annotate Meerwald/wm_xie_d.c @ 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 4987db85cfae
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 #include "wm.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
2 #include "signature.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
3 #include "dwt.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
4 #include "pgm.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
6 char *progname;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
7
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
8 // inverse watermarking transformation, extract embedded bit, check quantization boundaries
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
9 double wm_transform(double alpha, double f1, double f2, double f3) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
10 double s = alpha * (fabs(f3) - fabs(f1)) / 2.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
11 double l = f1;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
12 int x;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
13
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
14 x = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
15 while (l < f2) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
16 l += s;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
17 x++;
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 if (fabs(l - s - f2) < fabs(l-f2))
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
21 return (x+1) % 2;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
22 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
23 return (x) % 2;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
24 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
25
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
26 void usage(void) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
27 fprintf(stderr, "usage: %s [-a n] [-e n] [-f n] [-F n] [-h] [-l n] [-o file] [-v n] -s file file\n\n", progname);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
28 fprintf(stderr, "\t-a n\t\tembedding strength (default 0.05)\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
29 fprintf(stderr, "\t-e n\t\twavelet filtering method\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
30 fprintf(stderr, "\t-f n\t\tfilter number\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
31 fprintf(stderr, "\t-F file\t\tfilter definition file\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
32 fprintf(stderr, "\t-l n\t\tembedding level\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
33 fprintf(stderr, "\t-h\t\tprint usage\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
34 fprintf(stderr, "\t-o file\t\textracted signature file\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
35 fprintf(stderr, "\t-s file\t\tsignature to embed in input image\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
36 fprintf(stderr, "\t-v n\t\tverbosity level\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
37 exit(0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
38 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
39
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
40 int main(int argc, char *argv[]) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
41
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
42 FILE *in = stdin;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
43 FILE *out = stdout;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
44 FILE *sig = NULL;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
45
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
46 char output_name[MAXPATHLEN] = "(stdout)";
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
47 char input_name[MAXPATHLEN] = "(stdin)";
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
48 char signature_name[MAXPATHLEN];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
49
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
50 int c, n;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
51 int row, col;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
52
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
53 double alpha = 0.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
54 int filter = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
55 int method = -1;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
56 int level = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
57 char filter_name[MAXPATHLEN] = "";
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
58
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
59 int seed;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
60 int verbose = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
61
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
62 gray **image;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
63 Image_tree dwts, p;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
64
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
65 gray maxval;
8
f83ef905a63d fixing many warnings
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 3
diff changeset
66 int rows, cols, format;
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
67
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
68 progname = argv[0];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
69
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
70 pgm_init(&argc, argv); wm_init2();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
71
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
72 while ((c = getopt(argc, argv, "a:e:f:F:h?l:o:s:v:")) != EOF) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
73 switch (c) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
74 case 'e':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
75 method = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
76 if (method < 0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
77 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
78 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
79 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
80 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
81 case 'f':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
82 filter = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
83 if (filter <= 0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
84 fprintf(stderr, "%s: filter number %d out of range\n", progname, filter);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
85 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
86 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
87 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
88 case 'F':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
89 strcpy(filter_name, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
90 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
91 case 'h':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
92 case '?':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
93 usage();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
94 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
95 case 'l':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
96 level = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
97 if (level < 1) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
98 fprintf(stderr, "%s: embedding level out of range\n", progname);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
99 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
100 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
101 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
102 case 'o':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
103 if ((out = fopen(optarg, "wb")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
104 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
105 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
106 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
107 strcpy(output_name, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
108 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
109 case 'a':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
110 alpha = atof(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
111 if (alpha <= 0.0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
112 fprintf(stderr, "%s: embedding strength factor %f out of range\n", progname, alpha);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
113 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
114 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
115 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
116 case 's':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
117 if ((sig = fopen(optarg, "r")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
118 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
119 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
120 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
121 strcpy(signature_name, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
122 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
123 case 'v':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
124 verbose = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
125 if (verbose < 0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
126 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
127 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
128 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
129 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
130 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
131 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
132
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
133 argc -= optind;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
134 argv += optind;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
135
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
136 if (argc > 1) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
137 usage();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
138 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
139 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
140
8
f83ef905a63d fixing many warnings
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 3
diff changeset
141 if (argc == 1 && *argv[0] != '-') {
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
142 if ((in = fopen(argv[0], "rb")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
143 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
144 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
145 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
146 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
147 strcpy(input_name, argv[0]);
8
f83ef905a63d fixing many warnings
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 3
diff changeset
148 }
f83ef905a63d fixing many warnings
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 3
diff changeset
149
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
150 if (sig) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
151 char line[32];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
152 fgets(line, sizeof(line), sig);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
153 if (strspn(line, "XESG") >= 4) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
154 fscanf(sig, "%d\n", &nbit_signature);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
155 if (alpha == 0.0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
156 fscanf(sig, "%lf\n", &alpha);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
157 else
16
4987db85cfae fix another scanf() warning
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 15
diff changeset
158 fscanf(sig, "%*f\n");
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
159 if (method < 0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
160 fscanf(sig, "%d\n", &method);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
161 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
162 fscanf(sig, "%*d\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
163 if (filter == 0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
164 fscanf(sig, "%d\n", &filter);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
165 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
166 fscanf(sig, "%*d\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
167 if (!strcmp(filter_name, ""))
15
ad1d224896c5 fix scanf() warning
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 8
diff changeset
168 fscanf(sig, "%[^\n\r]\n", filter_name);
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
169 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
170 fscanf(sig, "%*[^\n\r]\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
171 if (level == 0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
172 fscanf(sig, "%d\n", &level);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
173 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
174 fscanf(sig, "%*d\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
175 fscanf(sig, "%d\n", &seed);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
176 srandom(seed);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
177 n_signature = NBITSTOBYTES(nbit_signature);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
178 fread(signature, sizeof(char), n_signature, sig);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
179 fscanf(sig, "\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
180 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
181 else {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
182 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
183 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
184 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
185 fclose(sig);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
186 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
187 else {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
188 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
189 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
190 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
191
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
192 pgm_readpgminit(in, &cols, &rows, &maxval, &format);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
193 if (verbose > 0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
194 fprintf(stderr, "%s: embedding %d bits with strength %f in\n"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
195 " %d x %d host image, decomposition level %d\n",
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
196 progname, nbit_signature, alpha, cols, rows, level);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
197
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
198 image = pgm_allocarray(cols, rows);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
199 for (row = 0; row < rows; row++)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
200 pgm_readpgmrow(in, image[row], cols, maxval, format);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
201 fclose(in);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
202
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
203 // decomposition of image
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
204 init_dwt(cols, rows, filter_name, filter, level, method);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
205 #ifdef POLLEN_STUFF
3
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 0
diff changeset
206 #include "pollen_stuff.c"
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
207 #endif
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
208 #ifdef PARAM_STUFF
3
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 0
diff changeset
209 #include "param_stuff.c"
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
210 #endif
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
211
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
212 dwts = fdwt(image);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
213
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
214 p = dwts;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
215
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
216 // consider each resolution level
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
217 while (p->level < level)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
218 // descend one level
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
219 p = p->coarse;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
220
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
221 // repeat binary watermark by sliding a 3-pixel window of approximation image
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
222 n = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
223 for (row = 0; row < p->image->height; row++) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
224 for (col = 0; col < p->image->width - 3; col += 3) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
225 double b1, b2, b3;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
226 double *f1 = &b1, *f2 = &b2, *f3 = &b3;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
227
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
228 // get all three approximation pixels in window
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
229 b1 = get_pixel(p->image, col + 0, row);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
230 b2 = get_pixel(p->image, col + 1, row);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
231 b3 = get_pixel(p->image, col + 2, row);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
232
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
233 // bring selected pixels in ascending order
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
234 #define SWAP(A, B) {double *t = A; A = B; B = t;}
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
235 if (*f1 > *f2) SWAP(f1, f2);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
236 if (*f2 > *f3) SWAP(f2, f3);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
237 if (*f1 > *f2) SWAP(f1, f2);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
238
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
239 set_signature_bit(n, wm_transform(alpha, *f1, *f2, *f3));
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
240
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
241 if (verbose > 1)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
242 fprintf(stderr, "%s: extracting #%d (= %d) at (%d/%d); %f < %f < %f\n",
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
243 progname, n, get_signature_bit(n % nbit_signature), col, row, *f1, *f2, *f3);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
244
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
245 n++;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
246 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
247 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
248
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
249 fprintf(out, "XEWM\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
250 fprintf(out, "%d\n", n);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
251 fwrite(signature, sizeof(char), NBITSTOBYTES(n), out);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
252 fprintf(out, "\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
253 fclose(out);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
254
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
255 pgm_freearray(image, rows);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
256
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
257 exit(0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
258 }

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