wm: Meerwald/wm_wang_e.c comparison

comparison Meerwald/wm_wang_e.c @ 0:be303a3f5ea8

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
+:be303a3f5ea8
+#include "wm.h"
+#include "dwt.h"
+#include "wang_common.h"
+#include "dwt_util.h"
+#include "pgm.h"
+char *progname;
+void usage(void) {
+fprintf(stderr, "usage: %s [-a n] [-b n] [-e n] [-f n] [-F n] [-h] [-o file] [-v n] -s file file\n\n", progname);
+fprintf(stderr, "\t-a n\t\talpha factor/embedding strength\n");
+fprintf(stderr, "\t-b n\t\tsubband weighting factor\n");
+fprintf(stderr, "\t-e n\t\twavelet filtering method\n");
+fprintf(stderr, "\t-f n\t\tfilter number\n");
+fprintf(stderr, "\t-F file\t\tfilter definition file\n");
+fprintf(stderr, "\t-h\t\tprint usage\n");
+fprintf(stderr, "\t-o file\t\toutput (watermarked) file\n");
+fprintf(stderr, "\t-s file\t\tsignature to embed in input image\n");
+fprintf(stderr, "\t-v n\t\tverbosity level\n");
+exit(0);
+}
+int main(int argc, char *argv[]) {
+FILE *in = stdin;
+FILE *out = stdout;
+FILE *sig = NULL;
+char output_name[MAXPATHLEN] = "(stdout)";
+char input_name[MAXPATHLEN] = "(stdin)";
+char signature_name[MAXPATHLEN];
+int i, c, w;
+int row, col;
+int n;
+double alpha = 0.0;
+double beta = 0.0;
+int filter = 0;
+int method = -1;
+int levels;
+char filter_name[MAXPATHLEN] = "";
+int verbose = 0;
+gray **image;
+Image_tree dwts;
+gray maxval;
+int rows, cols, colors, format;
+double *watermark;
+progname = argv[0];
+pgm_init(&argc, argv); wm_init();
+while ((c = getopt(argc, argv, "a:b:e:f:F:h?o:s:v:")) != EOF) {
+switch (c) {
+case 'a':
+alpha = atof(optarg);
+if (alpha <= 0.0) {
+fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha);
+exit(1);
+}
+break;
+case 'b':
+beta = atof(optarg);
+if (beta <= 0.0) {
+fprintf(stderr, "%s: beta factor %f out of range\n", progname, beta);
+exit(1);
+}
+break;
+case 'e':
+method = atoi(optarg);
+if (method < 0) {
+fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method);
+exit(1);
+}
+break;
+case 'f':
+filter = atoi(optarg);
+if (filter <= 0) {
+fprintf(stderr, "%s: filter number %d out of range\n", progname, filter);
+exit(1);
+}
+break;
+case 'F':
+strcpy(filter_name, optarg);
+break;
+case 'h':
+case '?':
+usage();
+break;
+case 'o':
+if ((out = fopen(optarg, "wb")) == NULL) {
+fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
+exit(1);
+}
+strcpy(output_name, optarg);
+break;
+case 's':
+if ((sig = fopen(optarg, "r")) == NULL) {
+fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
+exit(1);
+}
+strcpy(signature_name, optarg);
+break;
+case 'v':
+verbose = atoi(optarg);
+if (verbose < 0) {
+fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose);
+exit(1);
+}
+break;
+}
+}
+argc -= optind;
+argv += optind;
+if (argc > 1) {
+usage();
+exit(1);
+}
+if (argc == 1 && *argv[0] != '-')
+if ((in = fopen(argv[0], "rb")) == NULL) {
+fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
+exit(1);
+}
+else
+strcpy(input_name, argv[0]);
+if (sig) {
+char line[32];
+fgets(line, sizeof(line), sig);
+if (strspn(line, "WGSG") >= 4) {
+fscanf(sig, "%d\n", &n);
+if (alpha == 0.0)
+fscanf(sig, "%lf\n", &alpha);
+else
+fscanf(sig, "%*lf\n");
+if (beta == 0.0)
+fscanf(sig, "%lf\n", &beta);
+else
+fscanf(sig, "%*lf\n");
+if (method < 0)
+fscanf(sig, "%d\n", &method);
+else
+fscanf(sig, "%*d\n");
+if (filter == 0)
+fscanf(sig, "%d\n", &filter);
+else
+fscanf(sig, "%*d\n");
+if (!strcmp(filter_name, ""))
+fscanf(sig, "%[^\n\r]\n", &filter_name);
+else
+fscanf(sig, "%*[^\n\r]\n");
+}
+else {
+fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
+exit(1);
+}
+}
+else {
+fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname);
+exit(1);
+}
+watermark = malloc(n * sizeof(double));
+for (i = 0; i < n; i++)
+fscanf(sig, "%lf\n", &watermark[i]);
+fclose(sig);
+pgm_readpgminit(in, &cols, &rows, &maxval, &format);
+image = pgm_allocarray(cols, rows);
+for (row = 0; row < rows; row++)
+pgm_readpgmrow(in, image[row], cols, maxval, format);
+fclose(in);
+// complete decomposition
+levels = find_deepest_level(cols, rows) - 1;
+// wavelet transform
+init_dwt(cols, rows, filter_name, filter, levels, method);
+#ifdef POLLEN_STUFF
+#include "pollen_stuff.xxx"
+#endif
+#ifdef PARAM_STUFF
+#include "param_stuff.xxx"
+#endif
+dwts = fdwt(image);
+// build tree for subband selection, calculate subband thresholds
+init_subbands(dwts);
+set_subbands_type_beta(HORIZONTAL, beta);
+set_subbands_type_beta(VERTICAL, beta);
+calc_subbands_threshold();
+w = 0;
+while (w < n) {
+Subband_data s;
+// select subband with max. threshold
+s = select_subband();
+if (verbose > 1)
+fprintf(stderr, "%s: selected subband %s%d, T=%lf, beta=%lf\n", progname, subband_name(s->type), s->level, s->T, s->beta);
+// watermark significant coefficients and set them selected
+// check is entire signature has been embedded
+c = select_subband_coeff(s);
+do {
+double p;
+if (c < 0)
+// no more significant coefficients in subband
+break;
+p = get_subband_coeff(s, c);
+if (p < s->Cmax) {
+if (verbose > 2)
+fprintf(stderr, "%s: embedding sig. coeff. #%d (= %lf)\n  into %s%d coeff. #%d\n",
+progname, w, watermark[w], subband_name(s->type), s->level, c);
+p = p + alpha * s->beta * s->T * watermark[w];
+set_subband_coeff(s, c, p);
+w++;
+}
+mark_subband_coeff(s, c);
+// select next significant coefficient
+c = select_subband_coeff_from(s, c);
+} while (w < n);
+// update subband threshold
+s->T /= 2.0;
+}
+free_subbands();
+free(watermark);
+idwt(dwts, image);
+pgm_writepgminit(out, cols, rows, maxval, 0);
+for (row = 0; row < rows; row++)
+pgm_writepgmrow(out, image[row], cols, maxval, 0);
+fclose(out);
+pgm_freearray(image, rows);
+exit(0);
+}

Mercurial > hg > wm

comparison Meerwald/wm_wang_e.c @ 0:be303a3f5ea8