|
0
|
1 #include "wm.h"
|
|
|
2 #include "dwt.h"
|
|
|
3 #include "pgm.h"
|
|
|
4 #include "dwt_util.h"
|
|
|
5 #include "kim_common.h"
|
|
|
6
|
|
|
7 char *progname;
|
|
|
8
|
|
|
9 void usage(void) {
|
|
|
10 fprintf(stderr, "usage: %s [-a n] [-A n] [-e n] [-f n] [-F file] [-h] [-l n] [-o file] [-v n] -s file -i file file\n\n", progname);
|
|
|
11 fprintf(stderr, "\t-a n\t\talpha factor for detail subband\n");
|
|
|
12 fprintf(stderr, "\t-A n\t\talpha factor for approximation image\n");
|
|
|
13 fprintf(stderr, "\t-e n\t\twavelet filtering method\n");
|
|
|
14 fprintf(stderr, "\t-f n\t\tfilter number\n");
|
|
|
15 fprintf(stderr, "\t-F file\t\tfilter definition file\n");
|
|
|
16 fprintf(stderr, "\t-h\t\tprint usage\n");
|
|
|
17 fprintf(stderr, "\t-i file\t\toriginal image file\n");
|
|
|
18 fprintf(stderr, "\t-l n\t\tdecomposition level\n");
|
|
|
19 fprintf(stderr, "\t-o file\t\tfile for extracted watermark\n");
|
|
|
20 fprintf(stderr, "\t-s file\t\toriginal signature file\n");
|
|
|
21 fprintf(stderr, "\t-v n\t\tverbosity level\n");
|
|
|
22 exit(0);
|
|
|
23 }
|
|
|
24
|
|
|
25 int extract_subband(Image_tree s, Image_tree t, int name, double alpha, double watermark[], double threshold, int w, int n, int verbose) {
|
|
|
26 int i, j;
|
|
|
27
|
|
|
28 for (i = 5; i < s->image->height-5; i++)
|
|
|
29 for (j = 5; j < s->image->width-5; j++) {
|
|
|
30 double orig_coeff, input_coeff;
|
|
|
31
|
|
|
32 orig_coeff = get_pixel(s->image, i, j);
|
|
|
33 input_coeff = get_pixel(t->image, i, j);
|
|
|
34 if (fabs(orig_coeff) > threshold) {
|
|
|
35 watermark[w++] = (input_coeff - orig_coeff) / (alpha * orig_coeff);
|
|
|
36 }
|
|
|
37 }
|
|
|
38
|
|
|
39 if (verbose > 5)
|
|
|
40 fprintf(stderr, "%s: extracted %s%d, size %d x %d; %d coeffs. total\n",
|
|
|
41 progname, subband_name(name), s->level, s->image->width, s->image->height, w);
|
|
|
42
|
|
|
43 return w;
|
|
|
44 }
|
|
|
45
|
|
|
46 void write_mark(FILE *out, double watermark[], int n) {
|
|
|
47 int i;
|
|
|
48
|
|
|
49 fprintf(out, "%d\n", n);
|
|
|
50 for (i = 0; i < n; i++)
|
|
|
51 fprintf(out, "%f\n", watermark[i]);
|
|
|
52 }
|
|
|
53
|
|
|
54 int main(int argc, char *argv[]) {
|
|
|
55
|
|
|
56 FILE *in = stdin;
|
|
|
57 FILE *out = stdout;
|
|
|
58 FILE *orig = NULL;
|
|
|
59 FILE *sig = NULL;
|
|
|
60
|
|
|
61 gray **input_image;
|
|
|
62 gray **orig_image;
|
|
|
63
|
|
|
64 char signature_name[MAXPATHLEN];
|
|
|
65 char output_name[MAXPATHLEN] = "(stdout)";
|
|
|
66 char input_name[MAXPATHLEN] = "(stdin)";
|
|
|
67 char orig_name[MAXPATHLEN];
|
|
|
68
|
|
|
69 int c, w;
|
|
|
70 int n = 0;
|
|
|
71 int method = -1;
|
|
|
72 int filter = 0;
|
|
|
73 char filter_name[MAXPATHLEN] = "";
|
|
|
74
|
|
|
75 int level = 0, levels;
|
|
|
76 double alpha_detail = 0.0;
|
|
|
77 double alpha_approx = 0.0;
|
|
|
78
|
|
|
79 int in_rows, in_cols, in_format;
|
|
|
80 gray in_maxval;
|
|
|
81 int orig_rows, orig_cols, orig_format;
|
|
|
82 gray orig_maxval;
|
|
|
83 int rows, cols;
|
|
8
|
84 int row;
|
|
0
|
85
|
|
|
86 double *watermark;
|
|
|
87
|
|
|
88 Image_tree input_dwts, orig_dwts, p, q;
|
|
|
89
|
|
|
90 int verbose = 0;
|
|
|
91
|
|
|
92 progname = argv[0];
|
|
|
93
|
|
|
94 pgm_init(&argc, argv); wm_init2();
|
|
|
95
|
|
|
96 while ((c = getopt(argc, argv, "a:A:e:f:F:h?i:l:o:s:v:")) != EOF) {
|
|
|
97 switch (c) {
|
|
|
98 case 'a':
|
|
|
99 alpha_detail = atof(optarg);
|
|
|
100 if (alpha_detail <= 0.0) {
|
|
|
101 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha_detail);
|
|
|
102 exit(1);
|
|
|
103 }
|
|
|
104 break;
|
|
|
105 case 'A':
|
|
|
106 alpha_approx = atof(optarg);
|
|
|
107 if (alpha_approx <= 0.0) {
|
|
|
108 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha_approx);
|
|
|
109 exit(1);
|
|
|
110 }
|
|
|
111 break;
|
|
|
112 case 'e':
|
|
|
113 method = atoi(optarg);
|
|
|
114 if (method < 0) {
|
|
|
115 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method);
|
|
|
116 exit(1);
|
|
|
117 }
|
|
|
118 break;
|
|
|
119 case 'f':
|
|
|
120 filter = atoi(optarg);
|
|
|
121 if (filter <= 0) {
|
|
|
122 fprintf(stderr, "%s: filter number %d out of range\n", progname, filter);
|
|
|
123 exit(1);
|
|
|
124 }
|
|
|
125 break;
|
|
|
126 case 'F':
|
|
|
127 strcpy(filter_name, optarg);
|
|
|
128 break;
|
|
|
129 case 'h':
|
|
|
130 case '?':
|
|
|
131 usage();
|
|
|
132 break;
|
|
|
133 case 'i':
|
|
|
134 if ((orig = fopen(optarg, "rb")) == NULL) {
|
|
|
135 fprintf(stderr, "%s: unable to open original image file %s\n", progname, optarg);
|
|
|
136 exit(1);
|
|
|
137 }
|
|
|
138 strcpy(orig_name, optarg);
|
|
|
139 break;
|
|
|
140 case 'l':
|
|
|
141 level = atoi(optarg);
|
|
|
142 if (level <= 0) {
|
|
|
143 fprintf(stderr, "%s: decomposition level %d out of range\n", progname, level);
|
|
|
144 exit(1);
|
|
|
145 }
|
|
|
146 break;
|
|
|
147 case 'o':
|
|
|
148 if ((out = fopen(optarg, "w")) == NULL) {
|
|
|
149 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
|
|
|
150 exit(1);
|
|
|
151 }
|
|
|
152 strcpy(output_name, optarg);
|
|
|
153 break;
|
|
|
154 case 's':
|
|
|
155 if ((sig = fopen(optarg, "r")) == NULL) {
|
|
|
156 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
|
|
|
157 exit(1);
|
|
|
158 }
|
|
|
159 strcpy(signature_name, optarg);
|
|
|
160 break;
|
|
|
161 case 'v':
|
|
|
162 verbose = atoi(optarg);
|
|
|
163 if (verbose < 0) {
|
|
|
164 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose);
|
|
|
165 exit(1);
|
|
|
166 }
|
|
|
167 break;
|
|
|
168 }
|
|
|
169 }
|
|
|
170
|
|
|
171 argc -= optind;
|
|
|
172 argv += optind;
|
|
|
173
|
|
|
174 if (argc > 1) {
|
|
|
175 usage();
|
|
|
176 exit(1);
|
|
|
177 }
|
|
|
178
|
|
8
|
179 if (argc == 1 && *argv[0] != '-') {
|
|
0
|
180 if ((in = fopen(argv[0], "rb")) == NULL) {
|
|
|
181 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
|
|
|
182 exit(1);
|
|
|
183 }
|
|
|
184 else
|
|
|
185 strcpy(input_name, argv[0]);
|
|
8
|
186 }
|
|
|
187
|
|
0
|
188 if (!orig) {
|
|
|
189 fprintf(stderr, "%s: original image file not specified, use -i file option\n", progname);
|
|
|
190 exit(1);
|
|
|
191 }
|
|
|
192
|
|
|
193 if (sig) {
|
|
|
194 char line[32];
|
|
|
195 fgets(line, sizeof(line), sig);
|
|
|
196 if (strspn(line, "KISG") >= 4) {
|
|
|
197 fscanf(sig, "%d\n", &n);
|
|
|
198 if (alpha_detail == 0.0)
|
|
|
199 fscanf(sig, "%lf\n", &alpha_detail);
|
|
|
200 else
|
|
|
201 fscanf(sig, "%*lf\n");
|
|
|
202 if (alpha_approx == 0.0)
|
|
|
203 fscanf(sig, "%lf\n", &alpha_approx);
|
|
|
204 else
|
|
|
205 fscanf(sig, "%*lf\n");
|
|
|
206 if (level == 0)
|
|
|
207 fscanf(sig, "%d\n", &level);
|
|
|
208 else
|
|
|
209 fscanf(sig, "%*d\n");
|
|
|
210 if (method < 0)
|
|
|
211 fscanf(sig, "%d\n", &method);
|
|
|
212 else
|
|
|
213 fscanf(sig, "%*d\n");
|
|
|
214 if (filter == 0)
|
|
|
215 fscanf(sig, "%d\n", &filter);
|
|
|
216 else
|
|
|
217 fscanf(sig, "%*d\n");
|
|
|
218 if (!strcmp(filter_name, ""))
|
|
15
|
219 fscanf(sig, "%[^\n\r]\n", filter_name);
|
|
0
|
220 else
|
|
|
221 fscanf(sig, "%*[^\n\r]\n");
|
|
|
222 }
|
|
|
223 else {
|
|
|
224 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
|
|
|
225 exit(1);
|
|
|
226 }
|
|
|
227 fclose(sig);
|
|
|
228 }
|
|
|
229 else {
|
|
|
230 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname);
|
|
|
231 exit(1);
|
|
|
232 }
|
|
|
233
|
|
|
234 pgm_readpgminit(in, &in_cols, &in_rows, &in_maxval, &in_format);
|
|
|
235 pgm_readpgminit(orig, &orig_cols, &orig_rows, &orig_maxval, &orig_format);
|
|
|
236
|
|
|
237 if (in_cols != orig_cols || in_rows != orig_rows) {
|
|
|
238 fprintf(stderr, "%s: input image %s does not match dimensions of original image %s\n", progname, input_name, orig_name);
|
|
|
239 exit(1);
|
|
|
240 }
|
|
|
241
|
|
|
242 cols = in_cols;
|
|
|
243 rows = in_rows;
|
|
|
244
|
|
|
245 input_image = pgm_allocarray(in_cols, in_rows);
|
|
|
246 orig_image = pgm_allocarray(orig_cols, orig_rows);
|
|
|
247
|
|
|
248 for (row = 0; row < in_rows; row++) {
|
|
|
249 pgm_readpgmrow(in, input_image[row], in_cols, in_maxval, in_format);
|
|
|
250 pgm_readpgmrow(orig, orig_image[row], orig_cols, orig_maxval, orig_format);
|
|
|
251 }
|
|
|
252
|
|
|
253 fclose(in);
|
|
|
254 fclose(orig);
|
|
|
255
|
|
|
256 // complete decomposition
|
|
|
257 levels = find_deepest_level(cols, rows) - 1;
|
|
|
258 if (level > levels) {
|
|
|
259 fprintf(stderr, "%s: decomposition level %d not possible (max. %d), image size is %d x %d\n", progname, level, levels, cols, rows);
|
|
|
260 exit(1);
|
|
|
261 }
|
|
|
262
|
|
|
263 init_dwt(cols, rows, filter_name, filter, level, method);
|
|
|
264 #ifdef POLLEN_STUFF
|
|
3
|
265 #include "pollen_stuff.c"
|
|
0
|
266 #endif
|
|
|
267 #ifdef PARAM_STUFF
|
|
3
|
268 #include "param_stuff.c"
|
|
0
|
269 #endif
|
|
|
270
|
|
|
271 input_dwts = fdwt(input_image);
|
|
|
272 orig_dwts = fdwt(orig_image);
|
|
|
273
|
|
|
274 watermark = malloc((rows * cols) * sizeof(double));
|
|
|
275 if (!watermark) {
|
|
|
276 fprintf(stderr, "%s: malloc() failed\n\n", progname);
|
|
|
277 exit(1);
|
|
|
278 }
|
|
|
279
|
|
|
280 p = input_dwts;
|
|
|
281 q = orig_dwts;
|
|
|
282 w = 0;
|
|
|
283 while (p->coarse && q->coarse) {
|
|
|
284 int current_level;
|
|
|
285 double threshold;
|
|
|
286 double max_coeff;
|
|
|
287 double alpha;
|
|
|
288
|
|
|
289 // get current decomposition level number
|
|
|
290 current_level = q->horizontal->level;
|
|
|
291
|
|
|
292 // find largest absolute coefficient in detail subbands of current decomposition level
|
|
|
293 max_coeff = find_level_largest_coeff(q, verbose);
|
|
|
294
|
|
|
295 // calculate significance threshold for current decomposition level
|
|
|
296 threshold = calc_level_threshold(max_coeff, verbose);
|
|
|
297
|
|
|
298 // calculate embedding strength alpha for current decomposition level
|
|
|
299 alpha = calc_level_alpha_detail(alpha_detail, level, current_level, verbose);
|
|
|
300
|
|
|
301 if (verbose > 1)
|
|
|
302 fprintf(stderr, "%s: level %d, threshold %f, alpha %f\n", progname, current_level, threshold, alpha);
|
|
|
303
|
|
|
304 w = extract_subband(q->horizontal, p->horizontal, HORIZONTAL, alpha, watermark, threshold, w, n, verbose);
|
|
|
305 w = extract_subband(q->vertical, p->vertical, VERTICAL, alpha, watermark, threshold, w, n, verbose);
|
|
|
306 w = extract_subband(q->diagonal, p->diagonal, DIAGONAL, alpha, watermark, threshold, w, n, verbose);
|
|
|
307
|
|
|
308 p = p->coarse;
|
|
|
309 q = q->coarse;
|
|
|
310 }
|
|
|
311
|
|
|
312 // extract watermark from approximation image using calculated significance threshold and embedding strength
|
|
|
313 w = extract_subband(q, p, COARSE, alpha_approx, watermark, calc_level_threshold(find_subband_largest_coeff(q, COARSE, verbose), verbose), w, n, verbose);
|
|
|
314
|
|
|
315 fprintf(out, "KIWM\n");
|
|
|
316 write_mark(out, watermark, w);
|
|
|
317
|
|
|
318 fclose(out);
|
|
|
319
|
|
|
320 free(watermark);
|
|
|
321
|
|
|
322 pgm_freearray(input_image, rows);
|
|
|
323 pgm_freearray(orig_image, rows);
|
|
|
324
|
|
|
325 exit(0);
|
|
|
326 }
|
