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% Version 3.3.2 prologue for troff files.
%

/#copies 1 store
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/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
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/PA /Palatino-Roman def
/PI /Palatino-Italic def
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/KI /Bookman-LightItalic def
/KB /Bookman-Demi def
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/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
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	addmetrics
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/pagedimensions {
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/addmetrics {
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/w {neg moveto show} bind def
/m {neg dup /y exch def moveto} bind def
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/f {
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/changefont {
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/sf {f} bind def

/cf {
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%
% 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 {
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%%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 [
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	/space
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	/parenleft
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	/plus
	/comma
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	/zero
	/one
	/two
	/three
	/four
	/five
	/six
	/seven
	/eight
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	/colon
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	/less
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	/greater
	/question
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	/A
	/B
	/C
	/D
	/E
	/F
	/G
	/H
	/I
	/J
	/K
	/L
	/M
	/N
	/O
	/P
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	/R
	/S
	/T
	/U
	/V
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	/X
	/Y
	/Z
	/bracketleft
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	/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
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	/asciitilde
	/.notdef
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	/grave
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	/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
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/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
(Pnmnorm) 2270 1230 w
(User) 2820 1230 w
(Manual) 3089 1230 w
10 /Times-Bold f
(pnmnorm) 720 1920 w
10 /Times-Roman f
(Updated: 6 January 2006) 720 2076 w
(Table Of Contents) 720 2196 w
10 /Times-Bold f
(NAME) 720 2436 w
10 /Times-Roman f
(pnmnorm \255 normalize the contrast in a Netbpm image) 720 2592 w
10 /Times-Bold f
(SYNOPSIS) 720 2832 w
(pnmnorm) 720 2988 w
10 /Times-Roman f
([) 1210 2988 w
10 /Times-Bold f
(\255bpercent=) 1243 2988 w
10 /Times-Italic f
(N) 1710 2988 w
10 /S f
(\357) 1839 2988 w
10 /Times-Bold f
(\255bvalue=) 1950 2988 w
10 /Times-Italic f
(N) 2324 2988 w
10 /Times-Roman f
(]) 2391 2988 w
([) 2486 2988 w
10 /Times-Bold f
(\255wpercent=) 2519 2988 w
10 /Times-Italic f
(N) 3002 2988 w
10 /S f
(\357) 3131 2988 w
10 /Times-Bold f
(\255wvalue=) 3242 2988 w
10 /Times-Italic f
(N) 3632 2988 w
10 /Times-Roman f
(]) 3699 2988 w
([) 3794 2988 w
10 /Times-Bold f
(\255maxexpand) 3827 2988 w
10 /Times-Roman f
([) 4417 2988 w
10 /Times-Bold f
(\255keephues) 4450 2988 w
10 /Times-Roman f
(]) 4878 2988 w
([) 4974 2988 w
10 /Times-Bold f
(\255) 5007 2988 w
(luminosity) 720 3108 w
10 /Times-Roman f
10 /S f
(\357) 1196 3108 w
10 /Times-Bold f
(\255colorvalue) 1270 3108 w
10 /Times-Roman f
10 /S f
(\357) 1772 3108 w
10 /Times-Bold f
(\255saturation) 1846 3108 w
10 /Times-Roman f
(] [) 2318 3108 w
10 /Times-Italic f
(ppmfile) 2409 3108 w
10 /Times-Roman f
(]) 2709 3108 w
(All) 720 3264 w
(options) 876 3264 w
(can) 1199 3264 w
(be) 1366 3264 w
(abbreviated) 1489 3264 w
(to) 1983 3264 w
(their) 2090 3264 w
(shortest) 2302 3264 w
(unique) 2642 3264 w
(prefix.) 2943 3264 w
(You) 3260 3264 w
(may) 3461 3264 w
(use) 3662 3264 w
(two) 3824 3264 w
(hyphens) 4003 3264 w
(instead) 4365 3264 w
(of) 4677 3264 w
(one) 4789 3264 w
(to) 4962 3264 w
(designate) 720 3384 w
(an) 1134 3384 w
(option.) 1265 3384 w
(You) 1608 3384 w
(may) 1817 3384 w
(use) 2026 3384 w
(either) 2196 3384 w
(white) 2460 3384 w
(space) 2719 3384 w
(or) 2977 3384 w
(an) 3097 3384 w
(equals) 3228 3384 w
(sign) 3520 3384 w
(between) 3723 3384 w
(an) 4091 3384 w
(option) 4221 3384 w
(name) 4513 3384 w
(and) 4765 3384 w
(its) 4945 3384 w
(value.) 720 3504 w
10 /Times-Bold f
(DESCRIPTION) 720 3744 w
10 /Times-Roman f
(This program is part of Netpbm.) 720 3936 w
10 /Times-Bold f
(pnmnorm) 720 4092 w
10 /Times-Roman f
(reads) 1179 4092 w
(a) 1420 4092 w
(PNM) 1495 4092 w
(image) 1743 4092 w
(\(PBM,) 2018 4092 w
(PGM,) 2319 4092 w
(or) 2592 4092 w
(PPM\).) 2706 4092 w
(It) 3021 4092 w
(normalizes) 3113 4092 w
(the) 3582 4092 w
(contrast) 3736 4092 w
(by) 4084 4092 w
(forcing) 4216 4092 w
(the) 4536 4092 w
(brightest) 4690 4092 w
(pixels) 720 4212 w
(to) 995 4212 w
(white,) 1109 4212 w
(the) 1392 4212 w
(darkest) 1550 4212 w
(pixels) 1874 4212 w
(to) 2149 4212 w
(black,) 2263 4212 w
(and) 2540 4212 w
(linearly) 2720 4212 w
(rescaling) 3061 4212 w
(the) 3457 4212 w
(ones) 3615 4212 w
(in) 3834 4212 w
(between;) 3948 4212 w
(and) 4344 4212 w
(produces) 4523 4212 w
(the) 4918 4212 w
(same kind of file as output.) 720 4332 w
(This is pretty useless for a PBM image.) 1858 4332 w
(The) 720 4488 w
(program) 904 4488 w
(first) 1271 4488 w
(determines) 1461 4488 w
(a) 1929 4488 w
(mapping) 2003 4488 w
(of) 2383 4488 w
(old) 2496 4488 w
(brightness) 2654 4488 w
(to) 3095 4488 w
(new) 3203 4488 w
(brightness.) 3399 4488 w
(For) 3890 4488 w
(each) 4059 4488 w
(possible) 4271 4488 w
(brightness) 4629 4488 w
(of a pixel, the program determines a corresponding brightness for the output image.) 720 4608 w
(Then for each pixel in the image, the program computes a) 720 4764 w
(color) 3055 4764 w
(which) 3286 4764 w
(has) 3556 4764 w
(the) 3715 4764 w
(desired) 3863 4764 w
(output) 4177 4764 w
(brightness) 4459 4764 w
(and) 4896 4764 w
(puts) 720 4884 w
(that) 914 4884 w
(in) 1091 4884 w
(the) 1196 4884 w
(output.) 1345 4884 w
(With) 1678 4884 w
(a) 1905 4884 w
(color) 1976 4884 w
(image,) 2208 4884 w
(it) 2503 4884 w
(is) 2585 4884 w
(not) 2678 4884 w
(always) 2832 4884 w
(possible) 3135 4884 w
(to) 3489 4884 w
(compute) 3593 4884 w
(such) 3963 4884 w
(a) 4172 4884 w
(color) 4242 4884 w
(and) 4473 4884 w
(retain) 4643 4884 w
(any) 4896 4884 w
(semblance) 720 5004 w
(of) 1185 5004 w
(the) 1312 5004 w
(original) 1478 5004 w
(hue,) 1833 5004 w
(so) 2046 5004 w
(the) 2179 5004 w
(brightest) 2345 5004 w
(and) 2739 5004 w
(dimmest) 2927 5004 w
(pixels) 3317 5004 w
(may) 3601 5004 w
(only) 3818 5004 w
(approximate) 4041 5004 w
(the) 4585 5004 w
(desired) 4752 5004 w
(brightness.) 720 5124 w
(For a PPM image, you have a choice of three different ways to define brightness:) 720 5280 w
(1) 720 5436 w
(luminosity) 970 5436 w
(2) 720 5592 w
(color value) 970 5592 w
(3) 720 5748 w
(saturation) 970 5748 w
(In) 720 5904 w
(the) 829 5904 w
(case) 977 5904 w
(of) 1174 5904 w
(saturation,) 1283 5904 w
("brightness") 1729 5904 w
(is) 2249 5904 w
(pretty) 2343 5904 w
(much) 2603 5904 w
(a) 2852 5904 w
(misnomer,) 2923 5904 w
(but) 3375 5904 w
(you) 3530 5904 w
(can) 3707 5904 w
(use) 3872 5904 w
(the) 4032 5904 w
(brightness) 4181 5904 w
(analogy) 4619 5904 w
(to) 4962 5904 w
(see what it does.) 720 6024 w
(In the analogy, bright means saturated and dark means unsaturated.) 1430 6024 w
(Note that all of these are different from separately normalizing the individual color components.) 720 6180 w
(An) 720 6336 w
(alternative) 883 6336 w
(way) 1345 6336 w
(to) 1552 6336 w
(spread) 1671 6336 w
(out) 1972 6336 w
(the) 2141 6336 w
(brightnesses) 2304 6336 w
(in) 2840 6336 w
(an) 2960 6336 w
(image) 3096 6336 w
(is) 3382 6336 w
10 /Times-Bold f
(pnmhisteq) 3491 6336 w
10 /Times-Roman f
(.) 3942 6336 w
10 /Times-Bold f
(pnmhisteq) 4034 6336 w
10 /Times-Roman f
(stretches) 4527 6336 w
(the) 4918 6336 w
(brightest) 720 6456 w
(pixels) 1114 6456 w
(to) 1396 6456 w
(white) 1517 6456 w
(and) 1782 6456 w
(the) 1969 6456 w
(darkest) 2134 6456 w
(pixels) 2465 6456 w
(to) 2747 6456 w
(black,) 2868 6456 w
(but) 3152 6456 w
(rather) 3323 6456 w
(than) 3598 6456 w
(linearly) 3813 6456 w
(adjusting) 4161 6456 w
(the) 4571 6456 w
(ones) 4736 6456 w
(in) 4962 6456 w
(between, it adjusts them so that there are an equal number of pixels of each brightness throughout the range.) 720 6576 w
(This gives you more contrast than) 720 6696 w
10 /Times-Bold f
(pnmnorm) 2102 6696 w
10 /Times-Roman f
(does, but can considerably change the picture in exchange.) 2555 6696 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
10 /Times-Bold f
(OPTIONS) 720 840 w
10 /Times-Roman f
(By) 720 1032 w
(default,) 867 1032 w
(the) 1199 1032 w
(darkest) 1351 1032 w
(2) 1669 1032 w
(percent) 1749 1032 w
(of) 2072 1032 w
(all) 2185 1032 w
(pixels) 2315 1032 w
(are) 2584 1032 w
(mapped) 2735 1032 w
(to) 3081 1032 w
(black,) 3189 1032 w
(and) 3460 1032 w
(the) 3634 1032 w
(brightest) 3786 1032 w
(1) 4167 1032 w
(percent) 4248 1032 w
(are) 4572 1032 w
(mapped) 4724 1032 w
(to) 720 1152 w
(white.) 832 1152 w
(You) 1138 1152 w
(can) 1344 1152 w
(override) 1516 1152 w
(these) 1882 1152 w
(percentages) 2121 1152 w
(by) 2625 1152 w
(using) 2759 1152 w
(the) 3010 1152 w
10 /Times-Bold f
(\255bpercent) 3166 1152 w
10 /Times-Roman f
(and) 3610 1152 w
10 /Times-Bold f
(\255wpercent) 3788 1152 w
10 /Times-Roman f
(options,) 4248 1152 w
(or) 4602 1152 w
(you) 4719 1152 w
(can) 4902 1152 w
(specify) 720 1272 w
(the) 1035 1272 w
(exact) 1184 1272 w
(pixel) 1421 1272 w
(values) 1648 1272 w
(to) 1930 1272 w
(be) 2035 1272 w
(mapped) 2156 1272 w
(by) 2499 1272 w
(using) 2626 1272 w
(the) 2870 1272 w
10 /Times-Bold f
(\255bvalue) 3019 1272 w
10 /Times-Roman f
(and) 3363 1272 w
10 /Times-Bold f
(\255wvalue) 3534 1272 w
10 /Times-Roman f
(options.) 3894 1272 w
(You) 4266 1272 w
(can) 4465 1272 w
(get) 4630 1272 w
(appro\255) 4780 1272 w
(priate) 720 1392 w
(numbers) 977 1392 w
(for) 1351 1392 w
(the) 1496 1392 w
(options) 1647 1392 w
(from) 1971 1392 w
10 /Times-Bold f
(ppmhist) 2194 1392 w
10 /Times-Roman f
(.) 2545 1392 w
(If) 2624 1392 w
(you) 2719 1392 w
(just) 2898 1392 w
(want) 3072 1392 w
(to) 3295 1392 w
(enhance) 3402 1392 w
(the) 3757 1392 w
(contrast,) 3908 1392 w
(then) 4278 1392 w
(choose) 4479 1392 w
(values) 4785 1392 w
(at) 720 1512 w
(elbows) 818 1512 w
(in) 1127 1512 w
(the) 1231 1512 w
(histogram;) 1379 1512 w
(e.g.) 1833 1512 w
(if) 2003 1512 w
(value) 2090 1512 w
(29) 2332 1512 w
(represents) 2458 1512 w
(3%) 2888 1512 w
(of) 3047 1512 w
(the) 3156 1512 w
(image) 3304 1512 w
(but) 3574 1512 w
(value) 3728 1512 w
(30) 3970 1512 w
(represents) 4097 1512 w
(20%,) 4528 1512 w
(choose) 4763 1512 w
(30) 720 1632 w
(for) 846 1632 w
10 /Times-Italic f
(bvalue) 988 1632 w
10 /Times-Roman f
(.) 1254 1632 w
(If) 1330 1632 w
(you) 1422 1632 w
(want) 1598 1632 w
(to) 1818 1632 w
(brighten the image, then set) 1922 1632 w
10 /Times-Italic f
(bvalue) 3054 1632 w
10 /Times-Roman f
(to 0 and just fiddle with) 3345 1632 w
10 /Times-Italic f
(wvalue) 4323 1632 w
10 /Times-Roman f
(; similarly,) 4606 1632 w
(to darken the image, set) 720 1752 w
10 /Times-Italic f
(wvalue) 1696 1752 w
10 /Times-Roman f
(to maxval and play with) 2004 1752 w
10 /Times-Italic f
(bvalue) 2995 1752 w
10 /Times-Roman f
(.) 3261 1752 w
(If) 720 1908 w
(you) 821 1908 w
(specify) 1006 1908 w
(both) 1330 1908 w
10 /Times-Bold f
(\255bvalue) 1544 1908 w
10 /Times-Roman f
(and) 1897 1908 w
10 /Times-Bold f
(\255bpercent) 2077 1908 w
10 /Times-Roman f
(,) 2487 1908 w
10 /Times-Bold f
(pnmnorm) 2548 1908 w
10 /Times-Roman f
(uses) 3012 1908 w
(the) 3220 1908 w
(one) 3378 1908 w
(that) 3558 1908 w
(produces) 3744 1908 w
(the) 4140 1908 w
(least) 4298 1908 w
(change.) 4517 1908 w
(The) 4885 1908 w
(same goes for) 720 2028 w
10 /Times-Bold f
(\255wvalue) 1299 2028 w
10 /Times-Roman f
(and) 1657 2028 w
10 /Times-Bold f
(\255wpercent) 1826 2028 w
10 /Times-Roman f
(.) 2252 2028 w
(If) 720 2184 w
(you) 814 2184 w
(want) 993 2184 w
(to) 1216 2184 w
(maximize) 1323 2184 w
(the) 1746 2184 w
(change) 1897 2184 w
(instead) 2208 2184 w
(of) 2520 2184 w
(minimizing) 2632 2184 w
(it,) 3123 2184 w
(just) 3233 2184 w
(cascade) 3407 2184 w
(two) 3745 2184 w
(runs) 3924 2184 w
(of) 4125 2184 w
10 /Times-Bold f
(pnmnorm) 4237 2184 w
10 /Times-Roman f
(,) 4665 2184 w
(specify\255) 4719 2184 w
(ing values for the first and percentages for the second.) 720 2304 w
(This) 720 2460 w
(is) 933 2460 w
(further) 1036 2460 w
(constrained) 1343 2460 w
(by) 1839 2460 w
(the) 1975 2460 w
10 /Times-Bold f
(\255maxexpand) 2133 2460 w
10 /Times-Roman f
(option.) 2697 2460 w
(Sometimes,) 3039 2460 w
(too) 3545 2460 w
(much) 3709 2460 w
(contrast) 3967 2460 w
(is) 4319 2460 w
(a) 4422 2460 w
(bad) 4502 2460 w
(thing.) 4682 2460 w
(If) 4974 2460 w
(your) 720 2580 w
(intensities) 929 2580 w
(are all concentrated in the middle,) 1361 2580 w
10 /Times-Bold f
(\255bpercent=2) 2744 2580 w
10 /Times-Roman f
(and) 3286 2580 w
10 /Times-Bold f
(\255wpercent=1) 3455 2580 w
10 /Times-Roman f
(might mean that an inten\255) 4013 2580 w
(sity) 720 2700 w
(of) 896 2700 w
(60) 1010 2700 w
(gets) 1141 2700 w
(stretched) 1333 2700 w
(up) 1724 2700 w
(to) 1855 2700 w
(100) 1964 2700 w
(and) 2145 2700 w
(and) 2320 2700 w
(intensity) 2495 2700 w
(of) 2871 2700 w
(40) 2985 2700 w
(gets) 3116 2700 w
(stretched) 3308 2700 w
(down) 3700 2700 w
(to) 3954 2700 w
(zero,) 4064 2700 w
(for) 4292 2700 w
(a) 4440 2700 w
(range) 4516 2700 w
(expan\255) 4769 2700 w
(sion) 720 2820 w
(of) 916 2820 w
(150%) 1028 2820 w
(\(from) 1290 2820 w
(a) 1546 2820 w
(range) 1619 2820 w
(of) 1869 2820 w
(40) 1981 2820 w
(to) 2110 2820 w
(a) 2217 2820 w
(range) 2290 2820 w
(of) 2540 2820 w
(100\).) 2652 2820 w
(That) 2914 2820 w
(much) 3126 2820 w
(stretching) 3377 2820 w
(means) 3800 2820 w
(two) 4084 2820 w
(adjacent) 4263 2820 w
(pixels) 4623 2820 w
(that) 4890 2820 w
(used to differ in intensity by 4 units now differ by 10, and that might be unsightly.) 720 2940 w
(So) 720 3096 w
(that) 855 3096 w
(you) 1034 3096 w
(can) 1213 3096 w
(put) 1380 3096 w
(a) 1537 3096 w
(limit) 1610 3096 w
(on) 1829 3096 w
(the) 1958 3096 w
(amount) 2110 3096 w
(of) 2440 3096 w
(expansion) 2553 3096 w
(without) 2988 3096 w
(having) 3324 3096 w
(to) 3626 3096 w
(examine) 3734 3096 w
(the) 4102 3096 w
(image) 4254 3096 w
(first,) 4528 3096 w
(there) 4744 3096 w
(is) 4973 3096 w
(the) 720 3216 w
10 /Times-Bold f
(\255maxexpand) 875 3216 w
10 /Times-Roman f
(option.) 1436 3216 w
(It) 1775 3216 w
(specifies) 1869 3216 w
(the) 2251 3216 w
(maximum) 2406 3216 w
(expansion) 2845 3216 w
(you) 3283 3216 w
(will) 3465 3216 w
(tolerate,) 3653 3216 w
(as) 4009 3216 w
(an) 4124 3216 w
(additional) 4250 3216 w
(per) 4682 3216 w
(cent\255) 4841 3216 w
(age.) 720 3336 w
(In) 934 3336 w
(the) 1043 3336 w
(example) 1191 3336 w
(above,) 1555 3336 w
(you) 1844 3336 w
(could) 2020 3336 w
(say) 2268 3336 w
10 /Times-Bold f
(\255maxexpand=50) 2427 3336 w
10 /Times-Roman f
(to) 3139 3336 w
(say) 3244 3336 w
(you) 3404 3336 w
(want) 3581 3336 w
(the) 3802 3336 w
(range) 3951 3336 w
(to) 4199 3336 w
(expand) 4304 3336 w
(by) 4619 3336 w
(at) 4746 3336 w
(most) 4845 3336 w
(50%,) 720 3456 w
(regardless) 958 3456 w
(of) 1392 3456 w
(your) 1505 3456 w
(other) 1718 3456 w
(options.) 1953 3456 w
10 /Times-Bold f
(pnmnorm) 2328 3456 w
10 /Times-Roman f
(figures) 2785 3456 w
(out) 3091 3456 w
(what) 3248 3456 w
(intensity) 3471 3456 w
(to) 3845 3456 w
(stretch) 3952 3456 w
(to) 4247 3456 w
(full) 4354 3456 w
(intensity) 4522 3456 w
(and) 4896 3456 w
(what) 720 3576 w
(intensity) 942 3576 w
(to) 1315 3576 w
(stretch) 1421 3576 w
(to) 1715 3576 w
(zero) 1821 3576 w
(intensity) 2020 3576 w
(as) 2393 3576 w
(described) 2504 3576 w
(above,) 2915 3576 w
(and) 3207 3576 w
(then) 3380 3576 w
(raises) 3581 3576 w
(the) 3837 3576 w
(former) 3988 3576 w
(and) 4288 3576 w
(lowers) 4461 3576 w
(the) 4756 3576 w
(lat\255) 4907 3576 w
(ter as needed to limit the expansion to the amount you specified.) 720 3696 w
(When) 720 3852 w
10 /Times-Bold f
(pnmnorm) 983 3852 w
10 /Times-Roman f
(limits the expansion due to) 1436 3852 w
10 /Times-Bold f
(\255maxexpand) 2539 3852 w
10 /Times-Roman f
(, it tells you about it with a message like this:) 3067 3852 w
10 /Courier f
(limiting expansion of 150% to 50%) 960 4032 w
10 /Times-Roman f
(In any case,) 720 4248 w
10 /Times-Bold f
(pnmnorm) 1218 4248 w
10 /Times-Roman f
(tells you exactly what expansion it's doing, like this:) 1671 4248 w
10 /Courier f
(remapping 25..75 to 0..100) 960 4428 w
10 /Times-Roman f
(Before) 720 4644 w
(Netpbm) 1018 4644 w
(10.26) 1367 4644 w
(\(December) 1619 4644 w
(2004\),) 2088 4644 w
(it) 2373 4644 w
(was) 2456 4644 w
(not) 2638 4644 w
(valid) 2793 4644 w
(to) 3020 4644 w
(specify) 3125 4644 w
(both) 3440 4644 w
10 /Times-Bold f
(\255bvalue) 3645 4644 w
10 /Times-Roman f
(and) 3989 4644 w
10 /Times-Bold f
(\255bpercent) 4160 4644 w
10 /Times-Roman f
(or) 4597 4644 w
10 /Times-Bold f
(\255wvalue) 4707 4644 w
10 /Times-Roman f
(and) 720 4764 w
10 /Times-Bold f
(\255wpercent) 889 4764 w
10 /Times-Roman f
(.) 1315 4764 w
10 /Times-Bold f
(\255maxexpand) 720 4920 w
10 /Times-Roman f
(was new in Netpbm 10.32 \(February 2006\).) 1273 4920 w
(The) 720 5076 w
10 /Times-Bold f
(\255keephues) 906 5076 w
10 /Times-Roman f
(option) 1365 5076 w
(says) 1652 5076 w
(to) 1855 5076 w
(keep) 1964 5076 w
(each) 2184 5076 w
(pixel) 2398 5076 w
(the) 2630 5076 w
(same) 2784 5076 w
(hue) 3021 5076 w
(as) 3197 5076 w
(it) 3312 5076 w
(is) 3400 5076 w
(in) 3499 5076 w
(the) 3609 5076 w
(input;) 3763 5076 w
(just) 4029 5076 w
(adjust) 4206 5076 w
(its) 4477 5076 w
(brightness.) 4604 5076 w
(You) 720 5196 w
(normally) 931 5196 w
(want) 1331 5196 w
(this;) 1564 5196 w
(the) 1776 5196 w
(only) 1937 5196 w
(reason) 2153 5196 w
(it) 2451 5196 w
(is) 2545 5196 w
(not) 2650 5196 w
(the) 2816 5196 w
(default) 2976 5196 w
(behavior) 3291 5196 w
(is) 3678 5196 w
(backward) 3783 5196 w
(compatibility) 4208 5196 w
(with) 4780 5196 w
(a) 4996 5196 w
(design mistake.) 720 5316 w
(By) 720 5472 w
(default,) 872 5472 w
10 /Times-Bold f
(pnmnorm) 1209 5472 w
10 /Times-Roman f
(normalizes) 1672 5472 w
(contrast) 2145 5472 w
(in) 2496 5472 w
(each) 2609 5472 w
(component) 2826 5472 w
(independently) 3305 5472 w
(\(except) 3906 5472 w
(that) 4234 5472 w
(the) 4419 5472 w
(meaning) 4577 5472 w
(of) 4957 5472 w
(the) 720 5592 w
10 /Times-Bold f
(\255wpercent) 873 5592 w
10 /Times-Roman f
(and) 1330 5592 w
10 /Times-Bold f
(\255bpercent) 1505 5592 w
10 /Times-Roman f
(options) 1946 5592 w
(are) 2272 5592 w
(based) 2424 5592 w
(on) 2682 5592 w
(the) 2813 5592 w
(overall) 2966 5592 w
(brightnesses) 3274 5592 w
(of) 3799 5592 w
(the) 3913 5592 w
(colors,) 4066 5592 w
(not) 4365 5592 w
(each) 4523 5592 w
(compo\255) 4735 5592 w
(nent) 720 5712 w
(taken) 927 5712 w
(separately\).) 1178 5712 w
(So) 1700 5712 w
(if) 1841 5712 w
(you) 1937 5712 w
(have) 2122 5712 w
(a) 2346 5712 w
(color) 2426 5712 w
(which) 2667 5712 w
(is) 2947 5712 w
(intensely) 3050 5712 w
(red) 3447 5712 w
(but) 3610 5712 w
(dimly) 3774 5712 w
(green,) 4044 5712 w
10 /Times-Bold f
(pnmnorm) 4326 5712 w
10 /Times-Roman f
(would) 4790 5712 w
(make) 720 5832 w
(the) 969 5832 w
(red) 1124 5832 w
(more) 1283 5832 w
(intense) 1520 5832 w
(and) 1835 5832 w
(the) 2011 5832 w
(green) 2165 5832 w
(less) 2418 5832 w
(intense,) 2600 5832 w
(so) 2940 5832 w
(you) 3061 5832 w
(end) 3243 5832 w
(up) 3419 5832 w
(with) 3551 5832 w
(a) 3761 5832 w
(different) 3837 5832 w
(hue) 4212 5832 w
(than) 4388 5832 w
(you) 4592 5832 w
(started) 4774 5832 w
(with.) 720 5952 w
(If) 720 6108 w
(you) 826 6108 w
(specify) 1016 6108 w
10 /Times-Bold f
(\255keephues) 1344 6108 w
10 /Times-Roman f
(,) 1772 6108 w
10 /Times-Bold f
(pnmnorm) 1837 6108 w
10 /Times-Roman f
(would) 2305 6108 w
(likely) 2595 6108 w
(leave) 2863 6108 w
(this) 3113 6108 w
(pixel) 3298 6108 w
(alone,) 3539 6108 w
(since) 3821 6108 w
(its) 4067 6108 w
(overall) 4203 6108 w
(brightness) 4521 6108 w
(is) 4973 6108 w
(medium.) 720 6228 w
10 /Times-Bold f
(\255keephues) 720 6384 w
10 /Times-Roman f
(can) 1174 6384 w
(cause) 1338 6384 w
(clipping,) 1585 6384 w
(because) 1964 6384 w
(a) 2305 6384 w
(certain) 2375 6384 w
(color) 2672 6384 w
(may) 2903 6384 w
(be) 3101 6384 w
(below) 3221 6384 w
(a) 3491 6384 w
(target) 3561 6384 w
(intensity) 3814 6384 w
(while) 4185 6384 w
(one) 4433 6384 w
(of) 4603 6384 w
(its) 4713 6384 w
(com\255) 4835 6384 w
(ponents) 720 6504 w
(is) 1066 6504 w
(saturated.) 1168 6504 w
(Where) 1613 6504 w
(that's) 1913 6504 w
(the) 2170 6504 w
(case,) 2327 6504 w
10 /Times-Bold f
(pnmnorm) 2558 6504 w
10 /Times-Roman f
(uses) 3021 6504 w
(the) 3228 6504 w
(maximum) 3384 6504 w
(representable) 3824 6504 w
(intensity) 4389 6504 w
(for) 4768 6504 w
(the) 4918 6504 w
(saturated) 720 6624 w
(component) 1114 6624 w
(and) 1592 6624 w
(the) 1770 6624 w
(pixel) 1926 6624 w
(ends) 2160 6624 w
(up) 2378 6624 w
(with) 2513 6624 w
(less) 2726 6624 w
(overall) 2911 6624 w
(intensity,) 3223 6624 w
(and) 3628 6624 w
(a) 3807 6624 w
(different) 3886 6624 w
(hue,) 4264 6624 w
(than) 4468 6624 w
(it) 4675 6624 w
(is) 4766 6624 w
(sup\255) 4868 6624 w
(posed to have.) 720 6744 w
(This option is meaningless on grayscale images.) 720 6900 w
(When) 720 7056 w
(you) 985 7056 w
(don't) 1162 7056 w
(specify) 1400 7056 w
10 /Times-Bold f
(\255keephues) 1716 7056 w
10 /Times-Roman f
(,) 2144 7056 w
(the) 2197 7056 w
10 /Times-Bold f
(\255luminosity) 2347 7056 w
10 /Times-Roman f
(,) 2831 7056 w
10 /Times-Bold f
(\255colorvalue) 2884 7056 w
10 /Times-Roman f
(,) 3361 7056 w
(and) 3414 7056 w
10 /Times-Bold f
(\255saturation) 3586 7056 w
10 /Times-Roman f
(options) 4086 7056 w
(affect) 4409 7056 w
(the) 4663 7056 w
(trans\255) 4813 7056 w
(fer) 720 7176 w
(function) 871 7176 w
(\(which) 1245 7176 w
(is) 1563 7176 w
(the) 1671 7176 w
(same) 1834 7176 w
(for) 2080 7176 w
(all) 2237 7176 w
(three) 2378 7176 w
(RGB) 2618 7176 w
(components\),) 2865 7176 w
(but) 3447 7176 w
(are) 3616 7176 w
(meaningless) 3778 7176 w
(when) 4313 7176 w
(it) 4570 7176 w
(comes) 4667 7176 w
(to) 4962 7176 w
(applying the transfer function \(since it is applied to each individual RGB component\).) 720 7296 w
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10 /Times-Roman f
(\255 3 \255) 2797 480 w
(Before Netpbm 9.25 \(March 2002\), there was no) 720 840 w
10 /Times-Bold f
(\255keephues) 2693 840 w
10 /Times-Roman f
(option.) 3146 840 w
10 /Times-Bold f
(\255luminosity) 720 996 w
10 /Times-Roman f
(,) 1204 996 w
10 /Times-Bold f
(\255colorvalue) 1267 996 w
10 /Times-Roman f
(,) 1744 996 w
(and) 1807 996 w
10 /Times-Bold f
(\255saturation) 1990 996 w
10 /Times-Roman f
(determine) 2501 996 w
(what) 2939 996 w
(property) 3172 996 w
(of) 3549 996 w
(the) 3671 996 w
(pixels) 3832 996 w
10 /Times-Bold f
(pnmnorm) 4110 996 w
10 /Times-Roman f
(normalizes.) 4577 996 w
(I.e., what kind of brightness.) 720 1116 w
(You cannot specify more than one of these.) 1913 1116 w
(The) 720 1272 w
10 /Times-Bold f
(\255luminosity) 907 1272 w
10 /Times-Roman f
(option) 1423 1272 w
(says) 1711 1272 w
(to) 1915 1272 w
(use) 2025 1272 w
(the) 2190 1272 w
(luminosity) 2344 1272 w
(\(i.e.) 2805 1272 w
(the) 2992 1272 w
("Y") 3146 1272 w
(in) 3332 1272 w
(the) 3442 1272 w
(YUV) 3596 1272 w
(or) 3844 1272 w
(YCbCr) 3959 1272 w
(color) 4280 1272 w
(space\)) 4517 1272 w
(as) 4803 1272 w
(the) 4918 1272 w
(pixel's) 720 1392 w
(brightness.) 1028 1392 w
(The) 1525 1392 w
(luminosity) 1716 1392 w
(is) 2181 1392 w
(a) 2283 1392 w
(measure) 2362 1392 w
(of) 2729 1392 w
(how) 2847 1392 w
(bright) 3054 1392 w
(a) 3328 1392 w
(human) 3407 1392 w
(eye) 3714 1392 w
(would) 3887 1392 w
(find) 4172 1392 w
(the) 4368 1392 w
(color,) 4525 1392 w
(taking) 4790 1392 w
(into account the fact that the human eye is more sensitive to some RGB components than others.) 720 1512 w
(This option is default.) 720 1668 w
(This option is meaningless on grayscale images.) 720 1824 w
(Before Netpbm 10.28 \(August 2005\), there was no) 720 1980 w
10 /Times-Bold f
(\255luminosity) 2772 1980 w
10 /Times-Roman f
(option, but its meaning was still the default.) 3281 1980 w
(Before Netpbm 10.28 \(August 2005\), there was no) 720 2136 w
10 /Times-Bold f
(\255colorvalue) 2772 2136 w
10 /Times-Roman f
(option.) 3274 2136 w
(The) 720 2292 w
10 /Times-Bold f
(\255colorvalue) 913 2292 w
10 /Times-Roman f
(option) 1428 2292 w
(says) 1723 2292 w
(to) 1934 2292 w
(use) 2051 2292 w
(the) 2223 2292 w
(color) 2384 2292 w
(value) 2628 2292 w
(\(i.e.) 2883 2292 w
(the) 3077 2292 w
("V") 3238 2292 w
(in) 3431 2292 w
(the) 3548 2292 w
(HSV) 3709 2292 w
(color) 3948 2292 w
(space\)) 4192 2292 w
(as) 4485 2292 w
(the) 4607 2292 w
(pixel's) 4768 2292 w
(brightness.) 720 2412 w
(The color value is the gamma\255adjusted intensity of the most intense RGB component.) 1206 2412 w
(This option is meaningless on grayscale images.) 720 2568 w
(Before Netpbm 10.28 \(August 2005\), there was no) 720 2724 w
10 /Times-Bold f
(\255colorvalue) 2772 2724 w
10 /Times-Roman f
(option.) 3274 2724 w
(The) 720 2880 w
10 /Times-Bold f
(\255saturation) 902 2880 w
10 /Times-Roman f
(option) 1401 2880 w
(says) 1684 2880 w
(to) 1883 2880 w
(use) 1988 2880 w
(the) 2148 2880 w
(saturation) 2297 2880 w
(\(i.e.) 2718 2880 w
(the) 2900 2880 w
("S") 3049 2880 w
(in) 3214 2880 w
(the) 3319 2880 w
(HSV) 3468 2880 w
(color) 3695 2880 w
(space\)) 3927 2880 w
(as) 4208 2880 w
(the) 4318 2880 w
(pixel's) 4468 2880 w
(bright\255) 4768 2880 w
(ness.) 720 3000 w
(The) 983 3000 w
(saturation) 1179 3000 w
(is) 1614 3000 w
(the) 1722 3000 w
(ratio) 1885 3000 w
(of) 2109 3000 w
(the) 2233 3000 w
(intensity) 2396 3000 w
(of) 2782 3000 w
(the) 2906 3000 w
(most) 3069 3000 w
(intense) 3304 3000 w
(RGB) 3627 3000 w
(component) 3873 3000 w
(to) 4357 3000 w
(the) 4475 3000 w
(difference) 4637 3000 w
(between the intensities of the most and least intense RGB component \(all intensities gamma\255adjusted\).) 720 3120 w
(In) 720 3276 w
(this) 831 3276 w
(case,) 1004 3276 w
("brightness") 1228 3276 w
(is) 1750 3276 w
(more) 1846 3276 w
(of) 2080 3276 w
(a) 2192 3276 w
(metaphor) 2265 3276 w
(than) 2671 3276 w
(anything.) 2872 3276 w
("bright") 3301 3276 w
(means) 3651 3276 w
(saturated) 3935 3276 w
(and) 4324 3276 w
("dark") 4497 3276 w
(means) 4785 3276 w
(unsaturated.) 720 3396 w
(This option is meaningless on grayscale images.) 720 3552 w
(Before Netpbm 10.28 \(August 2005\), there was no) 720 3708 w
10 /Times-Bold f
(\255colorvalue) 2772 3708 w
10 /Times-Roman f
(option.) 3274 3708 w
10 /Times-Bold f
(SEE ALSO) 720 3948 w
(pnmhisteq) 720 4104 w
10 /Times-Roman f
(,) 1171 4104 w
10 /Times-Bold f
(ppmhist) 1221 4104 w
10 /Times-Roman f
(,) 1572 4104 w
10 /Times-Bold f
(pgmhist) 1622 4104 w
10 /Times-Roman f
(,) 1967 4104 w
10 /Times-Bold f
(pnmgamma) 2017 4104 w
10 /Times-Roman f
(,) 2528 4104 w
10 /Times-Bold f
(ppmbrighten) 2578 4104 w
10 /Times-Roman f
(,) 3140 4104 w
10 /Times-Bold f
(ppmdim) 3190 4104 w
10 /Times-Roman f
(,) 3552 4104 w
10 /Times-Bold f
(pnm) 3602 4104 w
10 /S1 f
(________________________________________________________________________) 720 4224 w
10 /Times-Bold f
(Table Of Contents) 720 4464 w
10 /LucidaSansUnicode22 f
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10 /Times-Roman f
(SYNOPSIS) 970 4656 w
10 /LucidaSansUnicode22 f
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10 /Times-Roman f
(DESCRIPTION) 970 4812 w
10 /LucidaSansUnicode22 f
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10 /Times-Roman f
(OPTIONS) 970 4968 w
10 /LucidaSansUnicode22 f
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10 /Times-Roman f
(SEE ALSO) 970 5124 w
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