Mercurial > hg > wm
annotate Meerwald/cmp_dct8x8.c @ 22:d8551fb39a5e default tip
Added tag v0.6 for changeset 1c4ccd635a68
| author | Peter Meerwald-Stadler <pmeerw@pmeerw.net> |
|---|---|
| date | Sat, 28 Jan 2023 23:57:51 +0100 |
| parents | bd669312f068 |
| children |
| rev | line source |
|---|---|
| 0 | 1 #include "wm.h" |
| 2 #include "dct.h" | |
| 3 #include "gray.h" | |
| 4 #include "pgm.h" | |
| 5 | |
| 6 char *progname; | |
| 7 | |
| 8 void usage(void) { | |
| 9 fprintf(stderr, "usage: %s [-h] [-m n] [-o file] [-pP] -i file file\n\n", progname); | |
| 10 fprintf(stderr, "\t-h\t\tprint usage\n"); | |
| 11 fprintf(stderr, "\t-i file\t\toriginal image file\n"); | |
| 12 fprintf(stderr, "\t-m n\t\tmultiplication factor (default 16)\n"); | |
| 13 fprintf(stderr, "\t-o file\t\toutput file\n"); | |
| 14 fprintf(stderr, "\t-p\t\tprint PSNR, RMS and MSE\n"); | |
| 15 fprintf(stderr, "\t-P\t\tonly print PSNR, RMS and MSE, no difference image\n"); | |
| 16 exit(0); | |
| 17 } | |
| 18 | |
| 19 int main(int argc, char *argv[]) { | |
| 20 | |
| 21 FILE *in = stdin; | |
| 22 FILE *out = stdout; | |
| 23 FILE *orig = NULL; | |
| 24 | |
| 25 gray **input_image; | |
| 26 gray **orig_image; | |
| 27 double **input_dcts; | |
| 28 double **orig_dcts; | |
| 29 gray **output; | |
| 30 | |
| 31 char output_name[MAXPATHLEN] = "(stdout)"; | |
| 32 char input_name[MAXPATHLEN] = "(stdin)"; | |
| 33 char orig_name[MAXPATHLEN]; | |
| 34 | |
| 35 int in_cols, in_rows, in_format; | |
| 36 gray in_maxval; | |
| 37 int orig_cols, orig_rows, orig_format; | |
| 38 gray orig_maxval; | |
| 39 int cols, rows, format; | |
| 40 gray maxval; | |
| 41 int col, row; | |
| 42 | |
| 43 int i, j; | |
| 44 int c; | |
| 45 | |
| 46 int m = 16; | |
| 47 | |
| 48 int print_psnr = 0; | |
| 49 int print_psnr_only = 0; | |
| 50 double error = 0.0; | |
| 51 | |
| 52 progname = argv[0]; | |
| 53 | |
| 54 pgm_init(&argc, argv); wm_init(); | |
| 55 | |
| 56 while ((c = getopt(argc, argv, "h?i:m:o:pP")) != EOF) { | |
| 57 switch (c) { | |
| 58 case 'h': | |
| 59 case '?': | |
| 60 usage(); | |
| 61 break; | |
| 62 case 'i': | |
| 63 if ((orig = fopen(optarg, "rb")) == NULL) { | |
| 64 fprintf(stderr, "%s: unable to open original image file %s\n", progname, optarg); | |
| 65 exit(1); | |
| 66 } | |
| 67 strcpy(orig_name, optarg); | |
| 68 break; | |
| 69 case 'm': | |
| 70 m = atoi(optarg); | |
| 71 if (m <= 0) { | |
| 72 fprintf(stderr, "%s: multiplication factor %d out of range\n", progname, m); | |
| 73 exit(1); | |
| 74 } | |
| 75 break; | |
| 76 case 'o': | |
| 77 if ((out = fopen(optarg, "w")) == NULL) { | |
| 78 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg); | |
| 79 exit(1); | |
| 80 } | |
| 81 strcpy(output_name, optarg); | |
| 82 break; | |
| 83 case 'p': | |
| 84 print_psnr = 1; | |
| 85 break; | |
| 86 case 'P': | |
| 87 print_psnr_only = 1; | |
| 88 break; | |
| 89 } | |
| 90 } | |
| 91 | |
| 92 argc -= optind; | |
| 93 argv += optind; | |
| 94 | |
| 95 if (argc > 1) { | |
| 96 usage(); | |
| 97 exit(1); | |
| 98 } | |
| 99 | |
| 8 | 100 if (argc == 1 && *argv[0] != '-') { |
| 0 | 101 if ((in = fopen(argv[0], "rb")) == NULL) { |
| 102 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]); | |
| 103 exit(1); | |
| 104 } | |
| 105 else | |
| 106 strcpy(input_name, argv[0]); | |
| 8 | 107 } |
| 108 | |
| 0 | 109 if (!orig) { |
| 110 fprintf(stderr, "%s: original image file not specified, use -i file option\n", progname); | |
| 111 exit(1); | |
| 112 } | |
| 113 | |
| 114 pgm_readpgminit(in, &in_cols, &in_rows, &in_maxval, &in_format); | |
| 115 | |
| 116 pgm_readpgminit(orig, &orig_cols, &orig_rows, &orig_maxval, &orig_format); | |
| 117 | |
| 118 if (in_cols != orig_cols || in_rows != orig_rows) { | |
| 119 fprintf(stderr, "%s: input image %s does not match dimensions of original image %s\n", progname, input_name, orig_name); | |
| 120 exit(1); | |
| 121 } | |
| 122 | |
| 8 | 123 cols = in_cols; |
| 124 rows = in_rows; | |
| 125 format = in_format; | |
| 126 maxval = in_maxval; | |
| 127 | |
| 0 | 128 if (cols % NJPEG) { |
| 129 fprintf(stderr, "%s: image width %d not a multiple of %d\n", progname, cols, NJPEG); | |
| 130 exit(1); | |
| 131 } | |
| 132 | |
| 133 if (rows % NJPEG) { | |
| 134 fprintf(stderr, "%s: image height %d not a multiple of %d\n", progname, rows, NJPEG); | |
| 135 exit(1); | |
| 136 } | |
| 137 | |
| 138 input_image = pgm_allocarray(cols, NJPEG); | |
| 139 orig_image = pgm_allocarray(cols, NJPEG); | |
| 140 | |
| 141 init_dct_8x8(); | |
| 142 input_dcts = alloc_coeffs_8x8(); | |
| 143 orig_dcts = alloc_coeffs_8x8(); | |
| 144 output = alloc_grays(cols, NJPEG); | |
| 145 | |
| 146 if (!print_psnr_only) | |
| 147 pgm_writepgminit(out, cols, rows, maxval, 0); | |
| 148 | |
| 149 for (row = 0; row < rows; row += NJPEG) { | |
| 150 | |
| 151 for (i = 0; i < NJPEG; i++) { | |
| 152 pgm_readpgmrow(in, input_image[row % NJPEG], cols, maxval, format); | |
| 153 pgm_readpgmrow(orig, orig_image[row % NJPEG], cols, maxval, format); | |
| 154 } | |
| 155 | |
| 156 for (col = 0; col < cols; col += NJPEG) { | |
| 157 fdct_block_8x8(input_image, col, 0, input_dcts); | |
| 158 fdct_block_8x8(orig_image, col, 0, orig_dcts); | |
| 159 | |
|
20
bd669312f068
suppress warnings, fix link errors
Peter Meerwald-Stadler <pmeerw@pmeerw.net>
parents:
8
diff
changeset
|
160 for (i = 0; i < NJPEG; i++) { |
|
bd669312f068
suppress warnings, fix link errors
Peter Meerwald-Stadler <pmeerw@pmeerw.net>
parents:
8
diff
changeset
|
161 for (j = 0; j < NJPEG; j++) { |
| 0 | 162 error += sqr(input_dcts[j][i + cols] - orig_dcts[j][i + cols]); |
| 163 output[j][i + col] = PIXELRANGE(fabs(input_dcts[j][i + cols] - orig_dcts[j][i + cols]) * m); | |
|
20
bd669312f068
suppress warnings, fix link errors
Peter Meerwald-Stadler <pmeerw@pmeerw.net>
parents:
8
diff
changeset
|
164 } |
|
bd669312f068
suppress warnings, fix link errors
Peter Meerwald-Stadler <pmeerw@pmeerw.net>
parents:
8
diff
changeset
|
165 } |
| 0 | 166 } |
| 167 | |
| 168 if (!print_psnr_only) { | |
| 169 for (i = 0; i < NJPEG; i++) | |
| 170 pgm_writepgmrow(out, output[i], cols, maxval, 0); | |
| 171 } | |
| 172 | |
| 173 } | |
| 174 fclose(in); | |
| 175 fclose(orig); | |
| 176 if (!print_psnr_only) | |
| 177 fclose(out); | |
| 178 | |
| 179 pgm_freearray(input_image, NJPEG); | |
| 180 pgm_freearray(orig_image, NJPEG); | |
| 181 free_coeffs(input_dcts); | |
| 182 free_coeffs(orig_dcts); | |
| 183 free_grays(output); | |
| 184 | |
| 185 if (print_psnr || print_psnr_only) { | |
| 186 double mse = error / (double) (cols * rows); | |
| 187 double rmse = sqrt(mse); | |
| 188 double psnr = 20.0 * log(255.0 / rmse) / log(10.0); | |
| 189 FILE *print = print_psnr_only ? out : stderr; | |
| 190 if (mse > 0.0) | |
| 191 fprintf(print, "PSNR: %lf dB\n", psnr); | |
| 192 else | |
| 193 fprintf(print, "PSNR: inf\n"); | |
| 194 fprintf(print, "RMS: %lf\n", rmse); | |
| 195 fprintf(print, "MSE: %lf\n", mse); | |
| 196 } | |
| 197 | |
| 198 exit(0); | |
| 199 } |