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pnmalias(1) AMIGA (30 April 1992) pnmalias(1)
NAME
pnmalias - antialias a portable anyumap.
SYNOPSIS
pnmalias [-bgcolor color] [-fgcolor color] [-bonly] [-fonly]
[-balias] [-falias] [-weight w] [pnmfile]
DESCRIPTION
Reads a portable anymap as input, and applies anti-aliasing
to background and foreground pixels. If the input file is a
portable bitmap, the output anti-aliased image is promoted
to a graymap, and a message is printed informing the user of
the change in format.
OPTIONS
-bgcolor colorb, -fgcolor colorf
set the background color to colorb, and the foreground
to color to colorf. Pixels with these values will be
anti-aliased. by default, the background color is taken
to be black, and foreground color is assumed to be
white. The colors can be specified in five ways:
o A name, assuming that a pointer to an X11-style
color names file was compiled in.
o An X11-style hexadecimal specifier: rgb:r/g/b,
where r g and b are each 1- to 4-digit hexadecimal
numbers.
o An X11-style decimal specifier: rgbi:r/g/b, where
r g and b are floating point numbers between 0 and
1.
o For backwards compatibility, an old-X11-style
hexadecimal number: #rgb, #rrggbb, #rrrgggbbb, or
#rrrrggggbbbb.
o For backwards compatibility, a triplet of numbers
separated by commas: r,g,b, where r g and b are
floating point numbers between 0 and 1. (This
style was added before MIT came up with the
similar rgbi style.)
Note that even when dealing with graymaps, background
and foreground colors need to be specified in the
fashion described above. In this case, background and
foreground pixel values are taken to be the value of
the red component for the given color.
-bonly, -fonly
Apply anti-aliasing only to background (-bonly), or
foreground (-fonly) pixels.
Page 1 (printed 3/1/94)
pnmalias(1) AMIGA (30 April 1992) pnmalias(1)
-balias, -falias
Apply anti-aliasing to all pixels surrounding
background (-balias), or foreground (-falias) pixels.
By default, anti-aliasing takes place only among
neighboring background and foreground pixels.
-weight w
Use w as the central weight for the aliasing filter. W
must be a real number in the range 0 < w < 1. The
lower the value of w is, the "blurrier" the output
image is. The default is w = 1/3.
SEE ALSO
pbmtext(1), pnmsmooth(1), pnm(5)
AUTHOR
Copyright (C) 1992 by Alberto Accomazzi, Smithsonian
Astrophysical Observatory.
Page 2 (printed 3/1/94)