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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
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5 char *progname;
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6
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7 void usage(void) {
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8 fprintf(stderr, "usage: %s [-a n] [-e n] [-f n] [-F n] [-h] [-o file] [-v n] -s file file\n\n", progname);
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9 fprintf(stderr, "\t-a n\t\talpha factor/embedding strength\n");
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10 fprintf(stderr, "\t-e n\t\twavelet filtering method\n");
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11 fprintf(stderr, "\t-f n\t\tfilter number\n");
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12 fprintf(stderr, "\t-F file\t\tfilter definition file\n");
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13 fprintf(stderr, "\t-h\t\tprint usage\n");
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14 fprintf(stderr, "\t-o file\t\toutput (watermarked) file\n");
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15 fprintf(stderr, "\t-s file\t\tsignature to embed in input image\n");
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16 fprintf(stderr, "\t-v n\t\tverbosity level\n");
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17 exit(0);
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18 }
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19
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20 int main(int argc, char *argv[]) {
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21
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22 FILE *in = stdin;
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23 FILE *out = stdout;
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24 FILE *sig = NULL;
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25
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26 char output_name[MAXPATHLEN] = "(stdout)";
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27 char input_name[MAXPATHLEN] = "(stdin)";
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28 char signature_name[MAXPATHLEN];
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29
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30 int c;
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31 int row, col;
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32
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33 int n;
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34
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35 double alpha = 0.0;
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36
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37 int filter = 0;
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38 int method = -1;
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39 int level;
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40 char filter_name[MAXPATHLEN] = "";
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41
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42 int verbose = 0;
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43
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44 gray **image;
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45 Image_tree dwts;
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46
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47 gray maxval;
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48 int rows, cols, colors, format;
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49
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50 progname = argv[0];
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51
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52 pgm_init(&argc, argv); wm_init();
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53
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54 while ((c = getopt(argc, argv, "a:e:f:F:h?o:s:v:")) != EOF) {
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55 switch (c) {
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56 case 'a':
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57 alpha = atof(optarg);
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58 if (alpha <= 0.0) {
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59 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha);
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60 exit(1);
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61 }
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62 break;
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63 case 'e':
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64 method = atoi(optarg);
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65 if (method < 0) {
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66 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method);
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67 exit(1);
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68 }
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69 break;
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70 case 'f':
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71 filter = atoi(optarg);
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72 if (filter <= 0) {
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73 fprintf(stderr, "%s: filter number %d out of range\n", progname, filter);
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74 exit(1);
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75 }
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76 break;
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77 case 'F':
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78 strcpy(filter_name, optarg);
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79 break;
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80 case 'h':
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81 case '?':
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82 usage();
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83 break;
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84 case 'o':
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85 if ((out = fopen(optarg, "wb")) == NULL) {
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86 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
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87 exit(1);
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88 }
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89 strcpy(output_name, optarg);
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90 break;
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91 case 's':
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92 if ((sig = fopen(optarg, "r")) == NULL) {
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93 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
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94 exit(1);
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95 }
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96 strcpy(signature_name, optarg);
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97 break;
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98 case 'v':
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99 verbose = atoi(optarg);
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100 if (verbose < 0) {
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101 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose);
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102 exit(1);
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103 }
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104 break;
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105 }
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106 }
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107
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108 argc -= optind;
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109 argv += optind;
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110
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111 if (argc > 1) {
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112 usage();
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113 exit(1);
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114 }
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115
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116 if (argc == 1 && *argv[0] != '-')
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117 if ((in = fopen(argv[0], "rb")) == NULL) {
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118 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
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119 exit(1);
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120 }
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121 else
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122 strcpy(input_name, argv[0]);
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123
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124 if (sig) {
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125 char line[32];
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126 fgets(line, sizeof(line), sig);
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127 if (strspn(line, "CVSG") >= 4) {
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128 fscanf(sig, "%d\n", &n);
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129 if (alpha == 0.0)
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130 fscanf(sig, "%lf\n", &alpha);
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131 else
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132 fscanf(sig, "%*lf\n");
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133 if (method < 0)
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134 fscanf(sig, "%d\n", &method);
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135 else
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136 fscanf(sig, "%*d\n");
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137 if (filter == 0)
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138 fscanf(sig, "%d\n", &filter);
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139 else
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140 fscanf(sig, "%*d\n");
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141 if (!strcmp(filter_name, ""))
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142 fscanf(sig, "%[^\n\r]\n", &filter_name);
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143 else
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144 fscanf(sig, "%*[^\n\r]\n");
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145 }
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146 else {
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147 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
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148 exit(1);
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149 }
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150 }
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151 else {
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152 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname);
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153 exit(1);
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154 }
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155
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156 pgm_readpgminit(in, &cols, &rows, &maxval, &format);
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157
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158 image = pgm_allocarray(cols, rows);
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159
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160 for (row = 0; row < rows; row++)
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161 pgm_readpgmrow(in, image[row], cols, maxval, format);
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162
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163 fclose(in);
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164
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165 level = 0;
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166 row = rows;
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167 col = cols;
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168 while (n < row * col / 4.0 && row >= 2 && col >= 2) {
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169 row /= 2;
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170 col /= 2;
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171 level++;
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172 }
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173
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174 if (verbose >= 2) {
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175 fprintf(stderr, "%s: embedding into coarse image (x %d/y %d) at level %d\n", progname, col, row, level);
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176 }
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177
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178 init_dwt(cols, rows, filter_name, filter, level, method);
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179 #ifdef POLLEN_STUFF
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180 #include "pollen_stuff.xxx"
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181 #endif
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182 #ifdef PARAM_STUFF
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183 #include "param_stuff.xxx"
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184 #endif
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185
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186 dwts = fdwt(image);
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187
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188 {
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189 Image_tree p = dwts;
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190 Image img;
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191 double med;
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192
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193 while (!p->image)
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194 p = p->coarse;
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195
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196 img = p->image;
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197
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198 med = 0.0;
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199 for (row = 0; row < img->height; row++)
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200 for (col = 0; col < img->width; col++)
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201 med += get_pixel(img, col, row);
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202
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203 med /= (double) (img->height * img->width);
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204
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205 row = 0;
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206 col = 0;
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207 while (n > 0) {
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208 double pix;
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209 double g;
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210
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211 fscanf(sig, "%lf\n", &g);
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212
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213 pix = get_pixel(img, col, row);
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214 pix = med + (pix - med) * (1.0 + alpha * g);
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215 set_pixel(img, col, row, pix);
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216
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217 if (++col == img->width) { col = 0; row++; }
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218 n--;
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219 }
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220 }
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221
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222 fclose(sig);
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223
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224 idwt(dwts, image);
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225
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226 pgm_writepgminit(out, cols, rows, maxval, 0);
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227
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228 for (row = 0; row < rows; row++)
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229 pgm_writepgmrow(out, image[row], cols, maxval, 0);
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230
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231 fclose(out);
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232
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233 pgm_freearray(image, rows);
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234
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235 exit(0);
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236 }
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