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Almathera Ten Pack 3: CDPD 3
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Almathera Ten on Ten - Disc 3: CDPD3.iso
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fbm10man.zoo
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fbsharp.man
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1990-12-18
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FBSHARP(1) 25-Jun-90 FBSHARP(1)
3
1mNAME
0mfbsharp \- edge enhance a grayscale or color image
1mSYNOPSIS
0mfbsharp [ -<type> ] beta < image > image
1mDESCRIPTION
0mUses a digital Laplacian filter to enhance the edges.
Typical values of beta run from 1 to 20. The default is 2.
This command works for color images, but values of
sharpening higher than 3 or 4 tend to create lots of noisy
artifiacts in the image.
The 3mfbhalf 0mcommand also calls the sharpening code implicitly
if the 3m-s 0moptional is passed to 3mfbhalf.
0m1mOPTIONS
0m<1mbeta0m> specifies the amount of sharpening. Typical values
run from 1 to 10, higher values can cause snow.
-1mB 0m3mface 0mformat, as used by Bennet Yee's 3mface 0mprogram at CMU.
-1mF 0m3mFBM, 0mformat (by default, the default). You are
guaranteed not to lose information by specifying FBM as the
default.
-1mG 0m3mGIF, 0mCompuserve GIF format.
-1mI 0m3mIFF 0mformat, interleaved bitmaps (ILBM), used by Amigas.
-1mP 0m3mPBM, 0mJef Poskanzer's bitmap format.
-1mS 0m3msun, 0mSun rasterfiles (not run length encoded).
1mEXAMPLE
0mSince the -s option of fbahlf(1) exists, you will
probably only run fbsharp on color images, which tolerate
less sharpening. Here we sharpen an FBM format color image
with beta=3 and quantize it for display on a Sun:
% fbsharp 3.0 < foo.fbm | fbquant -S > foo.clr
1mSEE ALSO
0mfbm(1) for general discussion, pbm(1) for PBM routines.
1mBUGS
0mNone known.
1mHISTORY
0mCopyright (C) 1989,1990 by Michael Mauldin. Permission is
granted to use this file in whole or in part for any
purpose, educational, recreational or commercial, provided
that this copyright notice is retained unchanged. This
-1-
FBSHARP(1) 25-Jun-90 FBSHARP(1)
software is available to all free of charge by anonymous FTP
and in the UUNET archives.
25-Jun-90 Michael Mauldin at Carnegie Mellon University
Release 1.0 mlmcs.cmu.edu
07-Mar-89 Michael L. Mauldin at Carnegie Mellon University
Beta release (version 0.9) mlmcs.cmu.edu
-2-