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1 #include "wm.h"
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2 #include "pgm.h"
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3
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4 char *progname;
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5
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6 void usage(void) {
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7 fprintf(stderr, "usage: %s [-C] [-h] [-m n] [-o file] [-pP] [-r file] -i file file\n\n", progname);
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8 fprintf(stderr, "\t-C\t\tprint PSNR value only\n");
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9 fprintf(stderr, "\t-h\t\tprint usage\n");
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10 fprintf(stderr, "\t-i file\t\toriginal image file\n");
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11 fprintf(stderr, "\t-m n\t\tmultiplication factor (default auto)\n");
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12 fprintf(stderr, "\t-o file\t\toutput file for difference image\n");
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13 fprintf(stderr, "\t-p\t\tprint PSNR, RMS and MSE\n");
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14 fprintf(stderr, "\t-P\t\tonly print PSNR, RMS and MSE, no difference image\n");
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15 fprintf(stderr, "\t-r file\t\tROI (region-of-interest) mask (default none)\n");
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16 exit(0);
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17 }
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18
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19 int main(int argc, char *argv[]) {
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20
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21 FILE *in = stdin;
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22 FILE *out = stdout;
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23 FILE *orig = NULL;
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24 FILE *roi = NULL;
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25
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26 gray **input_image;
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27 gray **orig_image;
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28 gray **roi_image;
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29
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30 char output_name[MAXPATHLEN] = "(stdout)";
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31 char input_name[MAXPATHLEN] = "(stdin)";
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32 char orig_name[MAXPATHLEN];
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33 char roi_name[MAXPATHLEN];
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34
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35 int in_cols, in_rows, in_format;
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36 gray in_maxval;
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37 int roi_cols, roi_rows, roi_format;
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38 gray roi_maxval;
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39 int orig_cols, orig_rows, orig_format;
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40 gray orig_maxval;
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41 int cols, rows, format;
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42 gray maxval;
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43 int col, row;
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44
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45 int roisize = 0;
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46
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47 int i;
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48 int c;
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49
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50 int m = 0;
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51 int min, max;
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52
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53 int print_psnr = 0;
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54 int print_psnr_only = 0;
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55 int print_psnr_value_only = 0;
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56 double error = 0.0;
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57
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58 progname = argv[0];
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59
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60 pgm_init(&argc, argv); wm_init();
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61
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62 while ((c = getopt(argc, argv, "h?i:m:o:r:pPC")) != EOF) {
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63 switch (c) {
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64 case 'h':
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65 case '?':
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66 usage();
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67 break;
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68 case 'i':
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69 if ((orig = fopen(optarg, "rb")) == NULL) {
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70 fprintf(stderr, "%s: unable to open original image file %s\n", progname, optarg);
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71 exit(1);
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72 }
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73 strcpy(orig_name, optarg);
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74 break;
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75 case 'r':
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76 if ((roi = fopen(optarg, "rb")) == NULL) {
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77 fprintf(stderr, "%s: unable to open ROI image file %s\n", progname, optarg);
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78 exit(1);
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79 }
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80 strcpy(roi_name, optarg);
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81 break;
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82 case 'm':
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83 m = atoi(optarg);
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84 if (m <= 0) {
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85 fprintf(stderr, "%s: multiplication factor %d out of range\n", progname, m);
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86 exit(1);
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87 }
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88 break;
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89 case 'o':
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90 if ((out = fopen(optarg, "wb")) == NULL) {
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91 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
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92 exit(1);
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93 }
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94 strcpy(output_name, optarg);
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95 break;
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96 case 'p':
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97 print_psnr = 1;
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98 break;
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99 case 'P':
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100 print_psnr_only = 1;
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101 break;
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102 case 'C':
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103 print_psnr_value_only = 1;
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104 print_psnr_only = 1;
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105 break;
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106 }
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107 }
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108
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109 argc -= optind;
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110 argv += optind;
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111
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112 if (argc > 1) {
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113 usage();
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114 exit(1);
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115 }
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116
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117 if (argc == 1 && *argv[0] != '-')
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118 if ((in = fopen(argv[0], "rb")) == NULL) {
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119 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
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120 exit(1);
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121 }
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122 else
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123 strcpy(input_name, argv[0]);
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124
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125 if (!orig) {
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126 fprintf(stderr, "%s: original image file not specified, use -i file option\n", progname);
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127 exit(1);
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128 }
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129
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130 pgm_readpgminit(in, &in_cols, &in_rows, &in_maxval, &in_format);
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131
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132 if (orig) {
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133 pgm_readpgminit(orig, &orig_cols, &orig_rows, &orig_maxval, &orig_format);
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134
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135 if (in_cols != orig_cols || in_rows != orig_rows) {
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136 fprintf(stderr, "%s: input image %s does not match dimensions of original image %s\n", progname, input_name, orig_name);
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137 exit(1);
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138 }
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139 }
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140
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141 if (roi) {
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142 pgm_readpgminit(roi, &roi_cols, &roi_rows, &roi_maxval, &roi_format);
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143
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144 if (in_cols != roi_cols || in_rows != roi_rows) {
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145 fprintf(stderr, "%s: input image %s does not match dimensions of ROI image %s\n", progname, input_name, roi_name);
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146 exit(1);
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147 }
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148 }
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149
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150 cols = in_cols;
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151 rows = in_rows;
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152 format = in_format;
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153 maxval = in_maxval;
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154
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155 input_image = pgm_allocarray(cols, rows);
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156 orig_image = pgm_allocarray(cols, rows);
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157 roi_image = pgm_allocarray(cols, rows);
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158
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159 for (row = 0; row < rows; row++) {
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160 pgm_readpgmrow(in, input_image[row], cols, in_maxval, in_format);
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161 if (orig)
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162 pgm_readpgmrow(orig, orig_image[row], cols, orig_maxval, orig_format);
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163 else
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164 memset(orig_image[row], cols, 0);
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165 if (roi)
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166 pgm_readpgmrow(roi, roi_image[row], cols, roi_maxval, roi_format);
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167 else
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168 memset(roi_image[row], cols, PGM_MAXMAXVAL);
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169 }
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170
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171 fclose(in);
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172 if (orig) fclose(orig);
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173 if (roi) fclose(roi);
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174
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175 max = 0;
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176 min = PGM_MAXMAXVAL;
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177
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178 for (row = 0; row < rows; row++) {
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179 gray *pi = input_image[row];
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180 gray *po = orig_image[row];
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181 gray *pr = roi_image[row];
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182
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183 for (col = 0; col < cols; col++) {
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184 int diff = abs(*pi - *po);
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185 int inroi = (!roi || *pr > 0);
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186
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187 pi++;
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188 po++;
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189 pr++;
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190
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191 if (roi && !inroi)
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192 continue;
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193
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194 roisize++;
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195
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196 error += sqr(diff);
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197 if (diff < min) min = diff;
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198 if (diff > max) max = diff;
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199
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200 }
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201 }
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202
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203 for (row = 0; row < rows; row++) {
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204 gray *pi = input_image[row];
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205 gray *po = orig_image[row];
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206 gray *pr = roi_image[row];
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207
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208 for (col = 0; col < cols; col++) {
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209 int diff = abs(*pi - *po);
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210 int inroi = (!roi || *pr > 0);
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211
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212 if (!inroi) {
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213 *pi = 0;
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214 }
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215 else {
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216 if (m > 0)
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217 *pi = PIXELRANGE(diff * m);
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218 else
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219 *pi = PIXELRANGE((double) (diff - min) / (double) (max - min) * maxval);
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220 }
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221
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222 pi++;
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223 po++;
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224 pr++;
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225
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226 }
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227 }
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228
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229 if (!print_psnr_only) {
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230 pgm_writepgminit(out, cols, rows, maxval, 0);
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231 for (row = 0; row < rows; row++)
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232 pgm_writepgmrow(out, input_image[row], cols, maxval, 0);
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233
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234 fclose(out);
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235 }
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236
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237 pgm_freearray(input_image, rows);
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238 pgm_freearray(orig_image, rows);
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239 pgm_freearray(roi_image, rows);
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240
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241 if (print_psnr || print_psnr_only) {
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242 double mse = (roisize) ? error / (double) roisize : 0;
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243 double rmse = sqrt(mse);
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244 double psnr = (rmse) ? 20.0 * log(255.0 / rmse) / log(10.0) : 0;
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245 FILE *print = print_psnr_only ? out : stderr;
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246 if (!print_psnr_value_only) {
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247 if (roi)
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248 fprintf(print, "ROI size: %d\n", roisize);
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249 if (mse > 0.0)
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250 fprintf(print, "PSNR: %lf dB\n", psnr);
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251 else
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252 fprintf(print, "PSNR: inf\n");
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253 fprintf(print, "RMSE: %lf\n", rmse);
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254 fprintf(print, "MSE: %lf\n", mse);
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255 fprintf(print, "dmin, dmax: %d, %d\n", min, max);
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256 }
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257 else
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258 fprintf(print, "%lf\n", mse > 0.0 ? psnr : 100.0);
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259 }
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260
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261 exit(0);
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262 }
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