annotate Meerwald/wm_kund_e.c @ 4:9cf6ec970448 v0.5

mention filter param.
author Peter Meerwald <pmeerw@cosy.sbg.ac.at>
date Tue, 14 Aug 2007 21:13:11 +0200
parents acb6967ee76d
children ad1d224896c5
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
3
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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1 #include "wm.h"
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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2 #include "signature.h"
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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3 #include "wm_dwt.h"
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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4 #include "pgm.h"
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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5
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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6 char *progname;
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7
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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8 void usage(void) {
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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9 fprintf(stderr, "usage: %s [-e n] [-f n] [-F n] [-h] [-o file] [-q n] [-v n] -s file file\n\n", progname);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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10 fprintf(stderr, "\t-e n\t\twavelet filtering method\n");
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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11 fprintf(stderr, "\t-f n\t\tfilter number\n");
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12 fprintf(stderr, "\t-F file\t\tfilter definition file\n");
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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13 fprintf(stderr, "\t-h\t\tprint usage\n");
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14 fprintf(stderr, "\t-o file\t\toutput (watermarked) file\n");
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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15 fprintf(stderr, "\t-q n\t\tquantization/quality factor\n");
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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16 fprintf(stderr, "\t-s file\t\tsignature to embed in input image\n");
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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17 fprintf(stderr, "\t-v n\t\tverbosity level\n");
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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18 exit(0);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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19 }
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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20
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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21 int main(int argc, char *argv[]) {
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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22
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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23 FILE *in = stdin;
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24 FILE *out = stdout;
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25 FILE *sig = NULL;
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26
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27 char output_name[MAXPATHLEN] = "(stdout)";
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28 char input_name[MAXPATHLEN] = "(stdin)";
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29 char signature_name[MAXPATHLEN];
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30
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31 int c;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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32 int row, col;
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33
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34 int n;
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35
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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36 double quality = 0.0;
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37
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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38 int filter = 0;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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39 int method = -1;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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40 int level = 0;
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41 char filter_name[MAXPATHLEN] = "";
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42
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43 int seed;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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44 int verbose = 0;
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45
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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46 gray **image;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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47 Image_tree dwts;
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48
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49 gray maxval;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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50 int rows, cols, colors, format;
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51
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52 progname = argv[0];
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53
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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54 pgm_init(&argc, argv);
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55
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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56 #ifdef __EMX__
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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57 _fsetmode(in, "b");
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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58 _fsetmode(out, "b");
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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59 #endif
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60
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61 while ((c = getopt(argc, argv, "e:f:F:h?l:o:q:s:v:")) != EOF) {
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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62 switch (c) {
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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63 case 'e':
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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64 method = atoi(optarg);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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65 if (method < 0) {
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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66 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method);
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67 exit(1);
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68 }
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69 break;
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70 case 'f':
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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71 filter = atoi(optarg);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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72 if (filter <= 0) {
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73 fprintf(stderr, "%s: filter number %d out of range\n", progname, filter);
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74 exit(1);
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75 }
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76 break;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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77 case 'F':
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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78 strcpy(filter_name, optarg);
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79 break;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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80 case 'h':
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81 case '?':
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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82 usage();
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83 break;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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84 case 'l':
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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85 level = atoi(optarg);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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86 if (level < 1) {
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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87 fprintf(stderr, "%s: embedding level out of range\n", progname);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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88 exit(1);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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89 }
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90 break;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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91 case 'o':
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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92 if ((out = fopen(optarg, "wb")) == NULL) {
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93 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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94 exit(1);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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95 }
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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96 strcpy(output_name, optarg);
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97 break;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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98 case 'q':
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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99 quality = atoi(optarg);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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100 if (quality <= 0) {
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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101 fprintf(stderr, "%s: quality factor %d out of range\n", progname, quality);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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102 exit(1);
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103 }
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104 break;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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105 case 's':
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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106 if ((sig = fopen(optarg, "r")) == NULL) {
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107 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
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108 exit(1);
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109 }
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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110 strcpy(signature_name, optarg);
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111 break;
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112 case 'v':
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113 verbose = atoi(optarg);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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114 if (verbose < 0) {
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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115 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose);
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116 exit(1);
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117 }
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118 break;
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119 }
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120 }
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121
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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122 argc -= optind;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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123 argv += optind;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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124
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125 if (argc > 1) {
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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126 usage();
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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127 exit(1);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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128 }
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129
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130 if (argc == 1 && *argv[0] != '-')
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131 if ((in = fopen(argv[0], "rb")) == NULL) {
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132 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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133 exit(1);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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134 }
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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135 else
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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136 strcpy(input_name, argv[0]);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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137
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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138 if (sig) {
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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139 char line[32];
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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140 fgets(line, sizeof(line), sig);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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141 if (strspn(line, "KDSG") >= 4) {
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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142 fscanf(sig, "%d\n", &n);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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143 if (quality == 0.0)
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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144 fscanf(sig, "%lf\n", &quality);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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145 else
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
146 fscanf(sig, "%*lf\n");
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
147 if (method < 0)
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
148 fscanf(sig, "%d\n", &method);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
149 else
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
150 fscanf(sig, "%*d\n");
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
151 if (filter == 0)
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
152 fscanf(sig, "%d\n", &filter);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
153 else
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
154 fscanf(sig, "%*d\n");
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
155 if (!strcmp(filter_name, ""))
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
156 fscanf(sig, "%[^\n\r]\n", &filter_name);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
157 else
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
158 fscanf(sig, "%*[^\n\r]\n");
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
159 if (level == 0)
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
160 fscanf(sig, "%d\n", &level);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
161 else
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
162 fscanf(sig, "%*d\n");
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
163 fscanf(sig, "%d\n", &seed);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
164 srandom(seed);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
165 n_signature = NBITSTOBYTES(nbit_signature);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
166 fread(signature, sizeof(char), n_signature, sig);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
167 fscanf(sig, "\n");
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
168 }
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
169 else {
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
170 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
171 exit(1);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
172 }
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
173 fclose(sig);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
174 }
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
175 else {
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
176 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
177 exit(1);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
178 }
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
179
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
180 pgm_readpgminit(in, &cols, &rows, &maxval, &format);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
181
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
182 image = pgm_allocarray(cols, rows);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
183
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
184 for (row = 0; row < rows; row++)
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
185 pgm_readpgmrow(in, image[row], cols, maxval, format);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
186
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
187 fclose(in);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
188
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
189 // check watermark dimensions and decomposition level
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
190
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
191
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
192 // decomposition of image
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
193 init_dwt(cols, rows, filter_name, filter, level, method);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
194 #ifdef POLLEN_STUFF
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
195 {
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
196 double alpha, beta;
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
197 char *alpha_str = getenv("POLLEN_ALPHA"), *beta_str = getenv("POLLEN_BETA");
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
198
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
199 if (alpha_str && beta_str) {
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
200 alpha = atof(alpha_str);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
201 beta = atof(beta_str);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
202
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
203 if (alpha < -M_PI || alpha >= M_PI) {
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
204 fprintf(stderr, "%s: pollen - alpha %f out of range\n", progname, alpha);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
205 exit(1);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
206 }
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
207
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
208 if (beta < -M_PI || beta >= M_PI) {
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
209 fprintf(stderr, "%s: pollen - beta %f out of range\n", progname, beta);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
210 exit(1);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
211 }
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
212
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
213 if (verbose > 7)
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
214 fprintf(stderr, "%s: pollen - alpha %f, beta %f\n", progname, alpha, beta);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
215
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
216 dwt_pollen_filter(alpha, beta);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
217 }
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
218 }
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
219 #endif
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
220
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
221 dwts = fdwt(image);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
222
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
223 // create 'image' from binary watermark
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
224
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
225 // decomposition of watermark
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
226 init_dwt(cols, rows, filter_name, filter, 1, method);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
227 // dwts = fdwt(watermark);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
228
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
229 // calculate mean value of image and set alpha
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
230
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
231 // setup of contrast sensitivity matrix
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
232
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
233 // segment detail images at each level
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
234
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
235 // calculate DFT of each segment
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
236
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
237 // compute salience for each segment
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
238
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
239 // calculate gamma or each detail image
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
240
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
241 // embed watermark
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
242
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
243 // reconstruction of watermarked image
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
244
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
245 idwt(dwts, image);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
246
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
247 pgm_writepgminit(out, cols, rows, maxval, 0);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
248
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
249 for (row = 0; row < rows; row++)
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
250 pgm_writepgmrow(out, image[row], cols, maxval, 0);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
251
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
252 fclose(out);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
253
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
254 pgm_freearray(image, rows);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
255
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
256 exit(0);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
257 }

Repositories maintained by Peter Meerwald, pmeerw@pmeerw.net.