Mercurial > hg > wm
comparison Meerwald/gen_kutter_sig.1 @ 0:be303a3f5ea8
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| author | Peter Meerwald <pmeerw@cosy.sbg.ac.at> |
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| date | Sun, 12 Aug 2007 13:14:34 +0200 |
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| -1:000000000000 | 0:be303a3f5ea8 |
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| 1 .\" | |
| 2 .\" gen_kutter_sig.1 - the *roff document processor man page source | |
| 3 .\" | |
| 4 .TH gen_kutter_sig 1 "98/06/30" "Watermarking, Version 1.0" | |
| 5 .SH NAME | |
| 6 .B gen_kutter_sig | |
| 7 \- a program to generate a signature for | |
| 8 the | |
| 9 .B wm_kutter_e | |
| 10 watermarking program | |
| 11 .SH SYNOPSIS | |
| 12 .B gen_kutter_sig | |
| 13 [ | |
| 14 .B \-h | |
| 15 ] | |
| 16 [ | |
| 17 .BI \-n \ number | |
| 18 ] | |
| 19 [ | |
| 20 .BI \-o \ file | |
| 21 ] | |
| 22 [ | |
| 23 .BI \-p \ number | |
| 24 ] | |
| 25 [ | |
| 26 .BI \-q \ number | |
| 27 ] | |
| 28 [ | |
| 29 .BI \-r \ number | |
| 30 ] | |
| 31 .br | |
| 32 [ | |
| 33 .BI \-s \ number | |
| 34 ] | |
| 35 [ | |
| 36 .I file | |
| 37 ] | |
| 38 .SH DESCRIPTION | |
| 39 .B gen_kutter_sig | |
| 40 is a program to generate a signature to be | |
| 41 embedded with the | |
| 42 .B wm_kutter_e | |
| 43 watermarking program and extracted with the | |
| 44 .B wm_kutter_d | |
| 45 program. The | |
| 46 .B cmp_kutter_sig | |
| 47 program is used to compare and test an | |
| 48 extracted signature with the original signature. | |
| 49 .PP | |
| 50 Please refer to M. Kutter's paper "Digital Signature of Color Images | |
| 51 using Amplitude Modulation", 1997, to get an idea about the algorithm. | |
| 52 .PP | |
| 53 .SH OPTIONS | |
| 54 .TP | |
| 55 .B \-h | |
| 56 Print a help message. | |
| 57 .TP | |
| 58 .BI \-n \ number | |
| 59 Limit the signature length to | |
| 60 .I number | |
| 61 bits (0 < | |
| 62 .I number | |
| 63 <= 1024) unless reading from standard input. When reading from | |
| 64 standard input, the signature is terminated by the first | |
| 65 carriage return character. | |
| 66 .TP | |
| 67 .BI \-o \ file | |
| 68 Output signature to the specified | |
| 69 .TP | |
| 70 .BI \-p \ number | |
| 71 Density parameter in the range 0.0 < | |
| 72 .I number | |
| 73 <= 1.0. Default value 0.01. | |
| 74 .TP | |
| 75 .BI \-q \ number | |
| 76 Signature strength. Default value 0.1. | |
| 77 .TP | |
| 78 .BI \-r \ number | |
| 79 Signature bit repetition factor. Specifies how often a single | |
| 80 signature bit is embedded. Default value 8. | |
| 81 .I file | |
| 82 instead of standard output. | |
| 83 .TP | |
| 84 .BI \-s \ number | |
| 85 Specify a seed value to initialize the pseudo-random number | |
| 86 generator; if not specified, time and pid (process id) are used | |
| 87 to initialize the pseudo-random number generator. | |
| 88 .TP | |
| 89 .I file | |
| 90 Input file to read raw signature data from. Default: standard | |
| 91 input. | |
| 92 .PP | |
| 93 .SH OUTPUT | |
| 94 The output file has the following format: | |
| 95 .TP | |
| 96 .B KTSG | |
| 97 Magic to identify file type. | |
| 98 .TP | |
| 99 .I number | |
| 100 The length of the signature in bits. | |
| 101 .TP | |
| 102 .I number | |
| 103 The density parameter. | |
| 104 .TP | |
| 105 .I number | |
| 106 The signature strength. | |
| 107 .TP | |
| 108 .I number | |
| 109 The bit repetition parameter. | |
| 110 .TP | |
| 111 .I number | |
| 112 The seed value for the pseudo-random number generator. | |
| 113 .TP | |
| 114 .I string | |
| 115 The actual signature bytes. | |
| 116 .PP | |
| 117 .SH AUTHOR | |
| 118 Peter Meerwald. Email bug reports to pmeerw@cosy.sbg.ac.at. | |
| 119 .SH AVAILABILITY | |
| 120 The most recent released version of | |
| 121 .B gen_kutter_sig | |
| 122 is always available | |
| 123 at http://www.cosy.sbg.ac.at/~pmeerw/Watermarking or via anonymous ftp from ftp.cosy.sbg.ac.at in the | |
| 124 directory /pub/people/pmeerw/Watermarking. | |
| 125 .SH "SEE ALSO" | |
| 126 .BR wm_kutter_e | |
| 127 (1), | |
| 128 .BR wm_kutter_d | |
| 129 (1), | |
| 130 .BR cmp_kutter_sig | |
| 131 (1) |