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comparison Meerwald-dir/gen_cox_sig.1 @ 24:9f20bce6184e v0.7
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| author | Peter Meerwald-Stadler <pmeerw@pmeerw.net> |
|---|---|
| date | Fri, 20 Dec 2024 13:08:59 +0100 |
| parents | Meerwald/gen_cox_sig.1@be303a3f5ea8 |
| children |
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| 23:71dd4b96221b | 24:9f20bce6184e |
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| 1 .\" | |
| 2 .\" gen_cox_sig.1 - the *roff document processor man page source | |
| 3 .\" | |
| 4 .TH gen_cox_sig 1 "98/06/30" "Watermarking, Version 1.0" | |
| 5 .SH NAME | |
| 6 .B gen_cox_sig | |
| 7 \- a program to generate a signature for | |
| 8 the | |
| 9 .B wm_cox_e | |
| 10 watermarking program | |
| 11 .SH SYNOPSIS | |
| 12 .B gen_cox_sig | |
| 13 [ | |
| 14 .BI \-a \ number | |
| 15 ] | |
| 16 [ | |
| 17 .BI \-d \ number | |
| 18 ] | |
| 19 [ | |
| 20 .B \-h | |
| 21 ] | |
| 22 [ | |
| 23 .BI \-m \ number | |
| 24 ] | |
| 25 [ | |
| 26 .BI \-n \ number | |
| 27 ] | |
| 28 [ | |
| 29 .BI \-o \ file | |
| 30 ] | |
| 31 [ | |
| 32 .BI \-q \ number | |
| 33 ] | |
| 34 [ | |
| 35 .BI \-s \ number | |
| 36 ] | |
| 37 .SH DESCRIPTION | |
| 38 .B gen_cox_sig | |
| 39 is a program to generate a signature to be | |
| 40 embedded with the | |
| 41 .B wm_cox_e | |
| 42 watermarking program and extracted with the | |
| 43 .B wm_cox_d | |
| 44 program. The | |
| 45 .B cmp_cox_sig | |
| 46 program is used to compare and test an | |
| 47 extracted signature with the original signature. | |
| 48 .PP | |
| 49 Please refer to Ingemar J. Cox's paper "Secure Spread Spectrum | |
| 50 Watermarking for Multimedia", 1995, to get an idea about the algorithm. | |
| 51 .PP | |
| 52 .SH OPTIONS | |
| 53 .TP | |
| 54 .BI \-a \ number | |
| 55 Alpha factor that determines embedding strength of the signature. Default | |
| 56 value 0.3. | |
| 57 .TP | |
| 58 .BI \-d \ number | |
| 59 Deviation for the normal distributed signature values, default 1.0. | |
| 60 .TP | |
| 61 .B \-h | |
| 62 Print a help message. | |
| 63 .TP | |
| 64 .BI \-m \ number | |
| 65 Mean of the normal distributed signature values, default 0.0. | |
| 66 .TP | |
| 67 .BI \-n \ number | |
| 68 Length of the watermark. Default value 100. | |
| 69 .TP | |
| 70 .BI \-o \ file | |
| 71 Output signature to the specified | |
| 72 .I file | |
| 73 instead of standard output. | |
| 74 .TP | |
| 75 .BI \-q \ number | |
| 76 Quantization/quality factor. Default value 3. | |
| 77 .TP | |
| 78 .BI \-s \ number | |
| 79 Specify a seed value to initialize the pseudo-random number | |
| 80 generator; if not specified, time and pid (process id) are used | |
| 81 to initialize the pseudo-random number generator. | |
| 82 .PP | |
| 83 .SH OUTPUT | |
| 84 The output file has the following format: | |
| 85 .TP | |
| 86 .B CXSG | |
| 87 Magic to identify file type. | |
| 88 .TP | |
| 89 .I number | |
| 90 The length of the signature in bits. | |
| 91 .TP | |
| 92 .I number | |
| 93 The alpha factor (embedding strength). | |
| 94 .TP | |
| 95 .I number | |
| 96 The quantization/quality factor. | |
| 97 .TP | |
| 98 .I numbers | |
| 99 The actual normal distributed signature values, one per line. | |
| 100 .PP | |
| 101 .SH AUTHOR | |
| 102 Peter Meerwald. Email bug reports to pmeerw@cosy.sbg.ac.at. | |
| 103 .SH AVAILABILITY | |
| 104 The most recent released version of | |
| 105 .B gen_cox_sig | |
| 106 is always available | |
| 107 at http://www.cosy.sbg.ac.at/~pmeerw/Watermarking or via anonymous ftp from ftp.cosy.sbg.ac.at in the | |
| 108 directory /pub/people/pmeerw/Watermarking. | |
| 109 .SH "SEE ALSO" | |
| 110 .BR wm_cox_e | |
| 111 (1), | |
| 112 .BR wm_cox_d | |
| 113 (1), | |
| 114 .BR cmp_cox_sig | |
| 115 (1) |