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comparison Meerwald/wm_zhu_d.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
equal deleted inserted replaced
-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 file] [-h] [-l n] [-o file] [-v n] -s file -i file file\n\n", progname);
9 fprintf(stderr, "\t-a n\t\talpha factor\n");
10 fprintf(stderr, "\t-b n\t\tbeta factor\n");
11 fprintf(stderr, "\t-e n\t\twavelet filtering method\n");
12 fprintf(stderr, "\t-f n\t\tfilter number\n");
13 fprintf(stderr, "\t-F file\t\tfilter definition file\n");
14 fprintf(stderr, "\t-h\t\tprint usage\n");
15 fprintf(stderr, "\t-i file\t\toriginal image file\n");
16 fprintf(stderr, "\t-l n\t\tdecomposition level\n");
17 fprintf(stderr, "\t-o file\t\tfile for extracted watermark\n");
18 fprintf(stderr, "\t-s file\t\toriginal signature file\n");
19 fprintf(stderr, "\t-v n\t\tverbosity level\n");
20 exit(0);
21 }
22
23 void write_mark(FILE *out, double watermark[], int n) {
24 int i;
25
26 fprintf(out, "%d\n", n);
27 for (i = 0; i < n; i++)
28 fprintf(out, "%f\n", watermark[i]);
29 }
30
31 int main(int argc, char *argv[]) {
32
33 FILE *in = stdin;
34 FILE *out = stdout;
35 FILE *orig = NULL;
36 FILE *sig = NULL;
37
38 gray **input_image;
39 gray **orig_image;
40
41 char signature_name[MAXPATHLEN];
42 char output_name[MAXPATHLEN] = "(stdout)";
43 char input_name[MAXPATHLEN] = "(stdin)";
44 char orig_name[MAXPATHLEN];
45
46 int c, w;
47 int i;
48 int n = 0;
49 int method = -1;
50 int filter = 0;
51 char filter_name[MAXPATHLEN] = "";
52
53 int level = 0, levels;
54 double alpha = 0.0;
55
56 int in_rows, in_cols, in_format;
57 gray in_maxval;
58 int orig_rows, orig_cols, orig_format;
59 gray orig_maxval;
60 int rows, cols;
61 int row, col;
62
63 double *watermark;
64
65 Image_tree input_dwts, orig_dwts, p, q;
66
67 int verbose = 0;
68
69 progname = argv[0];
70
71 pgm_init(&argc, argv); wm_init2();
72
73 while ((c = getopt(argc, argv, "a:e:f:F:h?i:l:o:s:v:")) != EOF) {
74 switch (c) {
75 case 'a':
76 alpha = atof(optarg);
77 if (alpha <= 0.0) {
78 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha);
79 exit(1);
80 }
81 break;
82 case 'e':
83 method = atoi(optarg);
84 if (method < 0) {
85 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method);
86 exit(1);
87 }
88 break;
89 case 'f':
90 filter = atoi(optarg);
91 if (filter <= 0) {
92 fprintf(stderr, "%s: filter number %d out of range\n", progname, filter);
93 exit(1);
94 }
95 break;
96 case 'F':
97 strcpy(filter_name, optarg);
98 break;
99 case 'h':
100 case '?':
101 usage();
102 break;
103 case 'i':
104 if ((orig = fopen(optarg, "rb")) == NULL) {
105 fprintf(stderr, "%s: unable to open original image file %s\n", progname, optarg);
106 exit(1);
107 }
108 strcpy(orig_name, optarg);
109 break;
110 case 'l':
111 level = atoi(optarg);
112 if (level <= 0) {
113 fprintf(stderr, "%s: decomposition level %d out of range\n", progname, level);
114 exit(1);
115 }
116 break;
117 case 'o':
118 if ((out = fopen(optarg, "w")) == NULL) {
119 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
120 exit(1);
121 }
122 strcpy(output_name, optarg);
123 break;
124 case 's':
125 if ((sig = fopen(optarg, "r")) == NULL) {
126 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
127 exit(1);
128 }
129 strcpy(signature_name, optarg);
130 break;
131 case 'v':
132 verbose = atoi(optarg);
133 if (verbose < 0) {
134 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose);
135 exit(1);
136 }
137 break;
138 }
139 }
140
141 argc -= optind;
142 argv += optind;
143
144 if (argc > 1) {
145 usage();
146 exit(1);
147 }
148
149 if (argc == 1 && *argv[0] != '-')
150 if ((in = fopen(argv[0], "rb")) == NULL) {
151 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
152 exit(1);
153 }
154 else
155 strcpy(input_name, argv[0]);
156
157 if (!orig) {
158 fprintf(stderr, "%s: original image file not specified, use -i file option\n", progname);
159 exit(1);
160 }
161
162 if (sig) {
163 char line[32];
164 fgets(line, sizeof(line), sig);
165 if (strspn(line, "ZHSG") >= 4) {
166 fscanf(sig, "%d\n", &n);
167 if (alpha == 0.0)
168 fscanf(sig, "%lf\n", &alpha);
169 else
170 fscanf(sig, "%*lf\n");
171 if (level == 0)
172 fscanf(sig, "%d\n", &level);
173 else
174 fscanf(sig, "%*d\n");
175 if (method < 0)
176 fscanf(sig, "%d\n", &method);
177 else
178 fscanf(sig, "%*d\n");
179 if (filter == 0)
180 fscanf(sig, "%d\n", &filter);
181 else
182 fscanf(sig, "%*d\n");
183 if (!strcmp(filter_name, ""))
184 fscanf(sig, "%[^\n\r]\n", &filter_name);
185 else
186 fscanf(sig, "%*[^\n\r]\n");
187 }
188 else {
189 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
190 exit(1);
191 }
192 fclose(sig);
193 }
194 else {
195 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname);
196 exit(1);
197 }
198
199 pgm_readpgminit(in, &in_cols, &in_rows, &in_maxval, &in_format);
200 pgm_readpgminit(orig, &orig_cols, &orig_rows, &orig_maxval, &orig_format);
201
202 if (in_cols != orig_cols || in_rows != orig_rows) {
203 fprintf(stderr, "%s: input image %s does not match dimensions of original image %s\n", progname, input_name, orig_name);
204 exit(1);
205 }
206
207 cols = in_cols;
208 rows = in_rows;
209
210 input_image = pgm_allocarray(in_cols, in_rows);
211 orig_image = pgm_allocarray(orig_cols, orig_rows);
212
213 for (row = 0; row < in_rows; row++) {
214 pgm_readpgmrow(in, input_image[row], in_cols, in_maxval, in_format);
215 pgm_readpgmrow(orig, orig_image[row], orig_cols, orig_maxval, orig_format);
216 }
217
218 fclose(in);
219 fclose(orig);
220
221 // complete decomposition
222 levels = find_deepest_level(cols, rows) - 1;
223 if (level > levels) {
224 fprintf(stderr, "%s: decomposition level %d not possible (max. %d), image size is %d x %d\n", progname, level, levels, cols, rows);
225 exit(1);
226 }
227
228 init_dwt(cols, rows, filter_name, filter, levels, method);
229 #ifdef POLLEN_STUFF
230 #include "pollen_stuff.xxx"
231 #endif
232 #ifdef PARAM_STUFF
233 #include "param_stuff.xxx"
234 #endif
235
236 input_dwts = fdwt(input_image);
237 orig_dwts = fdwt(orig_image);
238
239 watermark = malloc(n * sizeof(double));
240 if (!watermark) {
241 fprintf(stderr, "%s: malloc() failed\n\n", progname);
242 exit(1);
243 }
244
245 fprintf(out, "ZHWM\n");
246 fprintf(out, "%d\n", n);
247 fprintf(out, "%d\n", level);
248
249 p = input_dwts;
250 q = orig_dwts;
251 while (p->coarse && q->coarse) {
252 double *collected_coeffs, *largest;
253 int subband_size = q->horizontal->image->size;
254 int maxselect = MIN(3 * subband_size, n + 1);
255 double threshold;
256
257 collected_coeffs = malloc(3 * subband_size * sizeof(double));
258 if (!collected_coeffs) {
259 fprintf(stderr, "%s: malloc() failed\n", progname);
260 exit(1);
261 }
262
263 for (i = 0; i < subband_size; i++) {
264 collected_coeffs[3 * i + 0] = q->horizontal->image->data[i];
265 collected_coeffs[3 * i + 1] = q->vertical->image->data[i];
266 collected_coeffs[3 * i + 2] = q->diagonal->image->data[i];
267 }
268
269 largest = malloc(maxselect * sizeof(double));
270 if (!largest) {
271 fprintf(stderr, "%s: malloc() failed\n", progname);
272 exit(1);
273 }
274
275 select_largest_coeffs(collected_coeffs, 3 * subband_size, maxselect, largest);
276 threshold = largest[0];
277 free(largest);
278 free(collected_coeffs);
279
280 w = 0;
281 for (i = 0; i < subband_size && w < n; i++) {
282 if (q->horizontal->image->data[i] > threshold)
283 watermark[w++] = (p->horizontal->image->data[i] / q->horizontal->image->data[i] - 1.0) / alpha;
284 if (q->vertical->image->data[i] > threshold)
285 watermark[w++] = (p->vertical->image->data[i] / q->vertical->image->data[i] - 1.0) / alpha;
286 if (q->diagonal->image->data[i] > threshold)
287 watermark[w++] = (p->diagonal->image->data[i] / q->diagonal->image->data[i] - 1.0) / alpha;
288 }
289
290 write_mark(out, watermark, w);
291
292 p = p->coarse;
293 q = q->coarse;
294 }
295
296 fclose(out);
297
298 free(watermark);
299
300 pgm_freearray(input_image, rows);
301 pgm_freearray(orig_image, rows);
302
303 exit(0);
304 }

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