%!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 (Pamcomp User) 2273 1230 w (Manual) 3085 1230 w 10 /Times-Bold f (pamcomp) 720 1920 w 10 /Times-Roman f (Updated: 17 July 2004) 720 2076 w (Table Of Contents) 720 2196 w 10 /Times-Bold f (NAME) 720 2436 w 10 /Times-Roman f (pamcomp \255 composite \(overlay\) two Netpbm images together) 720 2592 w 10 /Times-Bold f (SYNOPSIS) 720 2832 w (pamcomp) 720 2988 w 10 /Times-Roman f ([) 1167 2988 w 10 /Times-Bold f (\255align=) 1200 2988 w 10 /Times-Roman f ({) 1502 2988 w 10 /Times-Bold f (left) 1550 2988 w 10 /S f (\357) 1688 2988 w 10 /Times-Bold f (center) 1737 2988 w 10 /S f (\357) 2002 2988 w 10 /Times-Bold f (right) 2051 2988 w 10 /S f (\357) 2262 2988 w 10 /Times-Bold f (beyondleft) 2336 2988 w 10 /S f (\357) 2786 2988 w 10 /Times-Bold f (beyondright) 2835 2988 w 10 /Times-Roman f (}]) 3358 2988 w ([) 720 3108 w 10 /Times-Bold f (\255valign=) 753 3108 w 10 /Times-Roman f ({) 1105 3108 w 10 /Times-Bold f (top) 1153 3108 w 10 /S f (\357) 1292 3108 w 10 /Times-Bold f (middle) 1341 3108 w 10 /S f (\357) 1636 3108 w 10 /Times-Bold f (bottom) 1685 3108 w 10 /S f (\357) 1990 3108 w 10 /Times-Bold f (above) 2064 3108 w 10 /S f (\357) 2314 3108 w 10 /Times-Bold f (below) 2363 3108 w 10 /Times-Roman f (}]) 2613 3108 w ([) 720 3228 w 10 /Times-Bold f (\255xoff=) 753 3228 w 10 /Times-Italic f (X) 1009 3228 w 10 /Times-Roman f (] [) 1070 3228 w 10 /Times-Bold f (\255yoff=) 1161 3228 w 10 /Times-Italic f (Y) 1417 3228 w 10 /Times-Roman f (]) 1473 3228 w ([) 720 3348 w 10 /Times-Bold f (\255alpha=) 753 3348 w 10 /Times-Italic f (alpha\255pgmfile) 1083 3348 w 10 /Times-Roman f (] [) 1644 3348 w 10 /Times-Bold f (\255invert) 1735 3348 w 10 /Times-Roman f (] [) 2023 3348 w 10 /Times-Bold f (\255opacity=) 2114 3348 w 10 /Times-Italic f (opacity) 2515 3348 w 10 /Times-Roman f (] [) 2809 3348 w 10 /Times-Bold f (\255linear) 2900 3348 w 10 /Times-Roman f (]) 3183 3348 w 10 /Times-Italic f (overlay) 720 3468 w 10 /S f (_) 1019 3468 w 10 /Times-Italic f (file) 1069 3468 w 10 /Times-Roman f ([) 1222 3468 w 10 /Times-Italic f (underlying) 1255 3468 w 10 /S f (_) 1688 3468 w 10 /Times-Italic f (file) 1738 3468 w 10 /Times-Roman f ([) 1891 3468 w 10 /Times-Italic f (output) 1924 3468 w 10 /S f (_) 2180 3468 w 10 /Times-Italic f (file) 2230 3468 w 10 /Times-Roman f (]]) 2358 3468 w (Minimum) 720 3624 w (unique) 1162 3624 w (abbreviation) 1475 3624 w (of) 2015 3624 w (option) 2140 3624 w (is) 2438 3624 w (acceptable.) 2547 3624 w (You) 3059 3624 w (may) 3273 3624 w (use) 3487 3624 w (double) 3662 3624 w (hyphens) 3976 3624 w (instead) 4351 3624 w (of) 4676 3624 w (single) 4801 3624 w (hyphen) 720 3744 w (to) 1042 3744 w (denote) 1148 3744 w (options.) 1442 3744 w (You) 1815 3744 w (may) 2015 3744 w (use) 2215 3744 w (white) 2376 3744 w (space) 2626 3744 w (in) 2875 3744 w (place) 2981 3744 w (of) 3219 3744 w (the) 3330 3744 w (equals) 3480 3744 w (sign) 3763 3744 w (to) 3958 3744 w (separate) 4064 3744 w (an) 4418 3744 w (option) 4540 3744 w (name) 4824 3744 w (from its value.) 720 3864 w 10 /Times-Bold f (DESCRIPTION) 720 4104 w 10 /Times-Roman f (This) 720 4296 w (program) 924 4296 w (is) 1288 4296 w (part) 1381 4296 w (of) 1562 4296 w (Netpbm.) 1671 4296 w 10 /Times-Bold f (pamcomp) 2070 4296 w 10 /Times-Roman f (reads) 2519 4296 w (two) 2756 4296 w (images) 2933 4296 w (and) 3243 4296 w (produces) 3414 4296 w (a) 3801 4296 w (composite) 3872 4296 w (image) 4310 4296 w (with) 4581 4296 w (one) 4786 4296 w (of) 4957 4296 w (the) 720 4416 w (images) 878 4416 w (overlayed) 1197 4416 w (on) 1626 4416 w (top) 1762 4416 w (of) 1926 4416 w (the) 2045 4416 w (other,) 2203 4416 w (possible) 2469 4416 w (translucently.) 2833 4416 w (The) 3435 4416 w (images) 3626 4416 w (need) 3945 4416 w (not) 4169 4416 w (be) 4333 4416 w (the) 4463 4416 w (same) 4620 4416 w (size.) 4860 4416 w (The input and outputs are Netpbm format image files.) 720 4536 w (In) 720 4692 w (its) 829 4692 w (simplest) 950 4692 w (use,) 1310 4692 w 10 /Times-Bold f (pamcomp) 1494 4692 w 10 /Times-Roman f (simply) 1942 4692 w (places) 2241 4692 w (the) 2516 4692 w (image) 2664 4692 w (in) 2934 4692 w (the) 3038 4692 w (file) 3186 4692 w 10 /Times-Italic f (overlay) 3345 4692 w 10 /S f (_) 3644 4692 w 10 /Times-Italic f (file) 3694 4692 w 10 /Times-Roman f (on) 3848 4692 w (top) 3974 4692 w (of) 4128 4692 w (the) 4237 4692 w (image) 4385 4692 w (in) 4655 4692 w (the) 4759 4692 w (file) 4907 4692 w 10 /Times-Italic f (underlying) 720 4812 w 10 /S f (_) 1153 4812 w 10 /Times-Italic f (file) 1203 4812 w 10 /Times-Roman f (, blocking out the part of) 1331 4812 w 10 /Times-Italic f (underlying) 2344 4812 w 10 /S f (_) 2777 4812 w 10 /Times-Italic f (file) 2827 4812 w 10 /Times-Roman f (beneath it.) 2980 4812 w (If) 720 4968 w (you) 814 4968 w (add) 992 4968 w (the) 1164 4968 w 10 /Times-Bold f (\255alpha) 1314 4968 w 10 /Times-Roman f (option,) 1615 4968 w (then) 1924 4968 w 10 /Times-Bold f (pamcomp) 2124 4968 w 10 /Times-Roman f (uses) 2574 4968 w (the) 2774 4968 w (image) 2924 4968 w (in) 3196 4968 w (file) 3302 4968 w 10 /Times-Italic f (alpha\255pgmfile) 3463 4968 w 10 /Times-Roman f (as) 4052 4968 w (an) 4163 4968 w (alpha) 4286 4968 w (mask,) 4531 4968 w (which) 4796 4968 w (means) 720 5088 w (it) 1012 5088 w (determines) 1105 5088 w (the) 1580 5088 w (level) 1739 5088 w (of) 1970 5088 w (transparency) 2090 5088 w (of) 2636 5088 w (each) 2756 5088 w (point) 2975 5088 w (in) 3218 5088 w (the) 3332 5088 w (overlay) 3490 5088 w (image.) 3825 5088 w (The) 4155 5088 w (alpha) 4346 5088 w (mask) 4598 5088 w (must) 4845 5088 w (have) 720 5208 w (the) 935 5208 w (same) 1084 5208 w (dimensions) 1317 5208 w (as) 1801 5208 w (the) 1912 5208 w (overlay) 2062 5208 w (image.) 2389 5208 w (In) 2711 5208 w (places) 2822 5208 w (where) 3099 5208 w (the) 3370 5208 w (alpha) 3520 5208 w (mask) 3764 5208 w (defines) 4003 5208 w (the) 4319 5208 w (overlay) 4469 5208 w (image) 4796 5208 w (to) 720 5328 w (be) 824 5328 w (opaque,) 944 5328 w (the) 1283 5328 w (composite) 1431 5328 w (output) 1868 5328 w (contains) 2150 5328 w (only) 2509 5328 w (the) 2713 5328 w (contents) 2861 5328 w (of) 3220 5328 w (the) 3329 5328 w (overlay) 3477 5328 w (image; the underlying image is) 3802 5328 w (totally) 720 5448 w (blocked) 1006 5448 w (out.) 1353 5448 w (In) 1562 5448 w (places) 1676 5448 w (where) 1956 5448 w (the) 2230 5448 w (alpha) 2383 5448 w (mask) 2630 5448 w (defines) 2872 5448 w (the) 3191 5448 w (overlay) 3344 5448 w (image) 3674 5448 w (to) 3949 5448 w (be) 4058 5448 w (transparent,) 4183 5448 w (the) 4682 5448 w (com\255) 4835 5448 w (posite) 720 5568 w (output) 1001 5568 w (contains) 1299 5568 w (none) 1674 5568 w (of) 1910 5568 w (the) 2035 5568 w (overlay) 2199 5568 w (image;) 2540 5568 w (the) 2854 5568 w (underlying) 3018 5568 w (image) 3493 5568 w (shows) 3779 5568 w (through) 4070 5568 w (completely.) 4422 5568 w (In) 4957 5568 w (places) 720 5688 w (where) 997 5688 w (the) 1268 5688 w (alpha) 1418 5688 w (mask) 1662 5688 w (shows) 1901 5688 w (a) 2179 5688 w (value) 2252 5688 w (in) 2497 5688 w (between) 2604 5688 w (opaque) 2965 5688 w (and) 3282 5688 w (transparent) 3455 5688 w (\(translucence\),) 3927 5688 w (the) 4545 5688 w (compos\255) 4696 5688 w (ite) 720 5808 w (image) 853 5808 w (contains) 1130 5808 w (a) 1496 5808 w (mixture) 1573 5808 w (of) 1917 5808 w (the) 2033 5808 w (overlay) 2188 5808 w (image) 2520 5808 w (and) 2797 5808 w (the) 2974 5808 w (underlying) 3129 5808 w (image) 3595 5808 w (and) 3871 5808 w (the) 4047 5808 w (level) 4201 5808 w (of) 4427 5808 w (translucence) 4542 5808 w (determines how much of each.) 720 5928 w (The) 720 6084 w (alpha) 902 6084 w (mask) 1145 6084 w (is) 1383 6084 w (a) 1477 6084 w (PGM) 1548 6084 w (file) 1792 6084 w (in) 1952 6084 w (which) 2057 6084 w (a) 2328 6084 w (white) 2399 6084 w (pixel) 2648 6084 w (represents) 2875 6084 w (opaqueness) 3306 6084 w (and) 3793 6084 w (a) 3964 6084 w (black) 4035 6084 w (pixel) 4278 6084 w (transparency.) 4506 6084 w (Anything) 720 6204 w (in) 1130 6204 w (between) 1240 6204 w (is) 1604 6204 w (translucent.) 1703 6204 w (\(Like) 2223 6204 w (any) 2471 6204 w (Netpbm) 2647 6204 w (program,) 3001 6204 w 10 /Times-Bold f (pamcomp) 3396 6204 w 10 /Times-Roman f (will) 3850 6204 w (see) 4038 6204 w (a) 4197 6204 w (PBM) 4273 6204 w (file) 4516 6204 w (as) 4680 6204 w (if) 4794 6204 w (it) 4886 6204 w (is) 4973 6204 w (PGM\).) 720 6324 w (If) 720 6480 w (the) 825 6480 w (overlay) 986 6480 w (image) 1324 6480 w (is) 1607 6480 w (a) 1713 6480 w (PAM) 1796 6480 w (image) 2052 6480 w (of) 2335 6480 w (tuple) 2457 6480 w (type) 2696 6480 w (RGB) 2907 6480 w 10 /S f (_) 3113 6480 w 10 /Times-Roman f (ALPHA) 3163 6480 w (or) 3535 6480 w (GRAYSCALE) 3658 6480 w 10 /S f (_) 4258 6480 w 10 /Times-Roman f (ALPHA,) 4308 6480 w (then) 4706 6480 w (the) 4918 6480 w (overlay) 720 6600 w (image) 1056 6600 w (contains) 1337 6600 w (transparency) 1707 6600 w (information) 2253 6600 w (itself) 2762 6600 w (and) 2999 6600 w 10 /Times-Bold f (pamcomp) 3180 6600 w 10 /Times-Roman f (uses) 3639 6600 w (it) 3848 6600 w (the) 3941 6600 w (same) 4100 6600 w (way) 4342 6600 w (as) 4545 6600 w (the) 4665 6600 w (alpha) 4824 6600 w (mask) 720 6720 w (described) 957 6720 w (above.) 1365 6720 w (If) 1679 6720 w (you) 1771 6720 w (supply) 1947 6720 w (both) 2240 6720 w (an) 2444 6720 w (overlay) 2564 6720 w (image) 2889 6720 w (that) 3160 6720 w (has) 3337 6720 w (transparency) 3497 6720 w (information) 4033 6720 w (and) 4532 6720 w (an) 4703 6720 w (alpha) 4824 6720 w (mask,) 720 6840 w 10 /Times-Bold f (pamcomp) 981 6840 w 10 /Times-Roman f (multiplies the two opacities to get the opacity of the overlay pixel.) 1428 6840 w (Before) 720 6996 w (Netpbm) 1018 6996 w (10.25) 1367 6996 w (\(October) 1619 6996 w (2004\),) 2000 6996 w 10 /Times-Bold f (pamcomp) 2285 6996 w 10 /Times-Roman f (did) 2734 6996 w (not) 2889 6996 w (recognize) 3044 6996 w (the) 3458 6996 w (transparency) 3608 6996 w (information) 4145 6996 w (in) 4645 6996 w (a) 4751 6996 w (PAM) 4823 6996 w (image) 720 7116 w (\255\255) 996 7116 w (it) 1094 7116 w (just) 1182 7116 w (ignored) 1359 7116 w (it.) 1696 7116 w (So) 1834 7116 w (people) 1972 7116 w (had) 2270 7116 w (to) 2446 7116 w (make) 2556 7116 w (appropriate) 2803 7116 w (alpha) 3288 7116 w (masks) 3535 7116 w (in) 3816 7116 w (order) 3925 7116 w (to) 4166 7116 w (have) 4275 7116 w (a) 4494 7116 w (non\255opaque) 4569 7116 w (overlay.) 720 7236 w (Some) 1099 7236 w (Netpbm) 1358 7236 w (programs) 1711 7236 w (that) 2119 7236 w (convert) 2300 7236 w (from) 2630 7236 w (image) 2855 7236 w (formats) 3130 7236 w (such) 3466 7236 w (as) 3680 7236 w (PNG) 3794 7236 w (that) 4025 7236 w (contain) 4206 7236 w (transparency) 4531 7236 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 (information) 720 840 w (are) 1225 840 w (not) 1379 840 w (able) 1540 840 w (to) 1739 840 w (create) 1850 840 w (RGB) 2120 840 w 10 /S f (_) 2326 840 w 10 /Times-Roman f (ALPHA) 2376 840 w (or) 2742 840 w (GRAYSCALE) 2858 840 w 10 /S f (_) 3458 840 w 10 /Times-Roman f (ALPHA) 3508 840 w (PAM) 3874 840 w (output,) 4124 840 w (so) 4438 840 w (you) 4560 840 w (have) 4742 840 w (to) 4962 840 w (use) 720 960 w (the) 880 960 w (old) 1029 960 w (method) 1184 960 w (\255\255) 1512 960 w (extract) 1606 960 w (the) 1905 960 w (transparency) 2055 960 w (information) 2592 960 w (from) 3092 960 w (the) 3314 960 w (original) 3464 960 w (into) 3803 960 w (a) 3987 960 w (separate) 4059 960 w (alpha) 4413 960 w (mask) 4657 960 w (and) 4896 960 w (use that as input to) 720 1080 w 10 /Times-Bold f (pamcomp) 1495 1080 w 10 /Times-Roman f (.) 1917 1080 w (The) 720 1236 w (output) 902 1236 w (image) 1185 1236 w (is) 1457 1236 w (always) 1552 1236 w (of) 1857 1236 w (the) 1968 1236 w (same) 2118 1236 w (dimensions) 2351 1236 w (as) 2835 1236 w (the) 2946 1236 w (underlying) 3096 1236 w (image.) 3557 1236 w 10 /Times-Bold f (pamcomp) 3879 1236 w 10 /Times-Roman f (uses) 4329 1236 w (only) 4529 1236 w (parts) 4735 1236 w (of) 4957 1236 w (the overlay image that fit within the underlying image.) 720 1356 w (To) 720 1512 w (specify) 865 1512 w (where) 1187 1512 w (on) 1464 1512 w (the) 1598 1512 w (underlying) 1754 1512 w (image) 2221 1512 w (to) 2499 1512 w (place) 2612 1512 w (the) 2857 1512 w (overlay) 3014 1512 w (image,) 3348 1512 w (use) 3652 1512 w (the) 3820 1512 w 10 /Times-Bold f (\255align) 3977 1512 w 10 /Times-Roman f (,) 4222 1512 w 10 /Times-Bold f (\255valign) 4282 1512 w 10 /Times-Roman f (,) 4577 1512 w 10 /Times-Bold f (\255xoff) 4637 1512 w 10 /Times-Roman f (,) 4836 1512 w (and) 4896 1512 w 10 /Times-Bold f (\255yoff) 720 1632 w 10 /Times-Roman f (options.) 956 1632 w (Without) 1338 1632 w (these) 1703 1632 w (options,) 1945 1632 w (the) 2302 1632 w (default) 2461 1632 w (horizontal) 2775 1632 w (position) 3217 1632 w (is) 3577 1632 w (flush) 3681 1632 w (left) 3918 1632 w (and) 4088 1632 w (the) 4269 1632 w (default) 4428 1632 w (vertical) 4741 1632 w (position is flush top.) 720 1752 w (The) 720 1908 w (overlay) 910 1908 w (image,) 1244 1908 w (in) 1549 1908 w (the) 1663 1908 w (position) 1821 1908 w (you) 2180 1908 w (specify,) 2366 1908 w (need) 2715 1908 w (not) 2939 1908 w (fit) 3103 1908 w (entirely) 3228 1908 w (within) 3569 1908 w (the) 3861 1908 w (underlying) 4019 1908 w (image.) 4488 1908 w 10 /Times-Bold f (pam\255) 4818 1908 w (comp) 720 2028 w 10 /Times-Roman f (uses) 989 2028 w (only) 1197 2028 w (the) 1411 2028 w (parts) 1569 2028 w (of) 1799 2028 w (the) 1918 2028 w (overlay) 2076 2028 w (image) 2410 2028 w (that) 2689 2028 w (appear) 2874 2028 w (above) 3174 2028 w (the) 3447 2028 w (underlying) 3604 2028 w (image.) 4072 2028 w (It) 4401 2028 w (is) 4497 2028 w (possible) 4599 2028 w (to) 4962 2028 w (specify) 720 2148 w (positioning) 1040 2148 w (such) 1523 2148 w (that) 1738 2148 w (none) 1920 2148 w (of) 2146 2148 w (the) 2261 2148 w (overlay) 2415 2148 w (image) 2747 2148 w (is) 3024 2148 w (over) 3124 2148 w (the) 3334 2148 w (underlying) 3489 2148 w (image) 3955 2148 w (\255\255) 4232 2148 w (i.e.) 4331 2148 w (the) 4486 2148 w (overlay) 4641 2148 w (is) 4973 2148 w (out of frame.) 720 2268 w (If you do that,) 1288 2268 w 10 /Times-Bold f (pamcomp) 1879 2268 w 10 /Times-Roman f (issues a warning.) 2326 2268 w (The) 745 2424 w (overlay) 928 2424 w (and) 1255 2424 w (underlying) 1427 2424 w (images) 1888 2424 w (may) 2199 2424 w (be) 2399 2424 w (of) 2521 2424 w (different) 2632 2424 w (formats) 3003 2424 w (\(e.g.) 3337 2424 w (overlaying) 3568 2424 w (a) 4024 2424 w (PBM) 4097 2424 w (text) 4338 2424 w (image) 4517 2424 w (over) 4790 2424 w (a) 4996 2424 w (full) 720 2544 w (color) 886 2544 w (PPM) 1118 2544 w (image\)) 1346 2544 w (and) 1649 2544 w (have) 1819 2544 w (different) 2033 2544 w (maxvals.) 2402 2544 w (The) 2811 2544 w (output) 2992 2544 w (image) 3274 2544 w (has) 3544 2544 w (the) 3703 2544 w (more) 3851 2544 w (general) 4082 2544 w (of) 4401 2544 w (the) 4510 2544 w (two) 4658 2544 w (input) 4834 2544 w (formats) 720 2664 w (and) 1056 2664 w (a) 1231 2664 w (maxval) 1306 2664 w (that) 1631 2664 w (is) 1812 2664 w (the) 1910 2664 w (least) 2063 2664 w (common) 2277 2664 w (multiple) 2658 2664 w (the) 3023 2664 w (two) 3176 2664 w (maxvals) 3357 2664 w (\(or) 3721 2664 w (the) 3868 2664 w (maximum) 4021 2664 w (maxval) 4459 2664 w (allow\255) 4785 2664 w (able by the format, if the LCM is more than that\).) 720 2784 w 10 /Times-Bold f (OPTIONS) 720 3024 w (\255align=) 970 3216 w 10 /Times-Italic f (alignment) 1272 3216 w 10 /Times-Roman f (This option selects the basic horizontal position of the overlay image with) 1672 3216 w (respect) 4654 3216 w (to) 4962 3216 w (the) 1220 3336 w (underlying) 1381 3336 w (image,) 1853 3336 w (in) 2161 3336 w (syntax) 2278 3336 w (reminiscent) 2578 3336 w (of) 3083 3336 w (HTML.) 3205 3336 w 10 /Times-Bold f (left) 3577 3336 w 10 /Times-Roman f (means) 3754 3336 w (flush) 4048 3336 w (left,) 4286 3336 w 10 /Times-Bold f (center) 4482 3336 w 10 /Times-Roman f (means) 4785 3336 w (centered, and) 1220 3456 w 10 /Times-Bold f (right) 1776 3456 w 10 /Times-Roman f (means flush right.) 2012 3456 w (The) 970 3612 w 10 /Times-Bold f (\255xoff) 1159 3612 w 10 /Times-Roman f (option) 1392 3612 w (modifies) 1682 3612 w (this) 2066 3612 w (position.) 2245 3612 w 10 /Times-Bold f (beyondleft) 2652 3612 w 10 /Times-Roman f (means) 3137 3612 w (just) 3427 3612 w (out) 3607 3612 w (of) 3770 3612 w (frame) 3888 3612 w (to) 4155 3612 w (the) 4268 3612 w (left) 4425 3612 w (\255\255) 4593 3612 w (the) 4694 3612 w (right) 4851 3612 w (edge) 970 3732 w (of) 1190 3732 w (the) 1305 3732 w (overlay) 1459 3732 w (is) 1790 3732 w (flush) 1889 3732 w (with) 2120 3732 w (the) 2329 3732 w (left) 2482 3732 w (edge) 2646 3732 w (of) 2865 3732 w (the) 2979 3732 w (underlying) 3132 3732 w (image.) 3596 3732 w 10 /Times-Bold f (beyondright) 3896 3732 w 10 /Times-Roman f (means) 4450 3732 w (just) 4736 3732 w (out) 4912 3732 w (of) 970 3852 w (frame) 1080 3852 w (to) 1339 3852 w (the) 1444 3852 w (right.) 1593 3852 w (These) 1859 3852 w (alignments) 2125 3852 w (are) 2592 3852 w (useful) 2741 3852 w (only) 3013 3852 w (if) 3219 3852 w (you) 3308 3852 w (add) 3486 3852 w (a) 3658 3852 w 10 /Times-Bold f (\255xoff) 3730 3852 w 10 /Times-Roman f (option.) 3957 3852 w (These) 4341 3852 w (two) 4607 3852 w (values) 4785 3852 w (were added in Netpbm 10.10 \(October 2002\).) 970 3972 w (The default is) 970 4128 w 10 /Times-Bold f (left) 1544 4128 w 10 /Times-Roman f (.) 1682 4128 w 10 /Times-Bold f (\255valign=) 970 4284 w 10 /Times-Italic f (alignment) 1322 4284 w 10 /Times-Roman f (This) 1722 4284 w (option) 1929 4284 w (selects) 2214 4284 w (the) 2509 4284 w (basic) 2660 4284 w (vertical) 2894 4284 w (position) 3222 4284 w (of) 3574 4284 w (the) 3687 4284 w (overlay) 3839 4284 w (image) 4168 4284 w (with) 4442 4284 w (respect) 4650 4284 w (to) 4962 4284 w (the) 1220 4404 w (underlying) 1379 4404 w (image,) 1849 4404 w (in) 2155 4404 w (syntax) 2270 4404 w (reminiscent) 2568 4404 w (of) 3071 4404 w (HTML.) 3191 4404 w 10 /Times-Bold f (top) 3561 4404 w 10 /Times-Roman f (means) 3737 4404 w (flush) 4029 4404 w (top,) 4265 4404 w 10 /Times-Bold f (middle) 4454 4404 w 10 /Times-Roman f (means) 4785 4404 w (centered, and) 1220 4524 w 10 /Times-Bold f (bottom) 1776 4524 w 10 /Times-Roman f (means flush bottom.) 2106 4524 w (The) 970 4680 w 10 /Times-Bold f (\255yoff) 1153 4680 w 10 /Times-Roman f (option) 1380 4680 w (modifies) 1664 4680 w (this) 2042 4680 w (position.) 2215 4680 w 10 /Times-Bold f (above) 2616 4680 w 10 /Times-Roman f (means) 2894 4680 w (just) 3177 4680 w (out) 3350 4680 w (of) 3506 4680 w (frame) 3617 4680 w (to) 3878 4680 w (the) 3985 4680 w (top) 4136 4680 w (\255\255) 4293 4680 w (the) 4388 4680 w (bottom) 4539 4680 w (edge) 4852 4680 w (of) 970 4800 w (the) 1085 4800 w (overlay) 1239 4800 w (is) 1570 4800 w (flush) 1669 4800 w (with) 1901 4800 w (the) 2111 4800 w (top) 2265 4800 w (edge) 2425 4800 w (of) 2645 4800 w (the) 2760 4800 w (underlying) 2914 4800 w (image.) 3379 4800 w 10 /Times-Bold f (below) 3680 4800 w 10 /Times-Roman f (means) 3962 4800 w (just) 4249 4800 w (out) 4426 4800 w (of) 4585 4800 w (frame) 4699 4800 w (to) 4962 4800 w (the) 970 4920 w (bottom.) 1132 4920 w (These) 1506 4920 w (alignments) 1785 4920 w (are) 2265 4920 w (useful) 2427 4920 w (only) 2712 4920 w (if) 2931 4920 w (you) 3033 4920 w (add) 3224 4920 w (a) 3409 4920 w 10 /Times-Bold f (\255yoff) 3494 4920 w 10 /Times-Roman f (option.) 3734 4920 w (These) 4081 4920 w (two) 4360 4920 w (values) 4551 4920 w (were) 4847 4920 w (added in Netpbm 10.10 \(October 2002\).) 970 5040 w (The default is) 970 5196 w 10 /Times-Bold f (top) 1544 5196 w 10 /Times-Roman f (.) 1683 5196 w 10 /Times-Bold f (\255xoff=) 970 5352 w 10 /Times-Italic f (x) 1226 5352 w 10 /Times-Roman f (This) 1270 5352 w (option) 1494 5352 w (modifies) 1796 5352 w (the) 2192 5352 w (horizontal) 2360 5352 w (positioning) 2811 5352 w (of) 3308 5352 w (the) 3437 5352 w (overlay) 3605 5352 w (image) 3950 5352 w (with) 4240 5352 w (respect) 4464 5352 w (to) 4793 5352 w (the) 4918 5352 w (underlying) 1220 5472 w (image) 1689 5472 w (as) 1969 5472 w (selected) 2088 5472 w (by) 2445 5472 w (the) 2581 5472 w 10 /Times-Bold f (\255align) 2739 5472 w 10 /Times-Roman f (option.) 3020 5472 w 10 /Times-Bold f (pamcomp) 3362 5472 w 10 /Times-Roman f (shifts) 3820 5472 w (the) 4073 5472 w (overlay) 4231 5472 w (image) 4566 5472 w (from) 4846 5472 w (that basic position) 1220 5592 w 10 /Times-Italic f (x) 1973 5592 w 10 /Times-Roman f (pixels to the right.) 2042 5592 w 10 /Times-Italic f (x) 2820 5592 w 10 /Times-Roman f (can be negative to indicate shifting to the left.) 2889 5592 w (The) 970 5748 w (overlay) 1157 5748 w (need) 1488 5748 w (not) 1708 5748 w (fit) 1868 5748 w (entirely) 1989 5748 w (\(or) 2326 5748 w (at) 2474 5748 w (all\)) 2578 5748 w (on) 2743 5748 w (the) 2875 5748 w (underlying) 3029 5748 w (image.) 3494 5748 w 10 /Times-Bold f (pamcomp) 3820 5748 w 10 /Times-Roman f (uses) 4275 5748 w (only) 4480 5748 w (the) 4691 5748 w (parts) 4846 5748 w (that lie over the underlying image.) 970 5868 w (Before Netpbm 10.10 \(October 2002\),) 970 6024 w 10 /Times-Bold f (\255xoff) 2525 6024 w 10 /Times-Roman f (was mutually exclusive with) 2749 6024 w 10 /Times-Bold f (\255align) 3915 6024 w 10 /Times-Roman f (and) 4185 6024 w (always) 4355 6024 w (measured) 4658 6024 w (from the left edge.) 970 6144 w 10 /Times-Bold f (\255yoff=) 970 6300 w 10 /Times-Italic f (y) 1226 6300 w 10 /Times-Roman f (This) 1270 6300 w (option) 1474 6300 w (modifies) 1756 6300 w (the) 2132 6300 w (vertical) 2280 6300 w (positioning) 2605 6300 w (of) 3082 6300 w (the) 3191 6300 w (overlay) 3339 6300 w (image) 3664 6300 w (with) 3934 6300 w (respect) 4139 6300 w (to) 4448 6300 w (the) 4553 6300 w (underly\255) 4702 6300 w (ing) 1220 6420 w (image) 1389 6420 w (as) 1674 6420 w (selected) 1798 6420 w (by) 2160 6420 w (the) 2301 6420 w 10 /Times-Bold f (\255valign) 2464 6420 w 10 /Times-Roman f (option.) 2800 6420 w 10 /Times-Bold f (pamcomp) 3147 6420 w 10 /Times-Roman f (shifts) 3610 6420 w (the) 3868 6420 w (overlay) 4031 6420 w (image) 4371 6420 w (from) 4656 6420 w (that) 4890 6420 w (basic position) 1220 6540 w 10 /Times-Italic f (y) 1798 6540 w 10 /Times-Roman f (pixels downward.) 1867 6540 w 10 /Times-Italic f (y) 2627 6540 w 10 /Times-Roman f (can be negative to indicate shifting upward.) 2696 6540 w (The) 970 6696 w (overlay) 1157 6696 w (need) 1488 6696 w (not) 1708 6696 w (fit) 1868 6696 w (entirely) 1989 6696 w (\(or) 2326 6696 w (at) 2474 6696 w (all\)) 2578 6696 w (on) 2743 6696 w (the) 2875 6696 w (underlying) 3029 6696 w (image.) 3494 6696 w 10 /Times-Bold f (pamcomp) 3820 6696 w 10 /Times-Roman f (uses) 4275 6696 w (only) 4480 6696 w (the) 4691 6696 w (parts) 4846 6696 w (that lie over the underlying image.) 970 6816 w (Before) 970 6972 w (Netpbm) 1276 6972 w (10.10) 1633 6972 w (\(October) 1893 6972 w (2002\),) 2282 6972 w 10 /Times-Bold f (\255xoff) 2575 6972 w 10 /Times-Roman f (was) 2809 6972 w (mutually) 2999 6972 w (exclusive) 3390 6972 w (with) 3803 6972 w 10 /Times-Bold f (\255valign) 4017 6972 w 10 /Times-Roman f (and) 4348 6972 w (always) 4528 6972 w (mea\255) 4841 6972 w (sured from the top edge.) 970 7092 w 10 /Times-Bold f (\255alpha=) 970 7248 w 10 /Times-Italic f (alpha\255pgmfile) 1300 7248 w 10 /Times-Roman f (This) 1861 7248 w (option) 2065 7248 w (names) 2347 7248 w (a) 2628 7248 w (file) 2698 7248 w (that) 2857 7248 w (contains) 3033 7248 w (the) 3392 7248 w (alpha) 3541 7248 w (mask.) 3784 7248 w (If) 4072 7248 w (you) 4165 7248 w (don't) 4342 7248 w (specify) 4580 7248 w (this) 4895 7248 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 (option,) 1220 840 w (there) 1545 840 w (is) 1788 840 w (no) 1899 840 w (alpha) 2043 840 w (mask,) 2303 840 w (which) 2583 840 w (is) 2871 840 w (equivalent) 2982 840 w (to) 3442 840 w (having) 3564 840 w (an) 3880 840 w (alpha) 4018 840 w (mask) 4277 840 w (specify) 4531 840 w (total) 4862 840 w (opaqueness everywhere.) 1220 960 w (You) 970 1116 w (can) 1173 1116 w (specify) 1342 1116 w 10 /Times-Bold f (\255) 1661 1116 w 10 /Times-Roman f (as) 1725 1116 w (the) 1839 1116 w (value) 1992 1116 w (of) 2239 1116 w (this) 2353 1116 w (option) 2529 1116 w (and) 2816 1116 w (the) 2991 1116 w (alpha) 3144 1116 w (mask) 3391 1116 w (will) 3633 1116 w (come) 3820 1116 w (from) 4068 1116 w (Standard) 4294 1116 w (Input.) 4681 1116 w (If) 4974 1116 w (you do this, don't specify Standard Input as the source of any other input image.) 970 1236 w 10 /Times-Bold f (\255invert) 970 1392 w 10 /Times-Roman f (This) 1258 1392 w (option) 1468 1392 w (inverts) 1756 1392 w (the) 2060 1392 w (sense) 2214 1392 w (of) 2462 1392 w (the) 2578 1392 w (values) 2733 1392 w (in) 3021 1392 w (the) 3132 1392 w (alpha) 3287 1392 w (mask,) 3536 1392 w (which) 3805 1392 w (effectively) 4082 1392 w (switches) 4541 1392 w (the) 4918 1392 w (roles of the overlay image and the underlying image in places where the two intersect.) 1220 1512 w 10 /Times-Bold f (\255opacity=) 970 1668 w 10 /Times-Italic f (opacity) 1371 1668 w 10 /Times-Roman f (This) 1665 1668 w (option) 1871 1668 w (tells) 2155 1668 w (how) 2350 1668 w (opaque) 2550 1668 w (the) 2866 1668 w (overlay) 3017 1668 w (image) 3345 1668 w (is) 3618 1668 w (to) 3714 1668 w (be,) 3821 1668 w (i.e.) 3969 1668 w (how) 4120 1668 w (much) 4321 1668 w (of) 4572 1668 w (the) 4684 1668 w (com\255) 4835 1668 w (posite) 1220 1788 w (image) 1485 1788 w (should) 1755 1788 w (be) 2048 1788 w (from) 2168 1788 w (the) 2388 1788 w (overlay) 2536 1788 w (image,) 2861 1788 w (as) 3156 1788 w (opposed) 3265 1788 w (to) 3624 1788 w (the) 3728 1788 w (underlying) 3876 1788 w (image.) 4335 1788 w 10 /Times-Italic f (opacity) 4654 1788 w 10 /Times-Roman f (is) 4973 1788 w (a) 1220 1908 w (floating) 1290 1908 w (point) 1627 1908 w (number,) 1859 1908 w (with) 2215 1908 w (1.0) 2419 1908 w (meaning) 2570 1908 w (the) 2940 1908 w (overlay) 3088 1908 w (image) 3413 1908 w (is) 3683 1908 w (totally) 3776 1908 w (opaque) 4058 1908 w (and) 4373 1908 w (0.0) 4544 1908 w (meaning) 4696 1908 w (it is totally transparent.) 1220 2028 w (The default is 1.0.) 2192 2028 w (If) 970 2184 w (you) 1062 2184 w (specify) 1238 2184 w (an) 1552 2184 w (alpha) 1672 2184 w (mask) 1914 2184 w (\(the) 2151 2184 w 10 /Times-Bold f (\255alpha) 2332 2184 w 10 /Times-Roman f (option\),) 2631 2184 w 10 /Times-Bold f (pamcomp) 2971 2184 w 10 /Times-Roman f (uses) 3419 2184 w (the) 3617 2184 w (product) 3765 2184 w (of) 4096 2184 w (the) 4205 2184 w (opacity) 4353 2184 w (indicated) 4674 2184 w (by) 970 2304 w (the) 1111 2304 w (alpha) 1274 2304 w (mask) 1531 2304 w (\(as) 1783 2304 w (modified) 1940 2304 w (by) 2342 2304 w (the) 2483 2304 w 10 /Times-Bold f (\255invert) 2645 2304 w 10 /Times-Roman f (option,) 2973 2304 w (as) 3294 2304 w (a) 3417 2304 w (fraction,) 3501 2304 w (and) 3876 2304 w (this) 4060 2304 w (opacity) 4245 2304 w (value.) 4579 2304 w (The) 4885 2304 w 10 /Times-Bold f (\255invert) 970 2424 w 10 /Times-Roman f (option does not apply to this opacity value.) 1283 2424 w (As) 970 2580 w (a) 1111 2580 w (simple) 1185 2580 w (opacity) 1482 2580 w (value,) 1806 2580 w (the) 2077 2580 w (value) 2229 2580 w (makes) 2475 2580 w (sense) 2760 2580 w (only) 3006 2580 w (if) 3214 2580 w (it) 3305 2580 w (is) 3391 2580 w (between) 3488 2580 w (0) 3850 2580 w (and) 3930 2580 w (1,) 4104 2580 w (inclusive.) 4209 2580 w (However,) 4650 2580 w 10 /Times-Bold f (pamcomp) 970 2700 w 10 /Times-Roman f (accepts) 1431 2700 w (all) 1763 2700 w (values) 1902 2700 w (and) 2196 2700 w (performs) 2379 2700 w (the) 2778 2700 w (same) 2939 2700 w (arithmetic) 3183 2700 w (computation) 3627 2700 w (using) 4166 2700 w (whatever) 4421 2700 w (value) 4824 2700 w (you) 970 2820 w (provide.) 1153 2820 w (An) 1542 2820 w (opacity) 1698 2820 w (value) 2026 2820 w (less) 2276 2820 w (than) 2460 2820 w (zero) 2666 2820 w (means) 2871 2820 w (the) 3160 2820 w (underlay) 3316 2820 w (image) 3699 2820 w (is) 3977 2820 w (intensified) 4078 2820 w (and) 4534 2820 w (then) 4712 2820 w (the) 4918 2820 w (overlay) 970 2940 w (image) 1300 2940 w (is) 1575 2940 w ("subtracted") 1673 2940 w (from) 2196 2940 w (it.) 2421 2940 w (An) 2558 2940 w (opacity) 2711 2940 w (value) 3036 2940 w (greater) 3283 2940 w (than) 3590 2940 w (unity) 3793 2940 w (means) 4030 2940 w (the) 4315 2940 w (overlay) 4467 2940 w (image) 4796 2940 w (is) 970 3060 w (intensified) 1063 3060 w (and) 1511 3060 w (the) 1681 3060 w (underlaying) 1829 3060 w (image) 2332 3060 w (subtracted) 2602 3060 w (from) 3038 3060 w (it.) 3258 3060 w (In) 3390 3060 w (either) 3499 3060 w (case,) 3752 3060 w 10 /Times-Bold f (pamcomp) 3974 3060 w 10 /Times-Roman f (clips) 4422 3060 w (the) 4637 3060 w (result\255) 4785 3060 w (ing color component intensities so they are nonnegative and don't exceed the output image's maxval.) 970 3180 w (This) 970 3336 w (may) 1175 3336 w (seem) 1374 3336 w (like) 1606 3336 w (a) 1783 3336 w (strange) 1854 3336 w (thing) 2169 3336 w (to) 2402 3336 w (do,) 2507 3336 w (but) 2659 3336 w (it) 2814 3336 w (has) 2897 3336 w (uses.) 3057 3336 w (You) 3306 3336 w (can) 3505 3336 w (use) 3670 3336 w (it) 3830 3336 w (to) 3913 3336 w (brighten) 4018 3336 w (or) 4378 3336 w (darken) 4488 3336 w (or) 4786 3336 w (sat\255) 4896 3336 w (urate or desaturate areas of the underlaying image.) 970 3456 w (See this description of the technique.) 3036 3456 w (This) 970 3612 w (option) 1178 3612 w (was) 1464 3612 w (added) 1649 3612 w (in) 1917 3612 w (Netpbm) 2025 3612 w (10.6) 2378 3612 w (\(July) 2584 3612 w (2002\).) 2815 3612 w (Before) 3129 3612 w (Netpbm) 3431 3612 w (10.15) 3784 3612 w (\(April) 4040 3612 w (2003\),) 4315 3612 w (values) 4604 3612 w (less) 4890 3612 w (than zero or greater than unity were not allowed.) 970 3732 w 10 /Times-Bold f (\255linear) 970 3888 w 10 /Times-Roman f (This) 1253 3888 w (option) 1470 3888 w (indicates) 1765 3888 w (that) 2160 3888 w (the) 2350 3888 w (inputs) 2512 3888 w (are) 2797 3888 w (not) 2958 3888 w (true) 3126 3888 w (Netpbm) 3321 3888 w (images) 3683 3888 w (but) 4006 3888 w (rather) 4174 3888 w (a) 4446 3888 w (non\255gamma\255) 4530 3888 w (adjusted) 1220 4008 w (variation.) 1583 4008 w (This) 2017 4008 w (is) 2224 4008 w (relevant) 2320 4008 w (only) 2670 4008 w (when) 2877 4008 w (you) 3122 4008 w (mix) 3301 4008 w (pixels,) 3486 4008 w (using) 3779 4008 w (the) 4025 4008 w 10 /Times-Bold f (\255opacity) 4176 4008 w 10 /Times-Roman f (option) 4549 4008 w (or) 4834 4008 w (an) 4946 4008 w (alpha mask \(the) 1220 4128 w 10 /Times-Bold f (\255alpha) 1877 4128 w 10 /Times-Roman f (option\).) 2175 4128 w (The) 970 4284 w (alpha) 1151 4284 w (mask) 1393 4284 w (and) 1630 4284 w 10 /Times-Bold f (\255opacity) 1800 4284 w 10 /Times-Roman f (values) 2170 4284 w (indicate) 2451 4284 w (a) 2794 4284 w (fraction) 2865 4284 w (of) 3202 4284 w (the) 3312 4284 w (light) 3461 4284 w (intensity) 3672 4284 w (of) 4044 4284 w (a) 4154 4284 w (pixel.) 4225 4284 w (But) 4502 4284 w (the) 4674 4284 w (PNM) 4823 4284 w (and) 970 4404 w (PNM\255equivalent) 1154 4404 w (PAM) 1859 4404 w (image) 2115 4404 w (formats) 2398 4404 w (represent) 2742 4404 w (intensities) 3146 4404 w (with) 3591 4404 w (gamma\255adjusted) 3808 4404 w (numbers) 4507 4404 w (that) 4890 4404 w (are) 970 4524 w (not) 1124 4524 w (linearly) 1285 4524 w (proportional) 1623 4524 w (to) 2150 4524 w (intensity.) 2261 4524 w (So) 2689 4524 w 10 /Times-Bold f (pamcomp) 2829 4524 w 10 /Times-Roman f (,) 3251 4524 w (by) 3310 4524 w (default,) 3444 4524 w (performs) 3780 4524 w (a) 4174 4524 w (calculation) 4252 4524 w (on) 4724 4524 w (each) 4858 4524 w (sample) 970 4644 w (read) 1288 4644 w (from) 1494 4644 w (its) 1723 4644 w (input) 1853 4644 w (and) 2094 4644 w (each) 2273 4644 w (sample) 2490 4644 w (written) 2808 4644 w (to) 3126 4644 w (its) 3239 4644 w (output) 3369 4644 w (to) 3660 4644 w (convert) 3773 4644 w (between) 4107 4644 w (these) 4474 4644 w (gamma\255) 4713 4644 w (adjusted numbers and internal intensity\255proportional numbers.) 970 4764 w (Sometimes) 970 4920 w (you) 1446 4920 w (are) 1627 4920 w (not) 1779 4920 w (working) 1938 4920 w (with) 2302 4920 w (true) 2511 4920 w (PNM) 2697 4920 w (or) 2945 4920 w (PAM) 3059 4920 w (images,) 3307 4920 w (but) 3646 4920 w (rather) 3805 4920 w (a) 4069 4920 w (variation) 4145 4920 w (in) 4532 4920 w (which) 4642 4920 w (the) 4918 4920 w (sample) 970 5040 w (values) 1283 5040 w (are) 1568 5040 w (in) 1719 5040 w (fact) 1827 5040 w (directly) 2006 5040 w (proportional) 2341 5040 w (to) 2865 5040 w (intensity.) 2973 5040 w (If) 3398 5040 w (so,) 3494 5040 w (use) 3638 5040 w (the) 3801 5040 w 10 /Times-Bold f (\255linear) 3953 5040 w 10 /Times-Roman f (option) 4266 5040 w (to) 4552 5040 w (tell) 4660 5040 w 10 /Times-Bold f (pam\255) 4818 5040 w (comp) 970 5160 w 10 /Times-Roman f (this.) 1228 5160 w 10 /Times-Bold f (pamcomp) 1448 5160 w 10 /Times-Roman f (then will skip the conversions.) 1895 5160 w (The) 970 5316 w (conversion) 1162 5316 w (takes) 1638 5316 w (time.) 1881 5316 w (And) 2147 5316 w (the) 2357 5316 w (difference) 2517 5316 w (between) 2958 5316 w (intensity\255proportional) 3328 5316 w (values) 4238 5316 w (and) 4531 5316 w (gamma\255) 4713 5316 w (adjusted) 970 5436 w (values) 1334 5436 w (may) 1620 5436 w (be) 1823 5436 w (small) 1948 5436 w (enough) 2196 5436 w (that) 2521 5436 w (you) 2702 5436 w (would) 2883 5436 w (barely) 3164 5436 w (see) 3444 5436 w (a) 3602 5436 w (difference) 3677 5436 w (in) 4111 5436 w (the) 4220 5436 w (result) 4372 5436 w (if) 4624 5436 w (you) 4715 5436 w (just) 4895 5436 w (pretended) 970 5556 w (that) 1389 5556 w (the) 1565 5556 w (gamma\255adjusted) 1713 5556 w (values) 2399 5556 w (were) 2680 5556 w (in) 2899 5556 w (fact) 3003 5556 w (intensity\255proportional.) 3178 5556 w (So) 4126 5556 w (just) 4258 5556 w (to) 4429 5556 w (save) 4534 5556 w (time,) 4738 5556 w (at) 4968 5556 w (the) 970 5676 w (expense) 1121 5676 w (of) 1471 5676 w (some) 1583 5676 w (image) 1822 5676 w (quality,) 2094 5676 w (you) 2425 5676 w (can) 2603 5676 w (specify) 2769 5676 w 10 /Times-Bold f (\255linear) 3085 5676 w 10 /Times-Roman f (even) 3396 5676 w (when) 3612 5676 w (you) 3856 5676 w (have) 4034 5676 w (true) 4250 5676 w (PPM) 4433 5676 w (input) 4662 5676 w (and) 4896 5676 w (expect true PPM output.) 970 5796 w (For) 970 5952 w (the) 1138 5952 w (first) 1289 5952 w (13) 1479 5952 w (years) 1608 5952 w (of) 1847 5952 w (Netpbm's) 1959 5952 w (life,) 2382 5952 w (until) 2569 5952 w (Netpbm) 2782 5952 w (10.20) 3133 5952 w (\(January) 3387 5952 w (2004\),) 3759 5952 w 10 /Times-Bold f (pamcomp) 4046 5952 w 10 /Times-Roman f ('s) 4468 5952 w (predecessor) 4570 5952 w 10 /Times-Bold f (pnmcomp) 970 6072 w 10 /Times-Roman f (always) 1427 6072 w (treated) 1733 6072 w (the) 2032 6072 w (PPM) 2182 6072 w (samples) 2411 6072 w (as) 2761 6072 w (intensity\255proportional) 2872 6072 w (even) 3772 6072 w (though) 3988 6072 w (they) 4294 6072 w (were) 4494 6072 w (not,) 4715 6072 w (and) 4896 6072 w (drew) 970 6192 w (few) 1203 6192 w (complaints.) 1386 6192 w (So) 1909 6192 w (using) 2049 6192 w 10 /Times-Bold f (\255linear) 2300 6192 w 10 /Times-Roman f (as) 2617 6192 w (a) 2734 6192 w (lie) 2812 6192 w (is) 2947 6192 w (a) 3049 6192 w (reasonable) 3128 6192 w (thing) 3589 6192 w (to) 3830 6192 w (do) 3943 6192 w (if) 4078 6192 w (speed) 4174 6192 w (is) 4436 6192 w (important) 4538 6192 w (to) 4962 6192 w (you.) 970 6312 w (Another) 970 6468 w (technique) 1360 6468 w (to) 1811 6468 w (consider) 1952 6468 w (is) 2353 6468 w (to) 2483 6468 w (convert) 2625 6468 w (your) 2988 6468 w (PNM) 3235 6468 w (image) 3516 6468 w (to) 3824 6468 w (the) 3966 6468 w (linear) 4152 6468 w (variation) 4443 6468 w (with) 4862 6468 w 10 /Times-Bold f (pnmgamma) 970 6588 w 10 /Times-Roman f (,) 1481 6588 w (run) 1534 6588 w 10 /Times-Bold f (pamcomp) 1695 6588 w 10 /Times-Roman f (on) 2144 6588 w (it) 2271 6588 w (and) 2354 6588 w (other) 2525 6588 w (transformations) 2757 6588 w (that) 3411 6588 w (like) 3588 6588 w (linear) 3765 6588 w (PNM,) 4019 6588 w (and) 4288 6588 w (then) 4459 6588 w (convert) 4658 6588 w (it) 4984 6588 w (back) 970 6708 w (to) 1200 6708 w (true) 1320 6708 w (PNM) 1517 6708 w (with) 1777 6708 w 10 /Times-Bold f (pnmgamma) 1998 6708 w (\255ungamma) 2552 6708 w 10 /Times-Roman f (.) 3013 6708 w 10 /Times-Bold f (pnmgamma) 3106 6708 w 10 /Times-Roman f (is) 3660 6708 w (often) 3770 6708 w (faster) 4018 6708 w (than) 4282 6708 w 10 /Times-Bold f (pamcomp) 4497 6708 w 10 /Times-Roman f (in) 4962 6708 w (doing the conversion.) 970 6828 w cleartomark showpage saveobj restore %%EndPage: 3 3 %%Page: 4 4 /saveobj save def mark 4 pagesetup 10 /Times-Roman f (\255 4 \255) 2797 480 w 10 /Times-Bold f (SEE ALSO) 720 840 w (ppmmix) 720 1032 w 10 /Times-Roman f (and) 1101 1032 w 10 /Times-Bold f (pnmpaste) 1270 1032 w 10 /Times-Roman f (are simpler, less general versions of the same tool.) 1712 1032 w 10 /Times-Bold f (ppmcolormask) 720 1188 w 10 /Times-Roman f (and) 1384 1188 w 10 /Times-Bold f (pbmmask) 1553 1188 w 10 /Times-Roman f (can help with generating an alpha mask.) 2001 1188 w 10 /Times-Bold f (pnmcomp) 720 1344 w 10 /Times-Roman f (is an older program that runs faster, but has less function.) 1173 1344 w 10 /Times-Bold f (pnm) 720 1500 w (HISTORY) 720 1740 w (pamcomp) 720 1932 w 10 /Times-Roman f (was) 1173 1932 w (new) 1359 1932 w (in) 1556 1932 w (Netpbm) 1665 1932 w (10.21) 2018 1932 w (\(March) 2274 1932 w (2004\).) 2598 1932 w (Its) 2912 1932 w (predecessor,) 3043 1932 w 10 /Times-Bold f (pnmcomp) 3569 1932 w 10 /Times-Roman f (,) 3997 1932 w (was) 4053 1932 w (one) 4239 1932 w (of) 4414 1932 w (the) 4528 1932 w (first) 4681 1932 w (pro\255) 4874 1932 w (grams added to Netpbm when the project went global in 1993.) 720 2052 w 10 /Times-Bold f (AUTHOR) 720 2292 w 10 /Times-Roman f (Copyright \(C\) 1992 by David Koblas \(koblas@mips.com\).) 720 2448 w 10 /S1 f (________________________________________________________________________) 720 2568 w 10 /Times-Bold f (Table Of Contents) 720 2808 w 10 /LucidaSansUnicode22 f (\031) 720 3000 w 10 /Times-Roman f (SYNOPSIS) 970 3000 w 10 /LucidaSansUnicode22 f (\031) 720 3156 w 10 /Times-Roman f (DESCRIPTION) 970 3156 w 10 /LucidaSansUnicode22 f (\031) 720 3312 w 10 /Times-Roman f (OPTIONS) 970 3312 w 10 /LucidaSansUnicode22 f (\031) 720 3468 w 10 /Times-Roman f (SEE ALSO) 970 3468 w 10 /LucidaSansUnicode22 f (\031) 720 3624 w 10 /Times-Roman f (HISTORY) 970 3624 w 10 /LucidaSansUnicode22 f (\031) 720 3780 w 10 /Times-Roman f (AUTHOR) 970 3780 w cleartomark showpage saveobj restore %%EndPage: 4 4 %%Trailer done %%DocumentFonts: Times-Roman LucidaSansUnicode22 Times-Italic Times-Bold S1 S %%Pages: 4