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comparison Meerwald/wm_corvi_e.c @ 0:be303a3f5ea8

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import
author Peter Meerwald <pmeerw@cosy.sbg.ac.at>
date Sun, 12 Aug 2007 13:14:34 +0200
parents
children acb6967ee76d
comparison
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-1:000000000000 0:be303a3f5ea8
1 #include "wm.h"
2 #include "dwt.h"
3 #include "pgm.h"
4
5 char *progname;
6
7 void usage(void) {
8 fprintf(stderr, "usage: %s [-a n] [-e n] [-f n] [-F n] [-h] [-o file] [-v n] -s file file\n\n", progname);
9 fprintf(stderr, "\t-a n\t\talpha factor/embedding strength\n");
10 fprintf(stderr, "\t-e n\t\twavelet filtering method\n");
11 fprintf(stderr, "\t-f n\t\tfilter number\n");
12 fprintf(stderr, "\t-F file\t\tfilter definition file\n");
13 fprintf(stderr, "\t-h\t\tprint usage\n");
14 fprintf(stderr, "\t-o file\t\toutput (watermarked) file\n");
15 fprintf(stderr, "\t-s file\t\tsignature to embed in input image\n");
16 fprintf(stderr, "\t-v n\t\tverbosity level\n");
17 exit(0);
18 }
19
20 int main(int argc, char *argv[]) {
21
22 FILE *in = stdin;
23 FILE *out = stdout;
24 FILE *sig = NULL;
25
26 char output_name[MAXPATHLEN] = "(stdout)";
27 char input_name[MAXPATHLEN] = "(stdin)";
28 char signature_name[MAXPATHLEN];
29
30 int c;
31 int row, col;
32
33 int n;
34
35 double alpha = 0.0;
36
37 int filter = 0;
38 int method = -1;
39 int level;
40 char filter_name[MAXPATHLEN] = "";
41
42 int verbose = 0;
43
44 gray **image;
45 Image_tree dwts;
46
47 gray maxval;
48 int rows, cols, colors, format;
49
50 progname = argv[0];
51
52 pgm_init(&argc, argv); wm_init();
53
54 while ((c = getopt(argc, argv, "a:e:f:F:h?o:s:v:")) != EOF) {
55 switch (c) {
56 case 'a':
57 alpha = atof(optarg);
58 if (alpha <= 0.0) {
59 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha);
60 exit(1);
61 }
62 break;
63 case 'e':
64 method = atoi(optarg);
65 if (method < 0) {
66 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method);
67 exit(1);
68 }
69 break;
70 case 'f':
71 filter = atoi(optarg);
72 if (filter <= 0) {
73 fprintf(stderr, "%s: filter number %d out of range\n", progname, filter);
74 exit(1);
75 }
76 break;
77 case 'F':
78 strcpy(filter_name, optarg);
79 break;
80 case 'h':
81 case '?':
82 usage();
83 break;
84 case 'o':
85 if ((out = fopen(optarg, "wb")) == NULL) {
86 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
87 exit(1);
88 }
89 strcpy(output_name, optarg);
90 break;
91 case 's':
92 if ((sig = fopen(optarg, "r")) == NULL) {
93 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
94 exit(1);
95 }
96 strcpy(signature_name, optarg);
97 break;
98 case 'v':
99 verbose = atoi(optarg);
100 if (verbose < 0) {
101 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose);
102 exit(1);
103 }
104 break;
105 }
106 }
107
108 argc -= optind;
109 argv += optind;
110
111 if (argc > 1) {
112 usage();
113 exit(1);
114 }
115
116 if (argc == 1 && *argv[0] != '-')
117 if ((in = fopen(argv[0], "rb")) == NULL) {
118 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
119 exit(1);
120 }
121 else
122 strcpy(input_name, argv[0]);
123
124 if (sig) {
125 char line[32];
126 fgets(line, sizeof(line), sig);
127 if (strspn(line, "CVSG") >= 4) {
128 fscanf(sig, "%d\n", &n);
129 if (alpha == 0.0)
130 fscanf(sig, "%lf\n", &alpha);
131 else
132 fscanf(sig, "%*lf\n");
133 if (method < 0)
134 fscanf(sig, "%d\n", &method);
135 else
136 fscanf(sig, "%*d\n");
137 if (filter == 0)
138 fscanf(sig, "%d\n", &filter);
139 else
140 fscanf(sig, "%*d\n");
141 if (!strcmp(filter_name, ""))
142 fscanf(sig, "%[^\n\r]\n", &filter_name);
143 else
144 fscanf(sig, "%*[^\n\r]\n");
145 }
146 else {
147 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
148 exit(1);
149 }
150 }
151 else {
152 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname);
153 exit(1);
154 }
155
156 pgm_readpgminit(in, &cols, &rows, &maxval, &format);
157
158 image = pgm_allocarray(cols, rows);
159
160 for (row = 0; row < rows; row++)
161 pgm_readpgmrow(in, image[row], cols, maxval, format);
162
163 fclose(in);
164
165 level = 0;
166 row = rows;
167 col = cols;
168 while (n < row * col / 4.0 && row >= 2 && col >= 2) {
169 row /= 2;
170 col /= 2;
171 level++;
172 }
173
174 if (verbose >= 2) {
175 fprintf(stderr, "%s: embedding into coarse image (x %d/y %d) at level %d\n", progname, col, row, level);
176 }
177
178 init_dwt(cols, rows, filter_name, filter, level, method);
179 #ifdef POLLEN_STUFF
180 #include "pollen_stuff.xxx"
181 #endif
182 #ifdef PARAM_STUFF
183 #include "param_stuff.xxx"
184 #endif
185
186 dwts = fdwt(image);
187
188 {
189 Image_tree p = dwts;
190 Image img;
191 double med;
192
193 while (!p->image)
194 p = p->coarse;
195
196 img = p->image;
197
198 med = 0.0;
199 for (row = 0; row < img->height; row++)
200 for (col = 0; col < img->width; col++)
201 med += get_pixel(img, col, row);
202
203 med /= (double) (img->height * img->width);
204
205 row = 0;
206 col = 0;
207 while (n > 0) {
208 double pix;
209 double g;
210
211 fscanf(sig, "%lf\n", &g);
212
213 pix = get_pixel(img, col, row);
214 pix = med + (pix - med) * (1.0 + alpha * g);
215 set_pixel(img, col, row, pix);
216
217 if (++col == img->width) { col = 0; row++; }
218 n--;
219 }
220 }
221
222 fclose(sig);
223
224 idwt(dwts, image);
225
226 pgm_writepgminit(out, cols, rows, maxval, 0);
227
228 for (row = 0; row < rows; row++)
229 pgm_writepgmrow(out, image[row], cols, maxval, 0);
230
231 fclose(out);
232
233 pgm_freearray(image, rows);
234
235 exit(0);
236 }

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