%!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 (Pamthreshold User) 2169 1230 w (Manual) 3189 1230 w 10 /Times-Bold f (pamthreshold) 720 1920 w 10 /Times-Roman f (Updated: 12 May 2006) 720 2076 w (Table Of Contents) 720 2196 w 10 /Times-Bold f (NAME) 720 2436 w 10 /Times-Roman f (pamthreshold \255 threshold grayscale image to black and white) 720 2592 w 10 /Times-Bold f (SYNOPSIS) 720 2832 w (pamthreshold) 720 2988 w 10 /Times-Roman f ([) 1433 2988 w 10 /Times-Bold f (\255simple) 1466 2988 w 10 /Times-Roman f (]) 1777 2988 w ([) 1929 2988 w 10 /Times-Bold f (\255local=) 1962 2988 w 10 /Times-Italic f (width) 2252 2988 w 10 /Times-Bold f (x) 2475 2988 w 10 /Times-Italic f (height) 2525 2988 w 10 /Times-Roman f (]) 2775 2988 w ([) 2927 2988 w 10 /Times-Bold f (\255dual=) 2960 2988 w 10 /Times-Italic f (width) 3240 2988 w 10 /Times-Bold f (x) 3463 2988 w 10 /Times-Italic f (height) 3513 2988 w 10 /Times-Roman f (]) 3763 2988 w ([) 3915 2988 w 10 /Times-Bold f (\255threshold=) 3948 2988 w 10 /Times-Italic f (threshold) 4444 2988 w 10 /Times-Roman f (]) 4822 2988 w ([) 4974 2988 w 10 /Times-Bold f (\255) 5007 2988 w (contrast=) 720 3108 w 10 /Times-Italic f (threshold) 1126 3108 w 10 /Times-Roman f (] [) 1504 3108 w 10 /Times-Italic f (inputpamfile) 1595 3108 w 10 /Times-Roman f (]) 2101 3108 w (Minimum) 720 3264 w (unique) 1156 3264 w (abbreviation) 1463 3264 w (of) 1997 3264 w (options) 2115 3264 w (is) 2445 3264 w (acceptable.) 2547 3264 w (You) 3027 3264 w (may) 3234 3264 w (use) 3441 3264 w (double) 3609 3264 w (hyphens) 3916 3264 w (instead) 4284 3264 w (of) 4602 3264 w (a) 4721 3264 w (single) 4801 3264 w (hyphen) 720 3384 w (to) 1044 3384 w (denote) 1152 3384 w (options.) 1448 3384 w (You) 1798 3384 w (may) 2000 3384 w (use) 2202 3384 w (white) 2364 3384 w (space) 2615 3384 w (in) 2865 3384 w (place) 2972 3384 w (of) 3211 3384 w (the) 3323 3384 w (equals) 3474 3384 w (sign) 3758 3384 w (to) 3954 3384 w (separate) 4061 3384 w (an) 4416 3384 w (option) 4539 3384 w (name) 4824 3384 w (from its 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 (pamthreshold) 720 4092 w 10 /Times-Roman f (thresholds) 1345 4092 w (a) 1786 4092 w (grayscale) 1860 4092 w (image.) 2266 4092 w (Thresholding) 2565 4092 w (means) 3128 4092 w (dividing) 3414 4092 w (the) 3779 4092 w (image) 3932 4092 w (into) 4207 4092 w (background) 4394 4092 w (and) 4896 4092 w (foreground by comparing every pixel to a thresholding value.) 720 4212 w (The) 720 4368 w (input) 904 4368 w (should) 1139 4368 w (be) 1435 4368 w (a) 1558 4368 w (PGM) 1631 4368 w (image) 1877 4368 w (or) 2150 4368 w (a) 2262 4368 w (PAM) 2335 4368 w (image) 2581 4368 w (of) 2854 4368 w (tuple) 2966 4368 w (type) 3195 4368 w (GRAYSCALE.) 3396 4368 w (However,) 4076 4368 w (pamthreshold) 4496 4368 w (doesn't) 720 4488 w (check;) 1049 4488 w (it) 1344 4488 w (just) 1435 4488 w (thresholds) 1615 4488 w (the) 2061 4488 w (first) 2218 4488 w (channel) 2414 4488 w (as) 2759 4488 w (if) 2876 4488 w (it) 2971 4488 w (were) 3061 4488 w (grayscale) 3288 4488 w (samples.) 3698 4488 w (So) 4104 4488 w (if) 4244 4488 w (you) 4339 4488 w (feed) 4523 4488 w (it) 4728 4488 w (e.g.) 4818 4488 w (a) 4996 4488 w (PPM image, it will work but produce probably useless results.) 720 4608 w (The) 720 4764 w (output) 906 4764 w (is) 1193 4764 w (a) 1291 4764 w (PAM) 1366 4764 w (with) 1614 4764 w (tuple) 1823 4764 w (type) 2054 4764 w (BLACKANDWHITE.) 2257 4764 w (You) 3189 4764 w (can) 3392 4764 w (turn) 3561 4764 w (this) 3753 4764 w (into) 3929 4764 w (a) 4116 4764 w (PBM) 4191 4764 w (\(if) 4434 4764 w (you) 4560 4764 w (need) 4742 4764 w (to) 4962 4764 w (use it with an older program that doesn't understand PAM\) with) 720 4884 w 10 /Times-Bold f (pamtopnm) 3309 4884 w 10 /Times-Roman f (.) 3776 4884 w (The output is to Standard Output.) 720 5040 w (Another way to convert a grayscale image to black and white is to dither.) 720 5196 w (Dithering) 3693 5196 w (is) 4102 5196 w (using) 4195 5196 w (clustered) 4438 5196 w (black) 4824 5196 w (and) 720 5316 w (white) 897 5316 w (pixels) 1152 5316 w (such) 1424 5316 w (that) 1640 5316 w (if) 1823 5316 w (you) 1917 5316 w (step) 2100 5316 w (back) 2294 5316 w (and) 2515 5316 w (look) 2692 5316 w (at) 2903 5316 w (the) 3008 5316 w (picture,) 3163 5316 w (you) 3498 5316 w (see) 3681 5316 w (varying) 3841 5316 w (levels) 4179 5316 w (of) 4444 5316 w (gray.) 4559 5316 w 10 /Times-Bold f (pam\255) 4818 5316 w (ditherbw) 720 5436 w 10 /Times-Roman f (does dithering.) 1134 5436 w 10 /Times-Bold f (OPTIONS) 720 5676 w 10 /Times-Roman f (Without) 720 5868 w (any) 1074 5868 w (options,) 1244 5868 w 10 /Times-Bold f (pamthreshold) 1590 5868 w 10 /Times-Roman f (uses) 2211 5868 w (an) 2409 5868 w (iterative) 2529 5868 w (algorithm) 2882 5868 w (found) 3297 5868 w (in) 3556 5868 w (the) 3660 5868 w (wikipedia) 3809 5868 w (article) 4230 5868 w 10 /Times-Italic f (Thresholding) 4506 5868 w (\(image) 720 5988 w (processing\)) 1042 5988 w 10 /Times-Roman f (to) 1552 5988 w (compute) 1674 5988 w (the) 2062 5988 w (thresholding) 2228 5988 w (value.) 2772 5988 w (It) 3082 5988 w (uses) 3187 5988 w (this) 3403 5988 w (threshold) 3592 5988 w (to) 4008 5988 w (globally) 4130 5988 w (threshold) 4502 5988 w (the) 4918 5988 w (image.) 720 6108 w (This) 1043 6108 w (should) 1250 6108 w (work) 1546 6108 w (well) 1780 6108 w (for) 1981 6108 w (most) 2126 6108 w (images.) 2351 6108 w (The) 2714 6108 w (program) 2899 6108 w (issues) 3267 6108 w (a) 3536 6108 w (message) 3610 6108 w (telling) 3978 6108 w (you) 4264 6108 w (what) 4444 6108 w (threshold) 4668 6108 w (it) 720 6228 w (used.) 812 6228 w (\(Netpbm) 1081 6228 w (messages) 1472 6228 w (go) 1885 6228 w (to) 2021 6228 w (Standard) 2135 6228 w (Error,) 2526 6228 w (and) 2797 6228 w (you) 2977 6228 w (can) 3163 6228 w (turn) 3337 6228 w (them) 3533 6228 w (off) 3768 6228 w (with) 3919 6228 w (the) 4132 6228 w (Netpbm) 4289 6228 w (command) 4646 6228 w (option) 720 6348 w 10 /Times-Bold f (\255quiet) 1001 6348 w 10 /Times-Roman f (\).) 1251 6348 w 10 /Times-Bold f (\255simple) 970 6504 w 10 /Times-Roman f (This) 1281 6504 w (selects) 1498 6504 w (simple) 1803 6504 w (or) 2109 6504 w (global) 2231 6504 w (thresholding,) 2520 6504 w (i.e.) 3084 6504 w 10 /Times-Bold f (pamthreshold) 3245 6504 w 10 /Times-Roman f (compares) 3879 6504 w (every) 4300 6504 w (pixel) 4560 6504 w (to) 4800 6504 w (the) 4918 6504 w (threshold) 1220 6624 w (you) 1618 6624 w (specify) 1794 6624 w (with) 2108 6624 w 10 /Times-Bold f (\255threshold) 2311 6624 w 10 /Times-Roman f (.) 2750 6624 w (This works well for black and white text pages scanned) 2825 6624 w (with) 1220 6744 w (a) 1440 6744 w (flatbed) 1526 6744 w (scanner) 1845 6744 w (and) 2192 6744 w (is) 2379 6744 w (faster) 2489 6744 w (than) 2753 6744 w (the) 2968 6744 w (default) 3133 6744 w (method) 3453 6744 w (that) 3796 6744 w (iteratively) 3989 6744 w (determines) 4437 6744 w (the) 4918 6744 w (thresholding value first.) 1220 6864 w 10 /Times-Bold f (\255local=) 970 7020 w 10 /Times-Italic f (width) 1260 7020 w 10 /Times-Bold f (x) 1483 7020 w 10 /Times-Italic f (height) 1533 7020 w 10 /Times-Roman f (This) 1783 7020 w (selects) 2000 7020 w (local) 2305 7020 w (adaptive) 2538 7020 w (thresholding) 2915 7020 w (\(also) 3454 7020 w (known) 3688 7020 w (as) 4000 7020 w (dynamic) 4123 7020 w (thresholding\)) 4507 7020 w (using) 1220 7140 w (the) 1469 7140 w (neighborhood) 1623 7140 w (of) 2210 7140 w 10 /Times-Italic f (width) 2325 7140 w 10 /Times-Roman f (and) 2580 7140 w 10 /Times-Italic f (height) 2756 7140 w 10 /Times-Roman f (around) 3037 7140 w (every) 3345 7140 w (pixel.) 3597 7140 w 10 /Times-Bold f (pamthreshold) 3878 7140 w 10 /Times-Roman f (computes) 4504 7140 w (the) 4918 7140 w (threshold) 1220 7260 w (individually) 1626 7260 w (for) 2145 7260 w (each) 2296 7260 w (pixel) 2513 7260 w (of) 2748 7260 w (the) 2866 7260 w (image.) 3023 7260 w (This) 3352 7260 w (can) 3565 7260 w (accommodate) 3738 7260 w (changing) 4327 7260 w (lighting) 4728 7260 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 (conditions in the image.) 1220 840 w (Depending on the size of the neighborhood this can be quite slow.) 2231 840 w 10 /Times-Bold f (\255dual=) 970 996 w 10 /Times-Italic f (width) 1250 996 w 10 /Times-Bold f (x) 1473 996 w 10 /Times-Italic f (height) 1523 996 w 10 /Times-Roman f (This) 1773 996 w (selects) 1983 996 w (a) 2281 996 w (dual) 2357 996 w (thresholding) 2561 996 w (algorithm) 3094 996 w (using) 3516 996 w (a) 3766 996 w (global) 3843 996 w (threshold) 4126 996 w (for) 4531 996 w (low) 4680 996 w (con\255) 4863 996 w (trast) 1220 1116 w (neighborhoods) 1427 1116 w (and) 2056 1116 w (local) 2235 1116 w (thresholding) 2464 1116 w (otherwise.) 2999 1116 w (This) 3472 1116 w (can) 3685 1116 w (preserve) 3858 1116 w (larger) 4230 1116 w (back\255) 4497 1116 w (respec\255) 4753 1116 w (tively) 1220 1236 w (foreground) 1481 1236 w (areas) 1957 1236 w (than) 2194 1236 w (local) 2399 1236 w (adaptive) 2626 1236 w (thresholding.) 2998 1236 w (This) 3582 1236 w (algorithm) 3794 1236 w (was) 4217 1236 w (proposed) 4406 1236 w (in) 4806 1236 w (the) 4918 1236 w (paper "An Approach To Licence Plate Recognition" by J.R. Parker and Pavol Federl.) 1220 1356 w 10 /Times-Bold f (\255threshold=) 970 1512 w 10 /Times-Italic f (threshold) 1466 1512 w 10 /Times-Roman f (This) 1844 1512 w (sets) 2048 1512 w (the) 2224 1512 w (thresholding) 2372 1512 w (value) 2898 1512 w (for) 3140 1512 w (simple) 3282 1512 w (or) 3575 1512 w (local) 3684 1512 w (thresholding.) 3904 1512 w (The) 4480 1512 w (value) 4661 1512 w (is) 4903 1512 w (a) 4996 1512 w (floating point number in the range [0, 1], where 0 is black and 1 is the maxval of the image.) 1220 1632 w (If) 970 1788 w (you) 1071 1788 w (don't) 1256 1788 w (specify) 1502 1788 w (this) 1825 1788 w (option,) 2005 1788 w 10 /Times-Bold f (pamthreshold) 2321 1788 w 10 /Times-Roman f (uses) 2951 1788 w (a) 3159 1788 w (threshold) 3239 1788 w (of) 3647 1788 w (0.5.) 3766 1788 w (Without) 3977 1788 w 10 /Times-Bold f (\255simple) 4341 1788 w 10 /Times-Roman f (or) 4688 1788 w 10 /Times-Bold f (\255local) 4807 1788 w 10 /Times-Roman f (this option is meaningless.) 970 1908 w 10 /Times-Bold f (\255contrast=) 970 2064 w 10 /Times-Italic f (threshold) 1409 2064 w 10 /Times-Roman f (This) 1787 2064 w (sets) 1991 2064 w (the) 2167 2064 w (threshold) 2315 2064 w (to) 2713 2064 w (determine) 2817 2064 w (if) 3242 2064 w (a) 3329 2064 w (neighborhood) 3399 2064 w (has) 3980 2064 w (low) 4139 2064 w (contrast) 4316 2064 w (or) 4659 2064 w (not) 4769 2064 w (for) 4924 2064 w (dual thresholding.) 1220 2184 w (The value is a floating point number in the range [0, 1].) 1992 2184 w (If) 970 2340 w (you) 1064 2340 w (don't) 1242 2340 w (specify) 1481 2340 w (this) 1797 2340 w (option,) 1970 2340 w 10 /Times-Bold f (pamthreshold) 2279 2340 w 10 /Times-Roman f (uses) 2902 2340 w (a) 3102 2340 w (contrast) 3174 2340 w (threshold) 3519 2340 w (of) 3920 2340 w (0.05.) 4032 2340 w (Without) 4286 2340 w 10 /Times-Bold f (\255dual) 4643 2340 w 10 /Times-Roman f (this) 4895 2340 w (option is meaningless.) 970 2460 w 10 /Times-Bold f (SEE ALSO) 720 2700 w (pamditherbw) 720 2856 w 10 /Times-Roman f (,) 1298 2856 w 10 /Times-Bold f (ppmtopgm) 1348 2856 w 10 /Times-Roman f (,) 1815 2856 w 10 /Times-Bold f (pamtopnm) 1865 2856 w 10 /Times-Roman f (,) 2332 2856 w 10 /Times-Bold f (pam) 2382 2856 w (HISTORY) 720 3096 w (pamthreshold) 720 3288 w 10 /Times-Roman f (was new in Netpbm 10.34 \(June 2006\).) 1340 3288 w 10 /Times-Bold f (AUTHOR) 720 3528 w (pamthreshold) 720 3720 w 10 /Times-Roman f (is Copyright © 2006 by Erik Auerswald and released under the GPL.) 1340 3720 w 10 /S1 f (________________________________________________________________________) 720 3840 w 10 /Times-Bold f (Table Of Contents) 720 4080 w 10 /LucidaSansUnicode22 f (\031) 720 4272 w 10 /Times-Roman f (NAME) 970 4272 w 10 /LucidaSansUnicode22 f (\031) 720 4428 w 10 /Times-Roman f (SYNOPSIS) 970 4428 w 10 /LucidaSansUnicode22 f (\031) 720 4584 w 10 /Times-Roman f (OPTIONS) 970 4584 w 10 /LucidaSansUnicode22 f (\031) 720 4740 w 10 /Times-Roman f (DESCRIPTION) 970 4740 w 10 /LucidaSansUnicode22 f (\031) 720 4896 w 10 /Times-Roman f (SEE ALSO) 970 4896 w 10 /LucidaSansUnicode22 f (\031) 720 5052 w 10 /Times-Roman f (HISTORY) 970 5052 w 10 /LucidaSansUnicode22 f (\031) 720 5208 w 10 /Times-Roman f (AUTHOR) 970 5208 w cleartomark showpage saveobj restore %%EndPage: 2 2 %%Trailer done %%DocumentFonts: Times-Roman LucidaSansUnicode22 Times-Italic Times-Bold S1 %%Pages: 2