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%%Version: 0.1
%%DocumentFonts: (atend)
%%Pages: (atend)
%%EndComments
%
% Version 3.3.2 prologue for troff files.
%

/#copies 1 store
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/linewidth .3 def
/magnification 1 def
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/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 {
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	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
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	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
	/.notdef
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	/.notdef
	/space
	/exclam
	/quotedbl
	/numbersign
	/dollar
	/percent
	/ampersand
	/quoteright
	/parenleft
	/parenright
	/asterisk
	/plus
	/comma
	/minus
	/period
	/slash
	/zero
	/one
	/two
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	/six
	/seven
	/eight
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	/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
(Pgmkernel) 2250 1230 w
(User) 2840 1230 w
(Manual) 3109 1230 w
10 /Times-Bold f
(pgmkernel) 720 1920 w
10 /Times-Roman f
(Updated: 10 December 1992) 720 2076 w
(Table Contents) 720 2196 w
10 /Times-Bold f
(NAME) 720 2436 w
10 /Times-Roman f
(pgmkernel \255 generate a convolution kernel) 720 2592 w
10 /Times-Bold f
(SYNOPSIS) 720 2832 w
(pgmkernel) 720 2988 w
10 /Times-Roman f
([) 1206 2988 w
10 /Times-Bold f
(\255weight) 1239 2988 w
10 /Times-Italic f
(w) 1580 2988 w
10 /Times-Roman f
(]) 1647 2988 w
10 /Times-Italic f
(width) 1705 2988 w
10 /Times-Roman f
([) 1953 2988 w
10 /Times-Italic f
(height) 1986 2988 w
10 /Times-Roman f
(]) 2261 2988 w
10 /Times-Bold f
(DESCRIPTION) 720 3228 w
10 /Times-Roman f
(This program is part of Netpbm.) 720 3420 w
10 /Times-Bold f
(pgmkernel) 720 3576 w
10 /Times-Roman f
(generates) 1209 3576 w
(a) 1613 3576 w
(convolution) 1685 3576 w
(kernel) 2191 3576 w
(that) 2469 3576 w
(you) 2648 3576 w
(can) 2827 3576 w
(use) 2994 3576 w
(with) 3156 3576 w
10 /Times-Bold f
(pnmconvol) 3363 3576 w
10 /Times-Roman f
(.) 3836 3576 w
(The) 3915 3576 w
(kernel) 4099 3576 w
(is) 4377 3576 w
(one) 4473 3576 w
(where) 4646 3576 w
(the) 4918 3576 w
(weight of each location is inversely proportional to its distance from the center of the kernel.) 720 3696 w
10 /Times-Bold f
(pgmkernel) 720 3852 w
10 /Times-Roman f
(generates a PGM image of size) 1206 3852 w
10 /Times-Italic f
(width) 2475 3852 w
10 /Times-Roman f
(by) 2723 3852 w
10 /Times-Italic f
(height) 2848 3852 w
10 /Times-Roman f
(\(or) 3123 3852 w
10 /Times-Italic f
(width) 3264 3852 w
10 /Times-Roman f
(by) 3512 3852 w
10 /Times-Italic f
(width) 3637 3852 w
10 /Times-Roman f
(if you don't specify) 3885 3852 w
10 /Times-Italic f
(height) 4695 3852 w
10 /Times-Roman f
(\).) 4945 3852 w
10 /Times-Bold f
(pgmkernel) 720 4008 w
10 /Times-Roman f
(computes) 1208 4008 w
(the) 1619 4008 w
(convolution) 1769 4008 w
(function) 2275 4008 w
(K) 2636 4008 w
(as) 2736 4008 w
(follows.) 2847 4008 w
(K\(i,j\)) 3225 4008 w
(=) 3472 4008 w
(1) 3556 4008 w
(/) 3634 4008 w
(\() 3690 4008 w
(1) 3751 4008 w
(+) 3829 4008 w
(w) 3913 4008 w
(*) 4013 4008 w
(sqrt\(i\2232) 4091 4008 w
(+) 4413 4008 w
(j\2232\)\)) 4497 4008 w
(where) 4702 4008 w
10 /Times-Italic f
(w) 4973 4008 w
10 /Times-Roman f
(is) 720 4128 w
(a) 827 4128 w
(coefficient) 911 4128 w
(specified) 1377 4128 w
(via) 1777 4128 w
(the) 1939 4128 w
10 /Times-Bold f
(\255weight) 2101 4128 w
10 /Times-Roman f
(option.) 2457 4128 w
10 /Times-Italic f
(i) 2803 4128 w
10 /Times-Roman f
(and) 2871 4128 w
10 /Times-Italic f
(j) 3055 4128 w
10 /Times-Roman f
(are) 3123 4128 w
(measured) 3283 4128 w
(in) 3704 4128 w
(pixels.) 3821 4128 w
(K) 4149 4128 w
(is) 4260 4128 w
(zero) 4366 4128 w
(everywhere) 4576 4128 w
(beyond the specified kernel width and height.) 720 4248 w
10 /Times-Bold f
(pgmkernel) 720 4404 w
10 /Times-Roman f
(generates the output PGM file in the Plain \(text\) variation of PGM.) 1206 4404 w
10 /Times-Bold f
(OPTIONS) 720 4644 w
10 /Times-Roman f
(The optional) 720 4800 w
10 /Times-Bold f
(\255weight) 1253 4800 w
10 /Times-Roman f
(value should be a real number greater than \2551.) 1594 4800 w
(The default value is 6.0.) 3475 4800 w
10 /Times-Bold f
(LIMITATIONS) 720 5040 w
10 /Times-Roman f
(The) 720 5232 w
(computation) 905 5232 w
(time) 1435 5232 w
(is) 1643 5232 w
(proportional) 1740 5232 w
(to) 2264 5232 w
10 /Times-Italic f
(width) 2372 5232 w
10 /Times-Roman f
(*) 2595 5232 w
10 /Times-Italic f
(height) 2645 5232 w
10 /Times-Roman f
(.) 2895 5232 w
(This) 2975 5232 w
(increases) 3184 5232 w
(rapidly) 3580 5232 w
(with) 3894 5232 w
(the) 4103 5232 w
(increase) 4256 5232 w
(of) 4613 5232 w
(the) 4727 5232 w
(ker\255) 4880 5232 w
(nel size.) 720 5352 w
(A better approach could be using a FFT in these cases.) 1097 5352 w
10 /Times-Bold f
(SEE ALSO) 720 5592 w
10 /Times-Roman f
(pnmconvol, pnmsmooth pamgauss pgm) 720 5748 w
10 /Times-Bold f
(AUTHOR) 720 5988 w
10 /Times-Roman f
(Alberto Accomazzi \(alberto@cfa.harvard.edu\).) 720 6144 w
10 /S1 f
(________________________________________________________________________) 720 6264 w
10 /Times-Bold f
(Table Of Contents) 720 6504 w
10 /LucidaSansUnicode22 f
(\031) 720 6696 w
10 /Times-Roman f
(NAME) 970 6696 w
10 /LucidaSansUnicode22 f
(\031) 720 6852 w
10 /Times-Roman f
(SYNOPSIS) 970 6852 w
10 /LucidaSansUnicode22 f
(\031) 720 7008 w
10 /Times-Roman f
(DESCRIPTION) 970 7008 w
10 /LucidaSansUnicode22 f
(\031) 720 7164 w
10 /Times-Roman f
(OPTIONS) 970 7164 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 /LucidaSansUnicode22 f
(\031) 720 840 w
10 /Times-Roman f
(BUGS) 970 840 w
10 /LucidaSansUnicode22 f
(\031) 720 996 w
10 /Times-Roman f
(SEE ALSO) 970 996 w
10 /LucidaSansUnicode22 f
(\031) 720 1152 w
10 /Times-Roman f
(AUTHOR) 970 1152 w
cleartomark
showpage
saveobj restore
%%EndPage: 2 2
%%Trailer
done
%%DocumentFonts: Times-Roman LucidaSansUnicode22 Times-Italic Times-Bold S1
%%Pages: 2