annotate Meerwald/wm_cox_e.1 @ 22:d8551fb39a5e default tip

Added tag v0.6 for changeset 1c4ccd635a68
author Peter Meerwald-Stadler <pmeerw@pmeerw.net>
date Sat, 28 Jan 2023 23:57:51 +0100
parents be303a3f5ea8
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
1 .\"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
2 .\" wm_cox_e.1 - the *roff document processor man page source
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
3 .\"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
4 .TH wm_cox_e 1 "98/07/01" "Watermarking, Version 1.0"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
5 .SH NAME
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
6 .B wm_cox_e
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
7 \- a program to embed a signature in the DCT coefficients of an image
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
8 .SH SYNOPSIS
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
9 .B wm_cox_e
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
10 [
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
11 .BI \-a \ number
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
12 ]
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
13 [
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
14 .B \-h
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
15 ]
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
16 [
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
17 .BI \-o \ ofile
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
18 ]
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
19 [
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
20 .BI \-q \ number
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
21 ]
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
22 .BI \-s \ sfile
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
23 .I file
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
24 .SH DESCRIPTION
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
25 .B wm_cox_e
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
26 is a program to embed a signature (watermark) from
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
27 .I sfile
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
28 into the DCT coefficients of an image
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
29 .I file
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
30 and output a signed (watermarked) image
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
31 .I ofile.
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
32 Both, input and output image,
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
33 are in PGM (portable graymap) format.
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
34 .PP
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
35 If
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
36 .I file
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
37 or
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
38 .I ofile
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
39 is not specified, then standard input or standard output is
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
40 used. The signature
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
41 .I sfile
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
42 is a mandatory parameter however.
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
43 .PP
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
44 .B gen_cox_sig
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
45 is used to generate a signature file,
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
46 .B wm_cox_d
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
47 extracts a signature from a watermarked image and
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
48 .B cmp_cox_sig
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
49 allows to compare and test an extracted watermark against the original
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
50 signature.
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
51 .PP
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
52 Please refer to Ingemar J. Cox's paper "Secure Spread Spectrum
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
53 Watermarking for Multimedia", 1995, to get an idea about the algorithm.
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
54 .PP
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
55 .SH OPTIONS
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
56 .TP
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
57 .BI \-a \ number
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
58 Alpha factor that determines embedding strength of the signature.
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
59 Allows to override the setting in the signature file.
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
60 .TP
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
61 .B \-h
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
62 Print a help message.
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
63 .TP
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
64 .BI \-o \ ofile
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
65 Output watermarked image to the specified
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
66 .I file
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
67 instead of standard output.
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
68 .TP
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
69 .BI \-q \ number
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
70 Set quantization/quality factor. Overrides the setting in the signature
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
71 file.
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
72 .TP
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
73 .BI \-s \ sfile
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
74 The signature file to embed into the input image. See
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
75 .B gen_cox_sig
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
76 (1) for a description of the file format. Mandatory parameter.
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
77 .IR file
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
78 Input image in PGM format to sign (watermark). Default: standard input.
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
79 .TP
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
80 .I file
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
81 The input image in PGM format.
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
82 .PP
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
83 .SH OUTPUT
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
84 The signed (watermarked) image in PGM format is written to standard output
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
85 or, optionally, to
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
86 .I ofile.
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
87 The embedding process may take some time on large images since the DCT
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
88 is performed on the whole image in one step (not block-wise).
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
89 .PP
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
90 The
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
91 .I n
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
92 largest coefficients are pulsed to embed the
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
93 .I n
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
94 bit watermark.
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
95 .PP
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
96 .SH AUTHOR
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
97 Peter Meerwald. Email bug reports to pmeerw@cosy.sbg.ac.at.
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
98 .SH AVAILABILITY
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
99 The most recent released version of
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
100 .B wm_cox_e
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
101 is always available
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
102 at http://www.cosy.sbg.ac.at/~pmeerw/Watermarking or via anonymous ftp from ftp.cosy.sbg.ac.at in the
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
103 directory /pub/people/pmeerw/Watermarking.
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
104 .SH "SEE ALSO"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
105 .BR gen_cox_sig
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
106 (1),
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
107 .BR wm_cox_d
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
108 (1),
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
109 .BR cmp_cox_sig
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
110 (1)

Repositories maintained by Peter Meerwald, pmeerw@pmeerw.net.