Mercurial > hg > wm

comparison Meerwald-dir/gen_kim_sig.c @ 24:9f20bce6184e v0.7

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
move directories, support netpbm 11
author Peter Meerwald-Stadler <pmeerw@pmeerw.net>
date Fri, 20 Dec 2024 13:08:59 +0100
parents Meerwald/gen_kim_sig.c@4987db85cfae
children
comparison
equal deleted inserted replaced
23:71dd4b96221b 24:9f20bce6184e
1 #include "wm.h"
2
3 char *progname;
4
5 void usage(void) {
6 fprintf(stderr, "usage: %s [-a n] [-A n] [-d n] [-e n] [-f n] [-F file] [-l n] [-m n] [-n n] [-o file] [-s file] [-S n]\n\n", progname);
7 fprintf(stderr, "\t-a n\t\talpha factor for detail subbands (default 0.1)\n");
8 fprintf(stderr, "\t-A n\t\talpha factor for approximation subband (default 0.02)\n");
9 fprintf(stderr, "\t-d n\t\tdeviation (default 1.0)\n");
10 fprintf(stderr, "\t-e n\t\twavelet filtering method (default 2)\n");
11 fprintf(stderr, "\t-f n\t\tfilter number (default 1)\n");
12 fprintf(stderr, "\t-F file\t\tfilter definition file (default 'filter.dat')\n");
13 fprintf(stderr, "\t-h\t\tprint usage\n");
14 fprintf(stderr, "\t-l n\t\tdecomposition level (default 4)\n");
15 fprintf(stderr, "\t-m n \t\tmean value (default 0.0)\n");
16 fprintf(stderr, "\t-n n\t\twatermark length (default 1000)\n");
17 fprintf(stderr, "\t-o file\t\toutput file\n");
18 fprintf(stderr, "\t-s file\t\tuse signature file's embedding information\n");
19 fprintf(stderr, "\t-S n\t\tseed\n");
20 exit(0);
21 }
22
23 int main(int argc, char *argv[]) {
24 FILE *out = stdout;
25 FILE *sig = NULL;
26
27 char output_name[MAXPATHLEN] = "(stdout)";
28 char signature_name[MAXPATHLEN];
29
30 int c;
31 int n = 1000;
32 int s = 0;
33 int e = 2;
34 int f = 1;
35 char F[MAXPATHLEN] = "filter.dat";
36 double a = 0.1;
37 double A = 0.02;
38 int l = 4;
39 double m = 0.0;
40 double d = 1.0;
41
42 progname = argv[0];
43
44 while ((c = getopt(argc, argv, "a:A:l:d:e:f:F:h?m:n:o:s:S:")) != EOF) {
45 switch (c) {
46 case 'a':
47 a = atof(optarg);
48 if (a <= 0.0) {
49 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, a);
50 exit(1);
51 }
52 break;
53 case 'A':
54 A = atof(optarg);
55 if (A <= 0.0) {
56 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, a);
57 exit(1);
58 }
59 break;
60 case 'l':
61 l = atoi(optarg);
62 if (l <= 0) {
63 fprintf(stderr, "%s: decomposition level %d out of range\n", progname, l);
64 exit(1);
65 }
66 break;
67 case 'd':
68 d = atof(optarg);
69 if (d <= 0.0) {
70 fprintf(stderr, "%s: deviation %f out of range\n", progname, d);
71 exit(1);
72 }
73 break;
74 case 'e':
75 e = atoi(optarg);
76 if (e < 0) {
77 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, e);
78 }
79 break;
80 case 'f':
81 f = atoi(optarg);
82 if (f <= 0) {
83 fprintf(stderr, "%s: filter number %d out of range\n", progname, f);
84 exit(1);
85 }
86 break;
87 case 'F':
88 strcpy(F, optarg);
89 break;
90 case 'h':
91 case '?':
92 usage();
93 break;
94 case 'm':
95 m = atof(optarg);
96 break;
97 case 'n':
98 n = atoi(optarg);
99 if (n < 1 || n > 32000) {
100 fprintf(stderr, "%s: watermark length %d out of range\n", progname, n);
101 exit(1);
102 }
103 break;
104 case 'o':
105 if ((out = fopen(optarg, "w")) == NULL) {
106 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
107 exit(1);
108 }
109 strcpy(output_name, optarg);
110 break;
111 case 's':
112 if ((sig = fopen(optarg, "r")) == NULL) {
113 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
114 exit(1);
115 }
116 strcpy(signature_name, optarg);
117 break;
118 case 'S':
119 s = atoi(optarg);
120 break;
121 }
122 }
123
124 argc -= optind;
125 argv += optind;
126
127 if (argc > 0) {
128 usage();
129 exit(1);
130 }
131
132 if (sig) {
133 char line[32];
134 fgets(line, sizeof(line), sig);
135 if (strspn(line, "KISG") >= 4) {
136 if (n == 0)
137 fscanf(sig, "%d\n", &n);
138 else
139 fscanf(sig, "%*d\n");
140 if (a == 0.0)
141 fscanf(sig, "%lf\n", &a);
142 else
143 fscanf(sig, "%*f\n");
144 if (A == 0.0)
145 fscanf(sig, "%lf\n", &A);
146 else
147 fscanf(sig, "%*f\n");
148 if (l == 0)
149 fscanf(sig, "%d\n", &l);
150 else
151 fscanf(sig, "%*d\n");
152 if (e < 0)
153 fscanf(sig, "%d\n", &e);
154 else
155 fscanf(sig, "%*d\n");
156 if (f == 0)
157 fscanf(sig, "%d\n", &f);
158 else
159 fscanf(sig, "%*d\n");
160 if (!strcmp(F, ""))
161 fscanf(sig, "%[^\n\r]\n", F);
162 else
163 fscanf(sig, "%*[^\n\r]\n");
164 }
165 else {
166 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
167 exit(1);
168 }
169 }
170
171 if (s)
172 srandom(s);
173 else
174 srandom(time(NULL) * getpid());
175
176 fprintf(out, "KISG\n");
177 fprintf(out, "%d\n", n);
178 fprintf(out, "%f\n", a);
179 fprintf(out, "%f\n", A);
180 fprintf(out, "%d\n", l);
181 fprintf(out, "%d\n", e);
182 fprintf(out, "%d\n", f);
183 fprintf(out, "%s\n", F);
184
185 n >>= 1;
186 while (n > 0) {
187 double x;
188 double x1, x2;
189
190 /*
191 * Algorithm P (Polar method for normal deviates),
192 * Knuth, D., "The Art of Computer Programming", Vol. 2, 3rd Edition, p. 122
193 */
194 do {
195 x1 = 2.0 * ((random() & RAND_MAX) / ((double) RAND_MAX + 1.0)) - 1.0;
196 x2 = 2.0 * ((random() & RAND_MAX) / ((double) RAND_MAX + 1.0)) - 1.0;
197 x = x1 * x1 + x2 * x2;
198 } while (x >= 1.0);
199 x1 *= sqrt((-2.0) * log(x) / x);
200 x2 *= sqrt((-2.0) * log(x) / x);
201
202 fprintf(out, "%f\n", m + d * x1);
203 fprintf(out, "%f\n", m + d * x2);
204
205 n--;
206 }
207
208 fclose(out);
209
210 exit(0);
211 }

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