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1 #include "wm.h"
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2 #include "dwt.h"
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3 #include "wang_common.h"
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4 #include "dwt_util.h"
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5 #include "pgm.h"
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6
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7 char *progname;
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8
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9 void usage(void) {
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10 fprintf(stderr, "usage: %s [-a n] [-b n] [-e n] [-f n] [-F n] [-h] [-o file] [-v n] -s file file\n\n", progname);
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11 fprintf(stderr, "\t-a n\t\talpha factor/embedding strength\n");
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12 fprintf(stderr, "\t-b n\t\tsubband weighting factor\n");
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13 fprintf(stderr, "\t-e n\t\twavelet filtering method\n");
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14 fprintf(stderr, "\t-f n\t\tfilter number\n");
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15 fprintf(stderr, "\t-F file\t\tfilter definition file\n");
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16 fprintf(stderr, "\t-h\t\tprint usage\n");
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17 fprintf(stderr, "\t-o file\t\toutput (watermarked) file\n");
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18 fprintf(stderr, "\t-s file\t\tsignature to embed in input image\n");
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19 fprintf(stderr, "\t-v n\t\tverbosity level\n");
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20 exit(0);
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21 }
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22
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23 int main(int argc, char *argv[]) {
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24
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25 FILE *in = stdin;
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26 FILE *out = stdout;
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27 FILE *sig = NULL;
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28
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29 char output_name[MAXPATHLEN] = "(stdout)";
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30 char input_name[MAXPATHLEN] = "(stdin)";
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31 char signature_name[MAXPATHLEN];
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32
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33 int i, c, w;
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34 int row, col;
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35
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36 int n;
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37
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38 double alpha = 0.0;
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39 double beta = 0.0;
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40
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41 int filter = 0;
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42 int method = -1;
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43 int levels;
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44 char filter_name[MAXPATHLEN] = "";
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45
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46 int verbose = 0;
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47
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48 gray **image;
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49 Image_tree dwts;
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50
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51 gray maxval;
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52 int rows, cols, colors, format;
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53
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54 double *watermark;
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55
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56 progname = argv[0];
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57
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58 pgm_init(&argc, argv); wm_init();
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59
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60 while ((c = getopt(argc, argv, "a:b:e:f:F:h?o:s:v:")) != EOF) {
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61 switch (c) {
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62 case 'a':
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63 alpha = atof(optarg);
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64 if (alpha <= 0.0) {
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65 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha);
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66 exit(1);
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67 }
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68 break;
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69 case 'b':
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70 beta = atof(optarg);
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71 if (beta <= 0.0) {
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72 fprintf(stderr, "%s: beta factor %f out of range\n", progname, beta);
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73 exit(1);
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74 }
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75 break;
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76 case 'e':
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77 method = atoi(optarg);
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78 if (method < 0) {
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79 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method);
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80 exit(1);
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81 }
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82 break;
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83 case 'f':
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84 filter = atoi(optarg);
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85 if (filter <= 0) {
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86 fprintf(stderr, "%s: filter number %d out of range\n", progname, filter);
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87 exit(1);
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88 }
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89 break;
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90 case 'F':
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91 strcpy(filter_name, optarg);
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92 break;
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93 case 'h':
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94 case '?':
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95 usage();
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96 break;
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97 case 'o':
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98 if ((out = fopen(optarg, "wb")) == NULL) {
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99 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
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100 exit(1);
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101 }
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102 strcpy(output_name, optarg);
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103 break;
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104 case 's':
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105 if ((sig = fopen(optarg, "r")) == NULL) {
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106 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
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107 exit(1);
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108 }
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109 strcpy(signature_name, optarg);
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110 break;
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111 case 'v':
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112 verbose = atoi(optarg);
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113 if (verbose < 0) {
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114 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose);
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115 exit(1);
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116 }
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117 break;
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118 }
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119 }
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120
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121 argc -= optind;
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122 argv += optind;
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123
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124 if (argc > 1) {
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125 usage();
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126 exit(1);
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127 }
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128
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129 if (argc == 1 && *argv[0] != '-')
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130 if ((in = fopen(argv[0], "rb")) == NULL) {
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131 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
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132 exit(1);
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133 }
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134 else
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135 strcpy(input_name, argv[0]);
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136
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137 if (sig) {
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138 char line[32];
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139 fgets(line, sizeof(line), sig);
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140 if (strspn(line, "WGSG") >= 4) {
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141 fscanf(sig, "%d\n", &n);
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142 if (alpha == 0.0)
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143 fscanf(sig, "%lf\n", &alpha);
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144 else
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145 fscanf(sig, "%*lf\n");
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146 if (beta == 0.0)
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147 fscanf(sig, "%lf\n", &beta);
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148 else
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149 fscanf(sig, "%*lf\n");
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150 if (method < 0)
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151 fscanf(sig, "%d\n", &method);
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152 else
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153 fscanf(sig, "%*d\n");
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154 if (filter == 0)
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155 fscanf(sig, "%d\n", &filter);
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156 else
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157 fscanf(sig, "%*d\n");
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158 if (!strcmp(filter_name, ""))
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159 fscanf(sig, "%[^\n\r]\n", &filter_name);
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160 else
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161 fscanf(sig, "%*[^\n\r]\n");
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162 }
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163 else {
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164 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
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165 exit(1);
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166 }
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167 }
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168 else {
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169 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname);
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170 exit(1);
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171 }
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172
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173 watermark = malloc(n * sizeof(double));
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174 for (i = 0; i < n; i++)
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175 fscanf(sig, "%lf\n", &watermark[i]);
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176 fclose(sig);
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177
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178 pgm_readpgminit(in, &cols, &rows, &maxval, &format);
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179
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180 image = pgm_allocarray(cols, rows);
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181
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182 for (row = 0; row < rows; row++)
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183 pgm_readpgmrow(in, image[row], cols, maxval, format);
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184
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185 fclose(in);
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186
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187 // complete decomposition
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188 levels = find_deepest_level(cols, rows) - 1;
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189
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190 // wavelet transform
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191 init_dwt(cols, rows, filter_name, filter, levels, method);
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192 #ifdef POLLEN_STUFF
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193 #include "pollen_stuff.xxx"
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194 #endif
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195 #ifdef PARAM_STUFF
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196 #include "param_stuff.xxx"
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197 #endif
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198
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199 dwts = fdwt(image);
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200
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201 // build tree for subband selection, calculate subband thresholds
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202 init_subbands(dwts);
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203 set_subbands_type_beta(HORIZONTAL, beta);
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204 set_subbands_type_beta(VERTICAL, beta);
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205 calc_subbands_threshold();
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206
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207 w = 0;
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208 while (w < n) {
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209 Subband_data s;
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210
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211 // select subband with max. threshold
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212 s = select_subband();
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213 if (verbose > 1)
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214 fprintf(stderr, "%s: selected subband %s%d, T=%lf, beta=%lf\n", progname, subband_name(s->type), s->level, s->T, s->beta);
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215
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216 // watermark significant coefficients and set them selected
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217 // check is entire signature has been embedded
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218 c = select_subband_coeff(s);
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219 do {
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220 double p;
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221 if (c < 0)
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222 // no more significant coefficients in subband
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223 break;
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224
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225 p = get_subband_coeff(s, c);
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226 if (p < s->Cmax) {
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227 if (verbose > 2)
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228 fprintf(stderr, "%s: embedding sig. coeff. #%d (= %lf)\n into %s%d coeff. #%d\n",
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229 progname, w, watermark[w], subband_name(s->type), s->level, c);
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230
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231 p = p + alpha * s->beta * s->T * watermark[w];
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232 set_subband_coeff(s, c, p);
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233 w++;
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234 }
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235 mark_subband_coeff(s, c);
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236
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237 // select next significant coefficient
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238 c = select_subband_coeff_from(s, c);
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239 } while (w < n);
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240
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241 // update subband threshold
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242 s->T /= 2.0;
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243
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244 }
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245
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246 free_subbands();
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247
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248 free(watermark);
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249
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250 idwt(dwts, image);
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251
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252 pgm_writepgminit(out, cols, rows, maxval, 0);
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253
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254 for (row = 0; row < rows; row++)
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255 pgm_writepgmrow(out, image[row], cols, maxval, 0);
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256
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257 fclose(out);
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258
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259 pgm_freearray(image, rows);
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260
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261 exit(0);
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262 }
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