annotate Meerwald/cmp_dct8x8.c @ 0:be303a3f5ea8

import
author Peter Meerwald <pmeerw@cosy.sbg.ac.at>
date Sun, 12 Aug 2007 13:14:34 +0200
parents
children f83ef905a63d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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1 #include "wm.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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2 #include "dct.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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3 #include "gray.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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4 #include "pgm.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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6 char *progname;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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7
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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8 void usage(void) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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9 fprintf(stderr, "usage: %s [-h] [-m n] [-o file] [-pP] -i file file\n\n", progname);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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10 fprintf(stderr, "\t-h\t\tprint usage\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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11 fprintf(stderr, "\t-i file\t\toriginal image file\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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12 fprintf(stderr, "\t-m n\t\tmultiplication factor (default 16)\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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13 fprintf(stderr, "\t-o file\t\toutput file\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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14 fprintf(stderr, "\t-p\t\tprint PSNR, RMS and MSE\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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15 fprintf(stderr, "\t-P\t\tonly print PSNR, RMS and MSE, no difference image\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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16 exit(0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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17 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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18
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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19 int main(int argc, char *argv[]) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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20
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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21 FILE *in = stdin;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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22 FILE *out = stdout;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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23 FILE *orig = NULL;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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24
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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25 gray **input_image;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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26 gray **orig_image;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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27 double **input_dcts;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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28 double **orig_dcts;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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29 gray **output;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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30
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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31 char output_name[MAXPATHLEN] = "(stdout)";
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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32 char input_name[MAXPATHLEN] = "(stdin)";
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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33 char orig_name[MAXPATHLEN];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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34
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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35 int in_cols, in_rows, in_format;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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36 gray in_maxval;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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37 int orig_cols, orig_rows, orig_format;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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38 gray orig_maxval;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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39 int cols, rows, format;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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40 gray maxval;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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41 int col, row;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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42
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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43 int i, j;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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44 int c;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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45
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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46 int m = 16;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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47
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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48 int print_psnr = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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49 int print_psnr_only = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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50 double error = 0.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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51
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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52 progname = argv[0];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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53
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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54 pgm_init(&argc, argv); wm_init();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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55
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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56 while ((c = getopt(argc, argv, "h?i:m:o:pP")) != EOF) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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57 switch (c) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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58 case 'h':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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59 case '?':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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60 usage();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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61 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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62 case 'i':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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63 if ((orig = fopen(optarg, "rb")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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64 fprintf(stderr, "%s: unable to open original image file %s\n", progname, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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65 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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66 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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67 strcpy(orig_name, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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68 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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69 case 'm':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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70 m = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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71 if (m <= 0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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72 fprintf(stderr, "%s: multiplication factor %d out of range\n", progname, m);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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73 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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74 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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75 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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76 case 'o':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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77 if ((out = fopen(optarg, "w")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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78 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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79 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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80 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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81 strcpy(output_name, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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82 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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83 case 'p':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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84 print_psnr = 1;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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85 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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86 case 'P':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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87 print_psnr_only = 1;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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88 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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89 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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90 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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91
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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92 argc -= optind;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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93 argv += optind;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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94
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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95 if (argc > 1) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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96 usage();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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97 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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98 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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99
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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100 if (argc == 1 && *argv[0] != '-')
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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101 if ((in = fopen(argv[0], "rb")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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102 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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103 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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104 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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105 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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106 strcpy(input_name, argv[0]);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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107
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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108 if (!orig) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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109 fprintf(stderr, "%s: original image file not specified, use -i file option\n", progname);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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110 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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111 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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112
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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113 pgm_readpgminit(in, &in_cols, &in_rows, &in_maxval, &in_format);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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114
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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115 pgm_readpgminit(orig, &orig_cols, &orig_rows, &orig_maxval, &orig_format);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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116
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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117 if (in_cols != orig_cols || in_rows != orig_rows) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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118 fprintf(stderr, "%s: input image %s does not match dimensions of original image %s\n", progname, input_name, orig_name);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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119 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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120 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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121
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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122 if (cols % NJPEG) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
123 fprintf(stderr, "%s: image width %d not a multiple of %d\n", progname, cols, NJPEG);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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124 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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125 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
126
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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127 if (rows % NJPEG) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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128 fprintf(stderr, "%s: image height %d not a multiple of %d\n", progname, rows, NJPEG);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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129 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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130 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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131
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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132 cols = in_cols;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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133 rows = in_rows;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
134 format = in_format;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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135 maxval = in_maxval;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
136
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
137 input_image = pgm_allocarray(cols, NJPEG);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
138 orig_image = pgm_allocarray(cols, NJPEG);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
139
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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140 init_dct_8x8();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
141 input_dcts = alloc_coeffs_8x8();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
142 orig_dcts = alloc_coeffs_8x8();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
143 output = alloc_grays(cols, NJPEG);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
144
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
145 if (!print_psnr_only)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
146 pgm_writepgminit(out, cols, rows, maxval, 0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
147
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
148 for (row = 0; row < rows; row += NJPEG) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
149
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
150 for (i = 0; i < NJPEG; i++) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
151 pgm_readpgmrow(in, input_image[row % NJPEG], cols, maxval, format);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
152 pgm_readpgmrow(orig, orig_image[row % NJPEG], cols, maxval, format);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
153 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
154
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
155 for (col = 0; col < cols; col += NJPEG) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
156 fdct_block_8x8(input_image, col, 0, input_dcts);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
157 fdct_block_8x8(orig_image, col, 0, orig_dcts);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
158
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
159 for (i = 0; i < NJPEG; i++)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
160 for (j = 0; j < NJPEG; j++)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
161 error += sqr(input_dcts[j][i + cols] - orig_dcts[j][i + cols]);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
162 output[j][i + col] = PIXELRANGE(fabs(input_dcts[j][i + cols] - orig_dcts[j][i + cols]) * m);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
163 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
164
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
165 if (!print_psnr_only) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
166 for (i = 0; i < NJPEG; i++)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
167 pgm_writepgmrow(out, output[i], cols, maxval, 0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
168 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
169
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
170 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
171 fclose(in);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
172 fclose(orig);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
173 if (!print_psnr_only)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
174 fclose(out);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
175
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
176 pgm_freearray(input_image, NJPEG);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
177 pgm_freearray(orig_image, NJPEG);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
178 free_coeffs(input_dcts);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
179 free_coeffs(orig_dcts);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
180 free_grays(output);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
181
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
182 if (print_psnr || print_psnr_only) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
183 double mse = error / (double) (cols * rows);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
184 double rmse = sqrt(mse);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
185 double psnr = 20.0 * log(255.0 / rmse) / log(10.0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
186 FILE *print = print_psnr_only ? out : stderr;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
187 if (mse > 0.0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
188 fprintf(print, "PSNR: %lf dB\n", psnr);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
189 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
190 fprintf(print, "PSNR: inf\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
191 fprintf(print, "RMS: %lf\n", rmse);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
192 fprintf(print, "MSE: %lf\n", mse);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
193 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
194
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
195 exit(0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
196 }

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