 6648 w
(a pixmap.) 720 6768 w
cleartomark
showpage
saveobj restore
%%EndPage: 2 2
%%Page: 3 3
/saveobj save def
mark
3 pagesetup
10 /Times-Roman f
(\255 3 \255) 2797 480 w
10 /Times-Bold f
(COMPATIBILITY) 720 840 w
10 /Times-Roman f
(Before) 720 1032 w
(April) 1023 1032 w
(2000,) 1266 1032 w
(a) 1523 1032 w
(raw) 1599 1032 w
(format) 1780 1032 w
(PPM) 2078 1032 w
(file) 2311 1032 w
(could) 2476 1032 w
(not) 2730 1032 w
(have) 2890 1032 w
(a) 3110 1032 w
(maxval) 3186 1032 w
(greater) 3512 1032 w
(than) 3820 1032 w
(255.) 4024 1032 w
(Hence,) 4256 1032 w
(it) 4568 1032 w
(could) 4657 1032 w
(not) 4912 1032 w
(have more than one byte per sample.) 720 1152 w
(Old programs may depend on this.) 2236 1152 w
(Before) 720 1308 w
(July) 1020 1308 w
(2000,) 1216 1308 w
(there) 1470 1308 w
(could) 1698 1308 w
(be) 1949 1308 w
(at) 2072 1308 w
(most) 2173 1308 w
(one) 2397 1308 w
(image) 2570 1308 w
(in) 2843 1308 w
(a) 2950 1308 w
(PPM) 3023 1308 w
(file.) 3253 1308 w
(As) 3465 1308 w
(a) 3605 1308 w
(result,) 3678 1308 w
(most) 3954 1308 w
(tools) 4178 1308 w
(to) 4402 1308 w
(process) 4510 1308 w
(PPM) 4839 1308 w
(files ignore \(and don't read\) any data after the first image.) 720 1428 w
10 /Times-Bold f
(SEE ALSO) 720 1668 w
10 /Times-Roman f
(pnm, pgm, pbm, pam, programs that process PPM) 720 1824 w
10 /S1 f
(________________________________________________________________________) 720 1944 w
10 /Times-Bold f
(Table Of Contents) 720 2184 w
10 /LucidaSansUnicode22 f
(\031) 720 2376 w
10 /Times-Roman f
(DESCRIPTION) 970 2376 w
10 /LucidaSansUnicode22 f
(\031) 720 2532 w
10 /Times-Roman f
(COMPATIBILITY) 970 2532 w
10 /LucidaSansUnicode22 f
(\031) 720 2688 w
10 /Times-Roman f
(SEE ALSO) 970 2688 w
cleartomark
showpage
saveobj restore
%%EndPage: 3 3
%%Trailer
done
%%DocumentFonts: Times-Roman LucidaSansUnicode22 Times-Bold S1
%%Pages: 3