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