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comparison Meerwald/wm_corvi_s.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 ad1d224896c5
comparison
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-1:000000000000 0:be303a3f5ea8
1 #include "wm.h"
2 #include "wm_dwt.h"
3 #include "pgm.h"
4
5 char *progname;
6
7 void usage(void) {
8 fprintf(stderr, "usage: %s [-a n] [-h] [-n n] [-o file] [-q n] [-s file] [-v n] -i file file\n\n", progname);
9 fprintf(stderr, "\t-a n\t\talpha factor\n");
10 fprintf(stderr, "\t-e n\t\twavelet filtering method\n");
11 fprintf(stderr, "\t-f n\t\tfilter number\n");
12 fprintf(stderr, "\t-F file\t\tfilter definition file\n");
13 fprintf(stderr, "\t-h\t\tprint usage\n");
14 fprintf(stderr, "\t-i file\t\toriginal image file\n");
15 fprintf(stderr, "\t-n n\t\twatermark length\n");
16 fprintf(stderr, "\t-o file\t\textracted signature file\n");
17 fprintf(stderr, "\t-q n\t\tquantization/quality factor\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 int main(int argc, char *argv[]) {
24
25 FILE *in = stdin;
26 FILE *out = stdout;
27 FILE *orig = NULL;
28 FILE *sig = NULL;
29
30 gray **input_image;
31 gray **orig_image;
32
33 char signature_name[MAXPATHLEN];
34 char output_name[MAXPATHLEN] = "(stdout)";
35 char input_name[MAXPATHLEN] = "(stdin)";
36 char orig_name[MAXPATHLEN];
37
38 int c;
39 int i;
40 int quantization = 0;
41 int n = 0;
42 int method = -1;
43 int filter = 0;
44 char filter_name[MAXPATHLEN] = "";
45
46 int level;
47 double alpha = 0.0;
48
49 int in_rows, in_cols, in_format;
50 gray in_maxval;
51 int orig_rows, orig_cols, orig_format;
52 gray orig_maxval;
53 int rows, cols;
54 int row, col;
55
56 Image_tree input_dwts;
57 Image_tree orig_dwts;
58
59 int verbose = 0;
60
61 progname = argv[0];
62
63 pgm_init(&argc, argv); wm_init2();
64
65 while ((c = getopt(argc, argv, "a:e:f:F:h?i:n:o:s:v:")) != EOF) {
66 switch (c) {
67 case 'a':
68 alpha = atof(optarg);
69 if (alpha <= 0.0) {
70 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha);
71 exit(1);
72 }
73 break;
74 case 'e':
75 method = atoi(optarg);
76 if (method < 0) {
77 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method);
78 exit(1);
79 }
80 break;
81 case 'f':
82 filter = atoi(optarg);
83 if (filter <= 0) {
84 fprintf(stderr, "%s: filter number %d out of range\n", progname, filter);
85 exit(1);
86 }
87 break;
88 case 'F':
89 strcpy(filter_name, optarg);
90 break;
91 case 'h':
92 case '?':
93 usage();
94 break;
95 case 'i':
96 if ((orig = fopen(optarg, "rb")) == NULL) {
97 fprintf(stderr, "%s: unable to open original image file %s\n", progname, optarg);
98 exit(1);
99 }
100 strcpy(orig_name, optarg);
101 break;
102 case 'n':
103 n = atoi(optarg);
104 if (n < 1 || n > 1000) {
105 fprintf(stderr, "%s: watermark length %d out of range\n", progname, n);
106 exit(1);
107 }
108 break;
109 case 'o':
110 if ((out = fopen(optarg, "w")) == NULL) {
111 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
112 exit(1);
113 }
114 strcpy(output_name, optarg);
115 break;
116 case 's':
117 if ((sig = fopen(optarg, "r")) == NULL) {
118 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
119 exit(1);
120 }
121 strcpy(signature_name, optarg);
122 break;
123 case 'v':
124 verbose = atoi(optarg);
125 if (verbose < 0) {
126 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose);
127 exit(1);
128 }
129 break;
130 }
131 }
132
133 argc -= optind;
134 argv += optind;
135
136 if (argc > 1) {
137 usage();
138 exit(1);
139 }
140
141 if (argc == 1 && *argv[0] != '-')
142 if ((in = fopen(argv[0], "rb")) == NULL) {
143 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
144 exit(1);
145 }
146 else
147 strcpy(input_name, argv[0]);
148
149 if (!orig) {
150 fprintf(stderr, "%s: original image file not specified, use -i file option\n", progname);
151 exit(1);
152 }
153
154 if (sig) {
155 char line[32];
156 fgets(line, sizeof(line), sig);
157 if (strspn(line, "CVSG") >= 4) {
158 fscanf(sig, "%d\n", &n);
159 if (alpha == 0.0)
160 fscanf(sig, "%lf\n", &alpha);
161 else
162 fscanf(sig, "%*lf\n");
163 if (quantization == 0)
164 fscanf(sig, "%d\n", &quantization);
165 else
166 fscanf(sig, "%*d\n");
167 if (method < 0)
168 fscanf(sig, "%d\n", &method);
169 else
170 fscanf(sig, "%*d\n");
171 if (filter == 0)
172 fscanf(sig, "%d\n", &filter);
173 else
174 fscanf(sig, "%*d\n");
175 if (!strcmp(filter_name, ""))
176 fscanf(sig, "%[^\n\r]\n", &filter_name);
177 else
178 fscanf(sig, "%*[^\n\r]\n");
179 }
180 else {
181 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
182 exit(1);
183 }
184 fclose(sig);
185 }
186 else {
187 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname);
188 exit(1);
189 }
190
191 pgm_readpgminit(in, &in_cols, &in_rows, &in_maxval, &in_format);
192 pgm_readpgminit(orig, &orig_cols, &orig_rows, &orig_maxval, &orig_format);
193
194 if (in_cols != orig_cols || in_rows != orig_rows) {
195 fprintf(stderr, "%s: input image %s does not match dimensions of original image %s\n", progname, input_name, orig_name);
196 exit(1);
197 }
198
199 cols = in_cols;
200 rows = in_rows;
201
202 input_image = pgm_allocarray(in_cols, in_rows);
203
204 orig_image = pgm_allocarray(orig_cols, orig_rows);
205
206 for (row = 0; row < in_rows; row++)
207 pgm_readpgmrow(in, input_image[row], in_cols, in_maxval, in_format);
208
209 fclose(in);
210
211 for (row = 0; row < orig_rows; row++)
212 pgm_readpgmrow(orig, orig_image[row], orig_cols, orig_maxval, orig_format);
213
214 fclose(orig);
215
216 level = 0;
217 row = rows;
218 col = cols;
219 while (n < row * col / 4.0 && row >= 2 && col >= 2) {
220 row /= 2;
221 col /= 2;
222 level++;
223 }
224
225 if (verbose >= 2) {
226 fprintf(stderr, "%s: extracting from coarse image (x %d/y %d) at level %d\n", progname, col, row, level);
227 }
228
229 init_dwt(cols, rows, filter_name, filter, level, method);
230 input_dwts = fdwt(input_image);
231 orig_dwts = fdwt(orig_image);
232
233 fprintf(out, "CVSG\n");
234 fprintf(out, "%d\n", n);
235 fprintf(out, "%f\n", alpha);
236 fprintf(out, "%d\n", quantization);
237 fprintf(out, "%d\n", method);
238 fprintf(out, "%d\n", filter);
239 fprintf(out, "%s\n", filter_name);
240
241 {
242 Image_tree p = input_dwts;
243 Image_tree q = orig_dwts;
244 Image input_img;
245 Image orig_img;
246 double input_med;
247 double orig_med;
248
249 while (!p->image)
250 p = p->coarse;
251
252 while (!q->image)
253 q = q->coarse;
254
255 input_img = p->image;
256 orig_img = q->image;
257
258 input_med = 0.0;
259 for (row = 0; row < input_img->height; row++)
260 for (col = 0; col < input_img->width; col++)
261 input_med += get_pixel(input_img, col, row);
262 input_med /= input_img->height * input_img->width;
263
264 orig_med = 0.0;
265 for (row = 0; row < orig_img->height; row++)
266 for (col = 0; col < orig_img->width; col++)
267 orig_med += get_pixel(orig_img, col, row);
268 orig_med /= orig_img->height * orig_img->width;
269
270 row = 0;
271 col = 0;
272 while (n > 0) {
273 Pixel input_pix;
274 Pixel orig_pix;
275 double x;
276
277 input_pix = get_pixel(input_img, col, row);
278 orig_pix = get_pixel(orig_img, col, row);
279
280 x = ((input_pix - orig_pix) / (orig_pix - orig_med)) / alpha;
281
282 fprintf(out, "%f\n", x);
283
284 if (++col == orig_img->width) { col = 0; row++; }
285 n--;
286 }
287 }
288
289 fclose(out);
290
291 pgm_freearray(input_image, rows);
292 pgm_freearray(orig_image, rows);
293
294 exit(0);
295 }

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