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1 perry 1 PNMTORLE
2 !!!PNMTORLE
3 NAME
4 SYNOPSIS
5 DESCRIPTION
6 OPTIONS
7 EXAMPLES
8 SEE ALSO
9 AUTHOR
10 ----
11 !!NAME
12
13
14 pnmtorle - convert a Netpbm image file into an RLE image file.
15 !!SYNOPSIS
16
17
18 __pnmtorle__ [[ __-h__ ] [[ __-v__ ] [[ __-a__ ] [[
19 __-o__ ''outfile'' ] [[ ''pnmfile'' ]
20 !!DESCRIPTION
21
22
23 This program converts Netpbm image files into Utah
4 perry 24 RLE(5) image files. You can include an alpha mask. If
1 perry 25 the input is a multiple image file, the output consists of
26 several concatenated RLE images.
27
28
29 The RLE file will contain either a three channel color image
30 (24 bits) or a single channel grayscale image (8 bits)
31 depending upon the pnm file depth. If a converted ppm is
32 displayed on an 8 bit display, the image must be dithered.
33 In order to produce a better looking image (on 8 bit
34 displays), it is recommended that the image be quantizing
35 (to 8 bit mapped color) prior to its display. This may be
36 done by piping the output of this program into the Utah
37 mcut(1) or rlequant(1) utilities. An example
38 of this is shown later.
39 !!OPTIONS
40
41
42 __-v__
43
44
45 This option will cause pnmtorle to operate in verbose mode.
46 The header information is written to
47
48
49 __-h__
50
51
52 This option allows the header of the Netpbm image to be
53 dumped to
54
55
56 __-a__
57
58
59 This option causes pnmtorle to include an alpha channel in
60 the output image. The alpha channel is based on the image:
61 Wherever a pixel is black, the corresponding alpha value is
62 transparent. Everywhere else, the alpha value is fully
63 opaque.
64
65
66 __-o__ ''outfile''
67
68
69 If specified, the output will be written to this file. If
70 ''outfile'' is
71 ''
72
73
74 ''pnmfile''
75
76
77 The name of the Netpbm image data file to be converted. If
78 not specified, standard input is assumed.
79 !!EXAMPLES
80
81
82 pnmtorle -v file.ppm -o file.rle
83
84
85 While running in verbose mode, convert file.ppm to RLE
86 format and store resulting data in file.rle.
87
88
89 pnmtorle -h file.pgm
90
91
92 Dump the header information of the Netpbm file called
93 file.pgm.
94 !!SEE ALSO
95
96
97 rletopnm(1), urt(1),
4 perry 98 RLE(5).
1 perry 99 !!AUTHOR
100
101
102 Wes Barris
103 Army High Performance Computing Research Center (AHPCRC)
104 Minnesota Supercomputer Center, Inc.
105 ----
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