annotate Meerwald/wm_bruyn_e.c @ 8:f83ef905a63d

fixing many warnings increase capacity for coordinates in bruyn fix some uninit. variables
author Peter Meerwald <pmeerw@cosy.sbg.ac.at>
date Tue, 22 Apr 2008 13:36:05 +0200
parents be303a3f5ea8
children 4987db85cfae
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 "signature.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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3 #include "coord.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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4 #include "gray.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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5 #include "sort.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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6 #include "bruyn_common.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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7 #include "pgm.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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8
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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9 char *progname;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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10
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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11 // prints out program's parameters
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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12 void usage(void) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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13 fprintf(stderr, "usage: %s [-b n] [-h] [-k] [-n n] [-o file] [-pP n] [-q n] [-tT n] [-v n] -s file file\n", progname);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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14 fprintf(stderr, "\t-b n\t\tblock size\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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15 fprintf(stderr, "\t-h\t\tprint usage\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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16 fprintf(stderr, "\t-k\t\tdisable block skipping\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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17 fprintf(stderr, "\t-n n\t\tnumber of signature bits to embed\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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18 fprintf(stderr, "\t-o file\t\toutput (watermarked) file\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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19 fprintf(stderr, "\t-p n\t\tpattern type for zone 1\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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20 fprintf(stderr, "\t-P n\t\tpattern type for zone 2\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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21 fprintf(stderr, "\t-q n\t\tsignature strength\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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22 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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23 fprintf(stderr, "\t-t n\t\tthreshold for noise\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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24 fprintf(stderr, "\t-T n\t\tthreshold for slope\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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25 fprintf(stderr, "\t-v n\t\tverbosity level\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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26 exit(0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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27 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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28
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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29 int main(int argc, char *argv[]) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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30 FILE *in = stdin;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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31 FILE *out = stdout;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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32 FILE *sig = NULL;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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33
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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34 gray** image;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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35 gray **block;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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36 gray **zone;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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37 gray **category1, **category2;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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38 gray maxval;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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39 double *slope;
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f83ef905a63d fixing many warnings
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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40 int rows, cols, format;
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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41 int c;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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42 int i, j;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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43 int n;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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44 int col, row;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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45 int n_block;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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46 int skipping = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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47
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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48 char signature_name[MAXPATHLEN];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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49 char input_name[MAXPATHLEN] = "(stdin)";
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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50 char output_name[MAXPATHLEN] = "(stdout)";
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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51
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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52 double quality = 0.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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53 double threshold_noise = 0.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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54 double threshold_slope = 0.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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55 int pattern1 = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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56 int pattern2 = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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57 int blocksize = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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58 int seed;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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59
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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60 int verbose = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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61
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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62 struct coords *coords;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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63
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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64 progname = argv[0];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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65
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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66 pgm_init(&argc, argv); wm_init();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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67
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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68 // parse command line and set options
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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69 while ((c = getopt(argc, argv, "b:h?n:o:p:P:q:s:t:T:v:k")) != EOF) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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70 switch (c) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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71 case 'k':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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72 skipping = 1;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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73 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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74 case 'h':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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75 case '?':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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76 usage();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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77 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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78 case 'n':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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79 nbit_signature = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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80 if (nbit_signature <= 0 || nbit_signature > NBITSIGNATURE) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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81 fprintf(stderr, "%s: invalid signature length %d\n", progname, nbit_signature);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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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>
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84 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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85 case 'o':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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86 if ((out = fopen(optarg, "wb")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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87 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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88 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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89 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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90 strcpy(output_name, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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91 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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92 case 'p':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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93 pattern1 = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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94 if (pattern1 <= 0 || pattern1 > NPATTERN) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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95 fprintf(stderr, "%s: pattern type out of range\n", progname);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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96 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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97 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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98 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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99 case 'P':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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100 pattern2 = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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101 if (pattern2 <= 0 || pattern2 > 3) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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102 fprintf(stderr, "%s: pattern type out of range\n", progname);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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103 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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104 }
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105 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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106 case 'q':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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107 quality = atof(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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108 if (quality <= 0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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109 fprintf(stderr, "%s: quality factor %f out of range\n", progname, quality);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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110 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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111 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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112 case 's':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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113 if ((sig = fopen(optarg, "r")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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114 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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115 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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116 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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117 strcpy(signature_name, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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118 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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119 case 't':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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120 threshold_noise = atof(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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121 if (threshold_noise <= 0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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122 fprintf(stderr, "%s: noise threshold %f out of range\n", progname, threshold_noise);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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123 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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124 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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125 case 'T':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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126 threshold_slope = atof(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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127 if (threshold_slope <= 0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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128 fprintf(stderr, "%s: slope threshold %f out of range\n", progname, threshold_slope);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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129 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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130 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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131 case 'v':
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132 verbose = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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133 if (verbose < 0) {
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134 fprintf(stderr, "%s: verbosity level %d out of range\n",progname, verbose);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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135 exit(1);
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 break;
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138 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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139 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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140
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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141 argc -= optind;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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142 argv += optind;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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143
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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144 if (argc > 1) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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145 usage();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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146 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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147 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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148
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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149 // open input image file or read from stdin
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f83ef905a63d fixing many warnings
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150 if (argc == 1 && *argv[0] != '-') {
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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151 if ((in = fopen(argv[0], "rb")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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152 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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153 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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154 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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155 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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156 strcpy(input_name, argv[0]);
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f83ef905a63d fixing many warnings
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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157 }
f83ef905a63d fixing many warnings
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158
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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159 // read signature file and set options
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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160 // command line options override signature file options
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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161 if (sig) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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162 char line[128];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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163 fgets(line, sizeof(line), sig);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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164 if (strspn(line, "BRSG") >= 4) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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165 if (nbit_signature == 0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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166 fscanf(sig, "%d\n", &nbit_signature);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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167 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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168 fscanf(sig, "%*d\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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169 if (skipping == 0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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170 fscanf(sig, "%d\n", &skipping);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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171 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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172 fscanf(sig, "%*d\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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173 if (pattern1 == 0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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174 fscanf(sig, "%d\n", &pattern1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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175 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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176 fscanf(sig, "%*d\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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177 if (pattern2 == 0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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178 fscanf(sig, "%d\n", &pattern2);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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179 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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180 fscanf(sig, "%*d\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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181 if (quality == 0.0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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182 fscanf(sig, "%lf\n", &quality);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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183 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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184 fscanf(sig, "%*lf\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
185 if (threshold_noise == 0.0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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186 fscanf(sig, "%lf\n", &threshold_noise);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
187 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
188 fscanf(sig, "%*lf\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
189 if (threshold_slope == 0.0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
190 fscanf(sig, "%lf\n", &threshold_slope);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
191 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
192 fscanf(sig, "%*lf\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
193 if (blocksize == 0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
194 fscanf(sig, "%d\n", &blocksize);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
195 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
196 fscanf(sig, "%*d\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
197 fscanf(sig, "%d\n", &seed);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
198 srandom(seed);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
199 n_signature = NBITSTOBYTES(nbit_signature);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
200 fread(signature, sizeof(char), n_signature, sig);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
201 fscanf(sig, "\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
202 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
203 else {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
204 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
205 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
206 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
207 fclose(sig);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
208 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
209 else {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
210 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
211 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
212 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
213
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
214 if (pattern1 <= 0 || pattern2 <= 0 || pattern1 > NPATTERN || pattern2 > NPATTERN) {
8
f83ef905a63d fixing many warnings
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 0
diff changeset
215 fprintf(stderr, "%s: invalid pattern type specified\n", progname);
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
216 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
217 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
218
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
219 // read dimensions of input image file
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
220 pgm_readpgminit(in, &cols, &rows, &maxval, &format);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
221
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
222 // see if we can embed all signature bits
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
223 // we want at least half of the blocks untouched
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
224 if (((rows / blocksize) * (cols / blocksize)) < nbit_signature / 2) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
225 fprintf(stderr, "%s: image not large enough to embed %d bits of signature\n", progname, nbit_signature);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
226 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
227 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
228 n_block = blocksize * blocksize;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
229
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
230 // allocate structure to remember which blocks we already touched,
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
231 // allow plenty of room to skip over blocks
8
f83ef905a63d fixing many warnings
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 0
diff changeset
232 if ((coords = alloc_coords(nbit_signature * 16)) == NULL) {
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
233 fprintf(stderr, "%s: unable to allocate memory\n", progname);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
234 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
235 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
236
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
237 // read in input image file
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
238 image = pgm_allocarray(cols, rows);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
239 for (row = 0; row < rows; row++)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
240 pgm_readpgmrow(in, image[row], cols, maxval, format);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
241
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
242 fclose(in);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
243
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
244 row = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
245 col = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
246
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
247 // allocate memory for one block
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
248 block = alloc_grays(blocksize, blocksize);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
249
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
250 // allocate memory for zone classification
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
251 zone = alloc_grays(blocksize, blocksize);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
252
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
253 // allocate memory for category classification
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
254 category1 = alloc_grays(blocksize, blocksize);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
255 category2 = alloc_grays(blocksize, blocksize);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
256
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
257 // set up category classification array according to
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
258 // pattern type parameter
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
259 for (i = 0; i < blocksize; i++)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
260 for (j = 0; j < blocksize; j++) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
261 category1[j][i] = lookup_pattern(pattern1, i, j);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
262 category2[j][i] = lookup_pattern(pattern2, i, j);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
263 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
264
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
265 // allocate memory for slope calculation
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
266 slope = malloc(sizeof(double) * n_block);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
267
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
268 // embed all the signature bits, one by one
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
269 n = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
270 while (n < nbit_signature) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
271 int xb;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
272 int yb;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
273 int blocktype;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
274 double smax;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
275 int alpha, beta_minus, beta_plus;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
276 double mean_1A, mean_1B, mean_2A, mean_2B, mean_1, mean_2;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
277 double mean__1A, mean__1B, mean__2A, mean__2B;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
278 int n_1A, n_1B, n_2A, n_2B, n_1, n_2;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
279 int var_1A, var_1B, var_2A, var_2B;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
280 int zone1_ok, zone2_ok;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
281
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
282 // find an unused block randomly, depending on seed
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
283 do {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
284 xb = random() % (cols / blocksize);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
285 yb = random() % (rows / blocksize);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
286 } while (add_coord(coords, xb, yb) < 0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
287
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
288 // copy image block
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
289 copy_grays_to_block(block, image, xb * blocksize, yb * blocksize, blocksize, blocksize);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
290
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
291 if (verbose > 0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
292 fprintf(stderr, "embedding bit #%d (= %d) in block at (%d/%d)\n", n, get_signature_bit(n), xb * blocksize, yb * blocksize);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
293 if (verbose > 8) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
294 print_grays(image, xb * blocksize, yb * blocksize, blocksize, blocksize);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
295 fprintf(stderr, "\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
296 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
297
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
298 // sort luminance values in block to represent increasing function F
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
299 sort_grays(block[0], n_block);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
300
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
301 if (verbose > 8) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
302 print_grays(block, 0, 0, blocksize, blocksize);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
303 fprintf(stderr, "\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
304 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
305
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
306 // calculate slopes of F and determine smax, the max. slope of F
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
307 // the index where smax occures is called alpha
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
308 alpha = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
309 smax = 0.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
310 for (i = 0; i < n_block - 1; i++) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
311 slope[i] = block[0][i + 1] - block[0][i];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
312 if (slope[i] > smax) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
313 smax = slope[i];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
314 alpha = i;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
315 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
316 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
317 slope[n_block - 1] = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
318
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
319 // block type classification
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
320 blocktype = BLOCKTYPE_UNKNOWN;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
321
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
322 if (smax < threshold_noise) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
323 // block has noise contrast
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
324
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
325 blocktype = BLOCKTYPE_NOISE;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
326 beta_minus = beta_plus = alpha;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
327 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
328 else {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
329 // block has progressive or hard contrast, let's find out...
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
330
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
331 beta_minus = alpha - 1;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
332 while (beta_minus >= 0 && smax - slope[beta_minus] <= threshold_slope)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
333 beta_minus--;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
334
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
335 beta_plus = alpha + 1;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
336 while (beta_plus < n_block && smax - slope[beta_plus] <= threshold_slope)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
337 beta_plus++;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
338
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
339 if (beta_minus + 1 == alpha && beta_plus - 1 == alpha)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
340 blocktype = BLOCKTYPE_HARD;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
341 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
342 blocktype = BLOCKTYPE_PROGRESSIVE;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
343 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
344
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
345 if (verbose > 1) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
346 fprintf(stderr, "blocktype: %d\n", blocktype);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
347 fprintf(stderr, "Smax = %lf, alpha = %d, beta- = %d, beta+ = %d\n", smax, alpha, beta_minus, beta_plus);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
348 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
349
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
350 // block pixel classification
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
351 for (i = 0; i < blocksize; i++)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
352 for (j = 0; j < blocksize; j++) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
353 gray pixel = image[yb * blocksize + j][xb * blocksize + i];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
354 zone[j][i] = ZONE_VOID;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
355 switch (blocktype) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
356 case BLOCKTYPE_PROGRESSIVE:
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
357 case BLOCKTYPE_HARD:
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
358 if (pixel < block[0][beta_minus])
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
359 zone[j][i] = ZONE_1;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
360 else if (pixel > block[0][beta_plus])
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
361 zone[j][i] = ZONE_2;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
362 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
363 case BLOCKTYPE_NOISE:
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
364 if (pixel < block[0][n_block / 2])
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
365 zone[j][i] = ZONE_1;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
366 else if (pixel > block[0][n_block / 2])
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
367 zone[j][i] = ZONE_2;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
368 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
369 default:
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
370 fprintf(stderr, "%s: invalid block type\n", progname);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
371 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
372 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
373 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
374
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
375 if (verbose > 8) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
376 print_grays(zone, 0, 0, blocksize, blocksize);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
377 fprintf(stderr, "\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
378 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
379
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
380 // calculate mean values for zone/categories
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
381 mean_1A = mean_1B = mean_2A = mean_2B = mean_1 = mean_2 = 0.0;
8
f83ef905a63d fixing many warnings
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 0
diff changeset
382 mean__1A = mean__1B = mean__2A = mean__2B = 0.0;
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
383 n_1A = n_1B = n_2A = n_2B = n_1 = n_2 = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
384 for (i = 0; i < blocksize; i++)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
385 for (j = 0; j < blocksize; j++) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
386 gray pixel = image[yb * blocksize + j][xb * blocksize + i];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
387 int pixel_zone = zone[j][i];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
388 int pixel_category = CATEGORY_VOID;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
389 if (pixel_zone == ZONE_1)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
390 pixel_category = category1[j][i];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
391 else if (pixel_zone == ZONE_2)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
392 pixel_category = category2[j][i];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
393
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
394 switch (pixel_zone | pixel_category) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
395 case CLASSIFICATION_1A:
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
396 n_1++;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
397 n_1A++;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
398 mean_1A += pixel;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
399 mean_1 += pixel;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
400 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
401 case CLASSIFICATION_1B:
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
402 n_1++;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
403 n_1B++;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
404 mean_1B += pixel;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
405 mean_1 += pixel;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
406 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
407 case CLASSIFICATION_2A:
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
408 n_2++;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
409 n_2A++;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
410 mean_2A += pixel;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
411 mean_2 += pixel;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
412 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
413 case CLASSIFICATION_2B:
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
414 n_2++;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
415 n_2B++;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
416 mean_2B += pixel;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
417 mean_2 += pixel;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
418 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
419 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
420 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
421
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
422 if (n_1 && n_1A && n_1B) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
423 mean_1 /= (double) n_1;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
424 mean_1A /= (double) n_1A;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
425 mean_1B /= (double) n_1B;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
426 zone1_ok = 1;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
427 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
428 else {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
429 mean_1 = mean_1A = mean_1B = 0.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
430 zone1_ok = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
431 if (verbose > 0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
432 fprintf(stderr, "zone 1 unusable\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
433 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
434
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
435 if (n_2 && n_2A && n_2B) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
436 mean_2 /= (double) n_2;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
437 mean_2A /= (double) n_2A;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
438 mean_2B /= (double) n_2B;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
439 zone2_ok = 1;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
440 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
441 else {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
442 mean_2 = mean_2A = mean_2B = 0.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
443 zone2_ok = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
444 if (verbose > 0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
445 fprintf(stderr, "zone 2 unusable\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
446 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
447
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
448 if (!skipping && !zone1_ok && !zone2_ok) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
449 // pathological case - can it ever happen?
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
450 if (verbose > 0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
451 fprintf(stderr, "block skipped\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
452 continue;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
453 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
454
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
455 if (verbose > 2) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
456 fprintf(stderr, "m_1 = %lf, m_1A = %lf, m_1B = %lf\n", mean_1, mean_1A, mean_1B);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
457 fprintf(stderr, "m_2 = %lf, m_2A = %lf, m_2B = %lf\n", mean_2, mean_2A, mean_2B);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
458 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
459
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
460 // calculate new mean values required by embedding rule
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
461 if (get_signature_bit(n)) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
462 if (zone1_ok) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
463 mean__1A = (mean_1 * (double) (n_1A + n_1B) + (double) n_1B * quality) / (double) (n_1A + n_1B);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
464 mean__1B = mean__1A - quality;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
465 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
466 if (zone2_ok) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
467 mean__2A = (mean_2 * (double) (n_2A + n_2B) + (double) n_2B * quality) / (double) (n_2A + n_2B);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
468 mean__2B = mean__2A - quality;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
469 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
470 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
471 else {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
472 if (zone1_ok) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
473 mean__1A = (mean_1 * (double) (n_1A + n_1B) - (double) n_1B * quality) / (double) (n_1A + n_1B);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
474 mean__1B = mean__1A + quality;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
475 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
476 if (zone2_ok) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
477 mean__2A = (mean_2 * (double) (n_2A + n_2B) - (double) n_2B * quality) / (double) (n_2A + n_2B);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
478 mean__2B = mean__2A + quality;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
479 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
480 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
481
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
482 // calculate luminance variations
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
483 if (zone1_ok) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
484 var_1A = rint(mean__1A - mean_1A);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
485 var_1B = rint(mean__1B - mean_1B);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
486 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
487 else var_1A = var_1B = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
488
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
489 if (zone2_ok) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
490 var_2A = rint(mean__2A - mean_2A);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
491 var_2B = rint(mean__2B - mean_2B);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
492 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
493 else var_2A = var_2B = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
494
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
495 if (verbose > 2) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
496 if (zone1_ok)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
497 fprintf(stderr, "m*_1A = %lf, m*_1B = %lf\n", mean__1A, mean__1B);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
498 if (zone2_ok)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
499 fprintf(stderr, "m*_2A = %lf, m*_2B = %lf\n", mean__2A, mean__2B);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
500 fprintf(stderr, "var %d %d %d %d\n", var_1A, var_1B, var_2A, var_2B);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
501 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
502
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
503 // apply luminance variations to image pixels
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
504 for (i = 0; i < blocksize; i++)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
505 for (j = 0; j < blocksize; j++) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
506 int pixel = image[yb * blocksize + j][xb * blocksize + i];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
507 int pixel_zone = zone[j][i];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
508 int pixel_category = CATEGORY_VOID;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
509 if (pixel_zone == ZONE_1)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
510 pixel_category = category1[j][i];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
511 else if (pixel_zone == ZONE_2)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
512 pixel_category = category2[j][i];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
513
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
514 switch (pixel_zone | pixel_category) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
515 case CLASSIFICATION_1A:
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
516 pixel = GRAYRANGE(pixel + var_1A);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
517 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
518 case CLASSIFICATION_1B:
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
519 pixel = GRAYRANGE(pixel + var_1B);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
520 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
521 case CLASSIFICATION_2A:
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
522 pixel = GRAYRANGE(pixel + var_2A);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
523 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
524 case CLASSIFICATION_2B:
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
525 pixel = GRAYRANGE(pixel + var_2B);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
526 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
527 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
528 image[yb * blocksize + j][xb * blocksize + i] = pixel;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
529 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
530
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
531 n++;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
532 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
533
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
534 free_grays(category2);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
535 free_grays(category1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
536 free_grays(zone);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
537 free_grays(block);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
538
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
539 // write output image dimensions to output file
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
540 pgm_writepgminit(out, cols, rows, maxval, 0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
541
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
542 // write output image
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
543 for (row = 0; row < rows; row++)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
544 pgm_writepgmrow(out, image[row], cols, maxval, 0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
545
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
546 fclose(out);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
547
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
548 pgm_freearray(image, rows);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
549
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
550 exit(0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
551 }

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