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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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fbm
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fbm10man.zoo
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fbedge.man
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1990-12-18
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FBEDGE(1) 25-Jun-90 FBEDGE(1)
3
1mNAME
0mfbedge \- compute the derivative of an image (edge
detection)
1mSYNOPSIS
0mfbedge [ -t<threshhold> ] [ -<type> ] < bitmap > bitmap
1mDESCRIPTION
0mComputes a halftoned image composed of edges in the
original. Edge detection is done by digital Laplacian.
-1mt0m<1mnum0m> 3mthreshhold 0margument, specifies a threshhold for
detecting edges. Pixels with first derivatives greater than
the threshhold will be black, and others will be white.
-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
0mTo produce an image of regions in a grayscale image
where the first derivative is greater than 10, and output
the result as a Sun rasterfile:
% fbedge -t10 -S < foo.gray > foo.1bit
1mSEE ALSO
0mfbm(1) for general discussion, pbm(1) for PBM routines.
1mBUGS
0mNone known.
1mHISTORY
0mCopyright (C) 1989,1990 by Gary Sherwin & 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 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
-1-
FBEDGE(1) 25-Jun-90 FBEDGE(1)
Beta release (version 0.9) mlmcs.cmu.edu
-2-