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1 #include "wm.h"
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2 #include "dwt.h"
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3 #include "pgm.h"
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4 #include "dwt_util.h"
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5
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6 char *progname;
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7
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8 void usage(void) {
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9 fprintf(stderr, "usage: %s [-a n] [-e n] [-f n] [-F file] [-h] [-l n] [-o file] [-v n] -s file -i file file\n\n", progname);
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10 fprintf(stderr, "\t-a n\t\talpha factor\n");
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11 fprintf(stderr, "\t-e n\t\twavelet filtering method\n");
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12 fprintf(stderr, "\t-f n\t\tfilter number\n");
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13 fprintf(stderr, "\t-F file\t\tfilter definition file\n");
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14 fprintf(stderr, "\t-h\t\tprint usage\n");
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15 fprintf(stderr, "\t-i file\t\toriginal image file\n");
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16 fprintf(stderr, "\t-l n\t\tdecomposition level\n");
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17 fprintf(stderr, "\t-o file\t\tfile for extracted watermark\n");
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18 fprintf(stderr, "\t-s file\t\toriginal signature file\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 extract_subband(Image_tree s, Image_tree t, int name, double alpha, double watermark[], int n, int verbose) {
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24 int i, j;
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25 int w;
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26
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27 w = 0;
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28 for (i = 5; i < s->image->height-5; i++)
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29 for (j = 5; j < s->image->width-5; j++) {
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30 double input_coeff, orig_coeff;
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31
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32 input_coeff = get_pixel(s->image, i, j);
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33 orig_coeff = get_pixel(t->image, i, j);
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34 if (fabs(orig_coeff) > 20.0)
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35 watermark[w++] = (input_coeff - orig_coeff) / (alpha * pow(fabs(orig_coeff), 1.0 / 1.2));
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36 }
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37
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38 if (verbose > 3)
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39 fprintf(stderr, "%s: extracting %s%d, size %d x %d; extracted %d coeffs.\n",
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40 progname, subband_name(name), s->level, s->image->width, s->image->height, w);
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41
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42 return w;
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43 }
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44
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45 void write_mark(FILE *out, double watermark[], int n) {
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46 int i;
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47
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48 fprintf(out, "%d\n", n);
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49 for (i = 0; i < n; i++)
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50 fprintf(out, "%f\n", watermark[i]);
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51 }
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52
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53 int main(int argc, char *argv[]) {
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54
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55 FILE *in = stdin;
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56 FILE *out = stdout;
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57 FILE *orig = NULL;
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58 FILE *sig = NULL;
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59
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60 gray **input_image;
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61 gray **orig_image;
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62
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63 char signature_name[MAXPATHLEN];
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64 char output_name[MAXPATHLEN] = "(stdout)";
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65 char input_name[MAXPATHLEN] = "(stdin)";
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66 char orig_name[MAXPATHLEN];
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67
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8
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68 int c;
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0
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69 int n = 0;
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70 int method = -1;
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71 int filter = 0;
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72 char filter_name[MAXPATHLEN] = "";
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73
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74 int level = 0, levels;
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75 double alpha = 0.0;
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76
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77 int in_rows, in_cols, in_format;
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78 gray in_maxval;
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79 int orig_rows, orig_cols, orig_format;
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80 gray orig_maxval;
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81 int rows, cols;
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8
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82 int row;
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0
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83
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84 double *watermark;
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85
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86 Image_tree input_dwts, orig_dwts, p, q;
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87
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88 int verbose = 0;
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89
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90 progname = argv[0];
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91
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92 pgm_init(&argc, argv); wm_init2();
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93
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94 while ((c = getopt(argc, argv, "a:e:f:F:h?i:l:o:s:v:")) != EOF) {
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95 switch (c) {
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96 case 'a':
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97 alpha = atof(optarg);
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98 if (alpha <= 0.0) {
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99 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha);
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100 exit(1);
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101 }
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102 break;
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103 case 'e':
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104 method = atoi(optarg);
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105 if (method < 0) {
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106 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method);
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107 exit(1);
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108 }
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109 break;
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110 case 'f':
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111 filter = atoi(optarg);
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112 if (filter <= 0) {
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113 fprintf(stderr, "%s: filter number %d out of range\n", progname, filter);
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114 exit(1);
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115 }
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116 break;
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117 case 'F':
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118 strcpy(filter_name, optarg);
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119 break;
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120 case 'h':
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121 case '?':
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122 usage();
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123 break;
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124 case 'i':
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125 if ((orig = fopen(optarg, "rb")) == NULL) {
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126 fprintf(stderr, "%s: unable to open original image file %s\n", progname, optarg);
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127 exit(1);
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128 }
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129 strcpy(orig_name, optarg);
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130 break;
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131 case 'l':
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132 level = atoi(optarg);
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133 if (level <= 0) {
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134 fprintf(stderr, "%s: decomposition level %d out of range\n", progname, level);
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135 exit(1);
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136 }
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137 break;
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138 case 'o':
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139 if ((out = fopen(optarg, "w")) == NULL) {
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140 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
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141 exit(1);
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142 }
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143 strcpy(output_name, optarg);
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144 break;
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145 case 's':
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146 if ((sig = fopen(optarg, "r")) == NULL) {
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147 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
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148 exit(1);
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149 }
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150 strcpy(signature_name, optarg);
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151 break;
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152 case 'v':
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153 verbose = atoi(optarg);
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154 if (verbose < 0) {
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155 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose);
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156 exit(1);
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157 }
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158 break;
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159 }
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160 }
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161
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162 argc -= optind;
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163 argv += optind;
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164
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165 if (argc > 1) {
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166 usage();
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167 exit(1);
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168 }
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169
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8
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170 if (argc == 1 && *argv[0] != '-') {
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0
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171 if ((in = fopen(argv[0], "rb")) == NULL) {
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172 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
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173 exit(1);
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174 }
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175 else
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176 strcpy(input_name, argv[0]);
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8
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177 }
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178
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0
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179 if (!orig) {
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180 fprintf(stderr, "%s: original image file not specified, use -i file option\n", progname);
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181 exit(1);
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182 }
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183
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184 if (sig) {
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185 char line[32];
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186 fgets(line, sizeof(line), sig);
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187 if (strspn(line, "XASG") >= 4) {
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188 fscanf(sig, "%d\n", &n);
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189 if (alpha == 0.0)
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190 fscanf(sig, "%lf\n", &alpha);
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191 else
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192 fscanf(sig, "%*lf\n");
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193 if (level == 0)
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194 fscanf(sig, "%d\n", &level);
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195 else
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196 fscanf(sig, "%*d\n");
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197 if (method < 0)
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198 fscanf(sig, "%d\n", &method);
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199 else
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200 fscanf(sig, "%*d\n");
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201 if (filter == 0)
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202 fscanf(sig, "%d\n", &filter);
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203 else
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204 fscanf(sig, "%*d\n");
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205 if (!strcmp(filter_name, ""))
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206 fscanf(sig, "%[^\n\r]\n", &filter_name);
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207 else
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208 fscanf(sig, "%*[^\n\r]\n");
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209 }
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210 else {
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211 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
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212 exit(1);
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213 }
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214 fclose(sig);
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215 }
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216 else {
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217 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname);
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218 exit(1);
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219 }
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220
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221 pgm_readpgminit(in, &in_cols, &in_rows, &in_maxval, &in_format);
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222 pgm_readpgminit(orig, &orig_cols, &orig_rows, &orig_maxval, &orig_format);
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223
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224 if (in_cols != orig_cols || in_rows != orig_rows) {
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225 fprintf(stderr, "%s: input image %s does not match dimensions of original image %s\n", progname, input_name, orig_name);
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226 exit(1);
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227 }
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228
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229 cols = in_cols;
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230 rows = in_rows;
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231
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232 input_image = pgm_allocarray(in_cols, in_rows);
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233 orig_image = pgm_allocarray(orig_cols, orig_rows);
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234
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235 for (row = 0; row < in_rows; row++) {
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236 pgm_readpgmrow(in, input_image[row], in_cols, in_maxval, in_format);
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237 pgm_readpgmrow(orig, orig_image[row], orig_cols, orig_maxval, orig_format);
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238 }
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239
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240 fclose(in);
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241 fclose(orig);
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242
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243 // complete decomposition
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244 levels = find_deepest_level(cols, rows) - 1;
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245 if (level > levels) {
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246 fprintf(stderr, "%s: decomposition level %d not possible (max. %d), image size is %d x %d\n", progname, level, levels, cols, rows);
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247 exit(1);
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248 }
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249
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250 init_dwt(cols, rows, filter_name, filter, level, method);
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251 #ifdef POLLEN_STUFF
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3
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252 #include "pollen_stuff.c"
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253 #endif
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254 #ifdef PARAM_STUFF
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3
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255 #include "param_stuff.c"
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256 #endif
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257
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258 input_dwts = fdwt(input_image);
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259 orig_dwts = fdwt(orig_image);
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260
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261 watermark = malloc((rows * cols / 4.0) * sizeof(double));
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262 if (!watermark) {
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263 fprintf(stderr, "%s: malloc() failed\n\n", progname);
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264 exit(1);
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265 }
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266
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267 fprintf(out, "XAWM\n");
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268 fprintf(out, "%d\n", n);
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269 fprintf(out, "%d\n", level * 3);
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270
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271 p = input_dwts;
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272 q = orig_dwts;
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273 while (p->coarse && q->coarse) {
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274 int size;
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275
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276 size = extract_subband(p->horizontal, q->horizontal, HORIZONTAL, alpha, watermark, n, verbose);
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277 write_mark(out, watermark, size);
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278 size = extract_subband(p->vertical, q->vertical, VERTICAL, alpha, watermark, n, verbose);
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279 write_mark(out, watermark, size);
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280 size = extract_subband(p->diagonal, q->diagonal, DIAGONAL, alpha, watermark, n, verbose);
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281 write_mark(out, watermark, size);
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282
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283 p = p->coarse;
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284 q = q->coarse;
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285 }
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286
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287 fclose(out);
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288
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289 free(watermark);
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290
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291 pgm_freearray(input_image, rows);
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292 pgm_freearray(orig_image, rows);
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293
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294 exit(0);
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295 }
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