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pnmalias(1) | General Commands Manual | 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 colorfset 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:
-bonly, -fonly
- 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.)
Apply anti-aliasing only to background (-bonly),
or foreground (-fonly) pixels.
-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.30 April 1992 |