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comparison Meerwald/wm_xia_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
equal deleted inserted replaced
-1:000000000000 0:be303a3f5ea8
1 #include "wm.h"
2 #include "dwt.h"
3 #include "pgm.h"
4 #include "dwt_util.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 void mark_subband(Image_tree s, int name, double alpha, double watermark[], int n, int verbose) {
23 int i, j;
24 int w;
25
26 w = 0;
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) > 20.0) {
33 newcoeff = coeff + alpha * pow(fabs(coeff), 1.2) * watermark[w++ % n];
34 set_pixel(s->image, i, j, newcoeff);
35 }
36 }
37
38 if (verbose > 3)
39 fprintf(stderr, "%s: watermarking %s%d, size %d x %d; embedded %d coeffs.\n",
40 progname, subband_name(name), s->level, s->image->width, s->image->height, w);
41 }
42
43 int main(int argc, char *argv[]) {
44
45 FILE *in = stdin;
46 FILE *out = stdout;
47 FILE *sig = NULL;
48
49 char output_name[MAXPATHLEN] = "(stdout)";
50 char input_name[MAXPATHLEN] = "(stdin)";
51 char signature_name[MAXPATHLEN];
52
53 int i, c, w;
54 int row, col;
55
56 int n;
57
58 double alpha = 0.0;
59 int level = 0;
60
61 int filter = 0;
62 int method = -1;
63 int levels;
64 char filter_name[MAXPATHLEN] = "";
65
66 int verbose = 0;
67
68 gray **image;
69 Image_tree p, dwts;
70
71 gray maxval;
72 int rows, cols, colors, format;
73
74 double *watermark;
75
76 progname = argv[0];
77
78 pgm_init(&argc, argv); wm_init();
79
80 while ((c = getopt(argc, argv, "a:e:f:F:h?o:l:s:v:")) != EOF) {
81 switch (c) {
82 case 'a':
83 alpha = atof(optarg);
84 if (alpha <= 0.0) {
85 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha);
86 exit(1);
87 }
88 break;
89 case 'l':
90 level = atoi(optarg);
91 if (level <= 0) {
92 fprintf(stderr, "%s: decomposition level %d out of range\n", progname, level);
93 exit(1);
94 }
95 break;
96 case 'e':
97 method = atoi(optarg);
98 if (method < 0) {
99 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method);
100 exit(1);
101 }
102 break;
103 case 'f':
104 filter = atoi(optarg);
105 if (filter <= 0) {
106 fprintf(stderr, "%s: filter number %d out of range\n", progname, filter);
107 exit(1);
108 }
109 break;
110 case 'F':
111 strcpy(filter_name, optarg);
112 break;
113 case 'h':
114 case '?':
115 usage();
116 break;
117 case 'o':
118 if ((out = fopen(optarg, "wb")) == 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 (sig) {
158 char line[32];
159 fgets(line, sizeof(line), sig);
160 if (strspn(line, "XASG") >= 4) {
161 fscanf(sig, "%d\n", &n);
162 if (alpha == 0.0)
163 fscanf(sig, "%lf\n", &alpha);
164 else
165 fscanf(sig, "%*lf\n");
166 if (level == 0)
167 fscanf(sig, "%d\n", &level);
168 else
169 fscanf(sig, "%*d\n");
170 if (method < 0)
171 fscanf(sig, "%d\n", &method);
172 else
173 fscanf(sig, "%*d\n");
174 if (filter == 0)
175 fscanf(sig, "%d\n", &filter);
176 else
177 fscanf(sig, "%*d\n");
178 if (!strcmp(filter_name, ""))
179 fscanf(sig, "%[^\n\r]\n", &filter_name);
180 else
181 fscanf(sig, "%*[^\n\r]\n");
182 }
183 else {
184 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
185 exit(1);
186 }
187 }
188 else {
189 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname);
190 exit(1);
191 }
192
193 watermark = malloc(n * sizeof(double));
194 for (i = 0; i < n; i++)
195 fscanf(sig, "%lf\n", &watermark[i]);
196 fclose(sig);
197
198 pgm_readpgminit(in, &cols, &rows, &maxval, &format);
199 image = pgm_allocarray(cols, rows);
200 for (row = 0; row < rows; row++)
201 pgm_readpgmrow(in, image[row], cols, maxval, format);
202 fclose(in);
203
204 // complete decomposition
205 levels = find_deepest_level(cols, rows) - 1;
206 if (level > levels) {
207 fprintf(stderr, "%s: decomposition level %d not possible (max. %d), image size is %d x %d\n", progname, level, levels, cols, rows);
208 exit(1);
209 }
210
211 // wavelet transform
212 init_dwt(cols, rows, filter_name, filter, level, method);
213 #ifdef POLLEN_STUFF
214 #include "pollen_stuff.xxx"
215 #endif
216 #ifdef PARAM_STUFF
217 #include "param_stuff.xxx"
218 #endif
219
220 dwts = fdwt(image);
221
222 p = dwts;
223 while (p->coarse) {
224
225 mark_subband(p->horizontal, HORIZONTAL, alpha, watermark, n, verbose);
226 mark_subband(p->vertical, VERTICAL, alpha, watermark, n, verbose);
227 mark_subband(p->diagonal, DIAGONAL, alpha, watermark, n, verbose);
228
229 p = p->coarse;
230 }
231
232 free(watermark);
233 idwt(dwts, image);
234
235 pgm_writepgminit(out, cols, rows, maxval, 0);
236 for (row = 0; row < rows; row++)
237 pgm_writepgmrow(out, image[row], cols, maxval, 0);
238 fclose(out);
239
240 pgm_freearray(image, rows);
241
242 exit(0);
243 }

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