blob: 5429524430073ee60471422b257ab73e2baff1d3 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
\
.\" This man page was generated by the Netpbm tool 'makeman' from HTML source.
.\" Do not hand-hack it! If you have bug fixes or improvements, please find
.\" the corresponding HTML page on the Netpbm website, generate a patch
.\" against that, and send it to the Netpbm maintainer.
.TH "Ppmrelief User Manual" 0 "02 August 2014" "netpbm documentation"
.SH NAME
ppmrelief - compute a relief of a PPM image
.UN synopsis
.SH SYNOPSIS
\fBppmrelief\fP
[\fIppmfile\fP]
.UN description
.SH DESCRIPTION
.PP
This program is part of
.BR "Netpbm" (1)\c
\&.
.PP
\fBppmrelief\fP reads a PPM image as input, and writes a relief of
that image as a PPM image as output.
.PP
The relief process is described in "Beyond Photography" by
Holzmann, equation 3.19. It's a sort of edge-detection and is essentially
a convolution with this matrix:
.nf
| 1 0 0 |
| 0 0 0 |
| 0 0 -1 |
.fi
.UN options
.SH OPTIONS
.PP
There are no command line options defined specifically
for \fBppmrelief\fP, but it recognizes the options common to all
programs based on libnetpbm (See
.UR index.html#commonoptions
Common Options
.UE
\&.)
.UN seealso
.SH SEE ALSO
.BR "pamshadedrelief" (1)\c
\&,
.BR "pgmbentley" (1)\c
\&,
.BR "pgmoil" (1)\c
\&,
.BR "ppm" (1)\c
\&
.UN author
.SH AUTHOR
Copyright (C) 1990 by Wilson Bent (\fIwhb@hoh-2.att.com\fP)
.SH DOCUMENT SOURCE
This manual page was generated by the Netpbm tool 'makeman' from HTML
source. The master documentation is at
.IP
.B http://netpbm.sourceforge.net/doc/ppmrelief.html
.PP
|
