annotate Meerwald/wm_dugad_e.c @ 20:bd669312f068

suppress warnings, fix link errors
author Peter Meerwald-Stadler <pmeerw@pmeerw.net>
date Sat, 28 Jan 2023 23:54:58 +0100
parents 4987db85cfae
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
1 #include "wm.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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2 #include "dwt.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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3 #include "pgm.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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4
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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5 char *progname;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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6
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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7 void usage(void) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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8 fprintf(stderr, "usage: %s [-a n] [-e n] [-f n] [-F file] [-h] [-l n] [-o file] [-t n] [-v n] -s file file\n\n", progname);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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9 fprintf(stderr, "\t-a n\t\talpha factor/embedding strength\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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10 fprintf(stderr, "\t-e n\t\twavelet filtering method\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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11 fprintf(stderr, "\t-f n\t\tfilter number\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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12 fprintf(stderr, "\t-F file\t\tfilter definition file\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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13 fprintf(stderr, "\t-h\t\tprint usage\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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14 fprintf(stderr, "\t-l n\t\tdecomposition levels\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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15 fprintf(stderr, "\t-o file\t\toutput (watermarked) file\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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16 fprintf(stderr, "\t-s file\t\tsignature to embed in input image\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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17 fprintf(stderr, "\t-t n\t\tcasting threshold\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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18 fprintf(stderr, "\t-v n\t\tverbosity level\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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19 exit(0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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20 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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21
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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22 // actual watermarking procedure: embeds a watermark of n normally
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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23 // distributed values into a coefficients > threshold t1 of a subband
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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24 void wm_subband(Image s, double *w, int n, double a, double t1) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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25 int i;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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26
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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27 for (i = 0; i < s->width * s->height; i++)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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28 if (fabs(s->data[i]) > t1)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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29 s->data[i] += (a * fabs(s->data[i]) * w[i % n]);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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30 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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31
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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32 int main(int argc, char *argv[]) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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33
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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34 FILE *in = stdin;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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35 FILE *out = stdout;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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36 FILE *sig = NULL;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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37
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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38 char output_name[MAXPATHLEN] = "(stdout)";
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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39 char input_name[MAXPATHLEN] = "(stdin)";
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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40 char signature_name[MAXPATHLEN];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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41
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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42 int i, c;
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f83ef905a63d fixing many warnings
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 3
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43 int row;
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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44
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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45 int n;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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46
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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47 double alpha = 0.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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48 double t1 = 0.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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49
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parents: 0
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50 int level = 0;
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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51 int filter = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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52 int method = -1;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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53 char filter_name[MAXPATHLEN] = "";
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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54
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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55 int verbose = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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56
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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57 gray **image;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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58 Image_tree dwts, s;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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59
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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60 gray maxval;
8
f83ef905a63d fixing many warnings
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 3
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61 int rows, cols, format;
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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62
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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63 double *watermark;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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64
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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65 progname = argv[0];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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66
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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67 pgm_init(&argc, argv); wm_init();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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68
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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69 while ((c = getopt(argc, argv, "a:e:f:F:h?l:o:s:t:v:")) != EOF) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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70 switch (c) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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71 case 'a':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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72 alpha = atof(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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73 if (alpha <= 0.0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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74 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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75 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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76 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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77 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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78 case 'e':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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79 method = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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80 if (method < 0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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81 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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82 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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83 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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84 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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85 case 'f':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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86 filter = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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87 if (filter <= 0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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88 fprintf(stderr, "%s: filter number %d out of range\n", progname, filter);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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89 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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90 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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91 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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92 case 'F':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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93 strcpy(filter_name, optarg);
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parents:
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94 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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95 case 'h':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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96 case '?':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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97 usage();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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98 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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99 case 'l':
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acb6967ee76d update to 0.5
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parents: 0
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100 level = atoi(optarg);
acb6967ee76d update to 0.5
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parents: 0
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101 if (level <= 0) {
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f83ef905a63d fixing many warnings
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parents: 3
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102 fprintf(stderr, "%s: decomposition level %d out of range\n", progname, level);
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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103 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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104 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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105 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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106 case 'o':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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107 if ((out = fopen(optarg, "wb")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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108 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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109 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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110 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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111 strcpy(output_name, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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112 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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113 case 's':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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114 if ((sig = fopen(optarg, "r")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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115 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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116 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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117 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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118 strcpy(signature_name, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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119 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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120 case 't':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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121 t1 = atof(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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122 if (t1 <= 0.0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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123 fprintf(stderr, "%s: casting threshold %f out of range\n", progname, t1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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124 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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125 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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126 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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127 case 'v':
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parents:
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128 verbose = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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129 if (verbose < 0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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130 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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131 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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132 }
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parents:
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133 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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134 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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135 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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136
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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137 argc -= optind;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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138 argv += optind;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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139
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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140 if (argc > 1) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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141 usage();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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142 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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143 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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144
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f83ef905a63d fixing many warnings
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145 if (argc == 1 && *argv[0] != '-') {
0
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parents:
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146 if ((in = fopen(argv[0], "rb")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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147 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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148 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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149 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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150 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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151 strcpy(input_name, argv[0]);
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f83ef905a63d fixing many warnings
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parents: 3
diff changeset
152 }
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parents: 3
diff changeset
153
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
154 if (sig) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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155 char line[32];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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156 fgets(line, sizeof(line), sig);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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157 if (strspn(line, "DGSG") >= 4) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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158 fscanf(sig, "%d\n", &n);
3
acb6967ee76d update to 0.5
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parents: 0
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159 if (level == 0)
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 0
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160 fscanf(sig, "%d\n", &level);
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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161 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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162 fscanf(sig, "%*d\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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163 if (alpha == 0.0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
164 fscanf(sig, "%lf\n", &alpha);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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165 else
16
4987db85cfae fix another scanf() warning
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 15
diff changeset
166 fscanf(sig, "%*f\n");
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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167 if (t1 == 0.0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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168 fscanf(sig, "%lf\n", &t1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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169 else
16
4987db85cfae fix another scanf() warning
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parents: 15
diff changeset
170 fscanf(sig, "%*f\n");
4987db85cfae fix another scanf() warning
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 15
diff changeset
171 fscanf(sig, "%*f\n");
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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172 if (method < 0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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173 fscanf(sig, "%d\n", &method);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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174 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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175 fscanf(sig, "%*d\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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176 if (filter == 0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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177 fscanf(sig, "%d\n", &filter);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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178 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
179 fscanf(sig, "%*d\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
180 if (!strcmp(filter_name, ""))
15
ad1d224896c5 fix scanf() warning
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 8
diff changeset
181 fscanf(sig, "%[^\n\r]\n", filter_name);
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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182 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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183 fscanf(sig, "%*[^\n\r]\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
184 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
185 else {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
186 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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187 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
188 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
189 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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190 else {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
191 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
192 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
193 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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194
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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195 watermark = malloc(n * sizeof(double));
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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196 for (i = 0; i < n; i++)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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197 fscanf(sig, "%lf\n", &watermark[i]);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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198 fclose(sig);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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199
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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200 pgm_readpgminit(in, &cols, &rows, &maxval, &format);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
201
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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202 image = pgm_allocarray(cols, rows);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
203
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
204 for (row = 0; row < rows; row++)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
205 pgm_readpgmrow(in, image[row], cols, maxval, format);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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206
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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207 fclose(in);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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208
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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209 // wavelet transform
3
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 0
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210 init_dwt(cols, rows, filter_name, filter, level, method);
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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211 #ifdef POLLEN_STUFF
3
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 0
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212 #include "pollen_stuff.c"
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
213 #endif
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
214 #ifdef PARAM_STUFF
3
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 0
diff changeset
215 #include "param_stuff.c"
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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216 #endif
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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217
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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218 dwts = fdwt(image);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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219
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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220 // embed watermark in all subbands of a decomposition level
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
221 for (i = 0, s = dwts; i < 3; i++, s = s->coarse) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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222 wm_subband(s->horizontal->image, watermark, n, alpha, t1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
223 wm_subband(s->vertical->image, watermark, n, alpha, t1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
224 wm_subband(s->diagonal->image, watermark, n, alpha, t1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
225 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
226
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
227 free(watermark);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
228
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
229 idwt(dwts, image);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
230
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
231 pgm_writepgminit(out, cols, rows, maxval, 0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
232
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
233 for (row = 0; row < rows; row++)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
234 pgm_writepgmrow(out, image[row], cols, maxval, 0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
235
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
236 fclose(out);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
237
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
238 pgm_freearray(image, rows);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
239
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
240 exit(0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
241 }

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