|
0
|
1 #include "wm.h"
|
|
|
2 #include "dwt.h"
|
|
|
3 #include "pgm.h"
|
|
|
4 #include "sort.h"
|
|
|
5
|
|
|
6 char *progname;
|
|
|
7
|
|
|
8 void usage(void) {
|
|
|
9 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);
|
|
|
10 fprintf(stderr, "\t-a n\t\talpha factor/embedding strength\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-l n\t\tdecomposition level\n");
|
|
|
16 fprintf(stderr, "\t-o file\t\toutput (watermarked) file\n");
|
|
|
17 fprintf(stderr, "\t-s file\t\tsignature to embed in input image\n");
|
|
|
18 fprintf(stderr, "\t-v n\t\tverbosity level\n");
|
|
|
19 exit(0);
|
|
|
20 }
|
|
|
21
|
|
|
22 int main(int argc, char *argv[]) {
|
|
|
23
|
|
|
24 FILE *in = stdin;
|
|
|
25 FILE *out = stdout;
|
|
|
26 FILE *sig = NULL;
|
|
|
27
|
|
|
28 char output_name[MAXPATHLEN] = "(stdout)";
|
|
|
29 char input_name[MAXPATHLEN] = "(stdin)";
|
|
|
30 char signature_name[MAXPATHLEN];
|
|
|
31
|
|
|
32 int i, c, w;
|
|
8
|
33 int row;
|
|
0
|
34
|
|
|
35 int n;
|
|
|
36
|
|
|
37 double alpha = 0.0;
|
|
|
38 int level = 0;
|
|
|
39
|
|
|
40 int filter = 0;
|
|
|
41 int method = -1;
|
|
|
42 int levels;
|
|
|
43 char filter_name[MAXPATHLEN] = "";
|
|
|
44
|
|
|
45 int verbose = 0;
|
|
|
46
|
|
|
47 gray **image;
|
|
|
48 Image_tree p, dwts;
|
|
|
49
|
|
|
50 gray maxval;
|
|
8
|
51 int rows, cols, format;
|
|
0
|
52
|
|
|
53 double *watermark;
|
|
|
54
|
|
|
55 progname = argv[0];
|
|
|
56
|
|
|
57 pgm_init(&argc, argv); wm_init();
|
|
|
58
|
|
|
59 while ((c = getopt(argc, argv, "a:e:f:F:h?o:l:s:v:")) != EOF) {
|
|
|
60 switch (c) {
|
|
|
61 case 'a':
|
|
|
62 alpha = atof(optarg);
|
|
|
63 if (alpha <= 0.0) {
|
|
|
64 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha);
|
|
|
65 exit(1);
|
|
|
66 }
|
|
|
67 break;
|
|
|
68 case 'l':
|
|
|
69 level = atoi(optarg);
|
|
|
70 if (level <= 0) {
|
|
|
71 fprintf(stderr, "%s: decomposition level %d out of range\n", progname, level);
|
|
|
72 exit(1);
|
|
|
73 }
|
|
|
74 break;
|
|
|
75 case 'e':
|
|
|
76 method = atoi(optarg);
|
|
|
77 if (method < 0) {
|
|
|
78 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method);
|
|
|
79 exit(1);
|
|
|
80 }
|
|
|
81 break;
|
|
|
82 case 'f':
|
|
|
83 filter = atoi(optarg);
|
|
|
84 if (filter <= 0) {
|
|
|
85 fprintf(stderr, "%s: filter number %d out of range\n", progname, filter);
|
|
|
86 exit(1);
|
|
|
87 }
|
|
|
88 break;
|
|
|
89 case 'F':
|
|
|
90 strcpy(filter_name, optarg);
|
|
|
91 break;
|
|
|
92 case 'h':
|
|
|
93 case '?':
|
|
|
94 usage();
|
|
|
95 break;
|
|
|
96 case 'o':
|
|
|
97 if ((out = fopen(optarg, "wb")) == NULL) {
|
|
|
98 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
|
|
|
99 exit(1);
|
|
|
100 }
|
|
|
101 strcpy(output_name, optarg);
|
|
|
102 break;
|
|
|
103 case 's':
|
|
|
104 if ((sig = fopen(optarg, "r")) == NULL) {
|
|
|
105 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
|
|
|
106 exit(1);
|
|
|
107 }
|
|
|
108 strcpy(signature_name, optarg);
|
|
|
109 break;
|
|
|
110 case 'v':
|
|
|
111 verbose = atoi(optarg);
|
|
|
112 if (verbose < 0) {
|
|
|
113 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose);
|
|
|
114 exit(1);
|
|
|
115 }
|
|
|
116 break;
|
|
|
117 }
|
|
|
118 }
|
|
|
119
|
|
|
120 argc -= optind;
|
|
|
121 argv += optind;
|
|
|
122
|
|
|
123 if (argc > 1) {
|
|
|
124 usage();
|
|
|
125 exit(1);
|
|
|
126 }
|
|
|
127
|
|
8
|
128 if (argc == 1 && *argv[0] != '-') {
|
|
0
|
129 if ((in = fopen(argv[0], "rb")) == NULL) {
|
|
|
130 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
|
|
|
131 exit(1);
|
|
|
132 }
|
|
|
133 else
|
|
|
134 strcpy(input_name, argv[0]);
|
|
8
|
135 }
|
|
|
136
|
|
0
|
137 if (sig) {
|
|
|
138 char line[32];
|
|
|
139 fgets(line, sizeof(line), sig);
|
|
|
140 if (strspn(line, "ZHSG") >= 4) {
|
|
|
141 fscanf(sig, "%d\n", &n);
|
|
|
142 if (alpha == 0.0)
|
|
|
143 fscanf(sig, "%lf\n", &alpha);
|
|
|
144 else
|
|
|
145 fscanf(sig, "%*lf\n");
|
|
|
146 if (level == 0)
|
|
|
147 fscanf(sig, "%d\n", &level);
|
|
|
148 else
|
|
|
149 fscanf(sig, "%*d\n");
|
|
|
150 if (method < 0)
|
|
|
151 fscanf(sig, "%d\n", &method);
|
|
|
152 else
|
|
|
153 fscanf(sig, "%*d\n");
|
|
|
154 if (filter == 0)
|
|
|
155 fscanf(sig, "%d\n", &filter);
|
|
|
156 else
|
|
|
157 fscanf(sig, "%*d\n");
|
|
|
158 if (!strcmp(filter_name, ""))
|
|
|
159 fscanf(sig, "%[^\n\r]\n", &filter_name);
|
|
|
160 else
|
|
|
161 fscanf(sig, "%*[^\n\r]\n");
|
|
|
162 }
|
|
|
163 else {
|
|
|
164 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
|
|
|
165 exit(1);
|
|
|
166 }
|
|
|
167 }
|
|
|
168 else {
|
|
|
169 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname);
|
|
|
170 exit(1);
|
|
|
171 }
|
|
|
172
|
|
|
173 watermark = malloc(n * sizeof(double));
|
|
|
174 for (i = 0; i < n; i++)
|
|
|
175 fscanf(sig, "%lf\n", &watermark[i]);
|
|
|
176 fclose(sig);
|
|
|
177
|
|
|
178 pgm_readpgminit(in, &cols, &rows, &maxval, &format);
|
|
|
179 image = pgm_allocarray(cols, rows);
|
|
|
180 for (row = 0; row < rows; row++)
|
|
|
181 pgm_readpgmrow(in, image[row], cols, maxval, format);
|
|
|
182 fclose(in);
|
|
|
183
|
|
|
184 // complete decomposition
|
|
|
185 levels = find_deepest_level(cols, rows) - 1;
|
|
|
186 if (level > levels) {
|
|
|
187 fprintf(stderr, "%s: decomposition level %d not possible (max. %d), image size is %d x %d\n", progname, level, levels, cols, rows);
|
|
|
188 exit(1);
|
|
|
189 }
|
|
|
190
|
|
|
191 // wavelet transform
|
|
|
192 init_dwt(cols, rows, filter_name, filter, level, method);
|
|
|
193 #ifdef POLLEN_STUFF
|
|
3
|
194 #include "pollen_stuff.c"
|
|
0
|
195 #endif
|
|
|
196 #ifdef PARAM_STUFF
|
|
3
|
197 #include "param_stuff.c"
|
|
0
|
198 #endif
|
|
|
199
|
|
|
200 dwts = fdwt(image);
|
|
|
201
|
|
|
202 p = dwts;
|
|
|
203 while (p->coarse) {
|
|
|
204 double *collected_coeffs, *largest;
|
|
|
205 int subband_size = p->horizontal->image->size;
|
|
|
206 int maxselect = MIN(3 * subband_size, n + 1);
|
|
|
207 double threshold;
|
|
|
208
|
|
|
209 // allocate memory for coefficient vector
|
|
|
210 collected_coeffs = malloc(3 * subband_size * sizeof(double));
|
|
|
211 if (!collected_coeffs) {
|
|
|
212 fprintf(stderr, "%s: malloc() failed\n", progname);
|
|
|
213 exit(1);
|
|
|
214 }
|
|
|
215
|
|
|
216 // collect coefficients from all subbands of one level into one vector
|
|
|
217 for (i = 0; i < subband_size; i++) {
|
|
|
218 collected_coeffs[3 * i + 0] = p->horizontal->image->data[i];
|
|
|
219 collected_coeffs[3 * i + 1] = p->vertical->image->data[i];
|
|
|
220 collected_coeffs[3 * i + 2] = p->diagonal->image->data[i];
|
|
|
221 }
|
|
|
222
|
|
|
223 // allocate memory for largest coefficients
|
|
|
224 largest = malloc(maxselect * sizeof(double));
|
|
|
225 if (!largest) {
|
|
|
226 fprintf(stderr, "%s: malloc() failed\n", progname);
|
|
|
227 exit(1);
|
|
|
228 }
|
|
|
229
|
|
|
230 // select largest coefficients (involves sorting)
|
|
|
231 select_largest_coeffs(collected_coeffs, 3 * subband_size, maxselect, largest);
|
|
|
232 // threshold is the smallest of the largest coefficients
|
|
|
233 threshold = largest[0];
|
|
|
234 free(largest);
|
|
|
235 free(collected_coeffs);
|
|
|
236
|
|
|
237 w = 0;
|
|
|
238 for (i = 0; i < subband_size && w < n; i++) {
|
|
|
239 if (p->horizontal->image->data[i] > threshold)
|
|
|
240 p->horizontal->image->data[i] *= (1.0 + alpha * watermark[w++]);
|
|
|
241 if (p->vertical->image->data[i] > threshold)
|
|
|
242 p->vertical->image->data[i] *= (1.0 + alpha * watermark[w++]);
|
|
|
243 if (p->diagonal->image->data[i] > threshold)
|
|
|
244 p->diagonal->image->data[i] *= (1.0 + alpha * watermark[w++]);
|
|
|
245 }
|
|
|
246
|
|
|
247 p = p->coarse;
|
|
|
248 }
|
|
|
249
|
|
|
250 free(watermark);
|
|
|
251 idwt(dwts, image);
|
|
|
252
|
|
|
253 pgm_writepgminit(out, cols, rows, maxval, 0);
|
|
|
254 for (row = 0; row < rows; row++)
|
|
|
255 pgm_writepgmrow(out, image[row], cols, maxval, 0);
|
|
|
256 fclose(out);
|
|
|
257
|
|
|
258 pgm_freearray(image, rows);
|
|
|
259
|
|
|
260 exit(0);
|
|
|
261 }
|
