annotate Meerwald/wm_xie2_d.c @ 21:1c4ccd635a68 v0.6

ignore *.swp
author Peter Meerwald-Stadler <pmeerw@pmeerw.net>
date Sat, 28 Jan 2023 23:57:40 +0100
parents 4987db85cfae
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
3
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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1 #include "wm.h"
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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2 #include "signature.h"
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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3 #include "dwt.h"
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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4 #include "pgm.h"
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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5
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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6 char *progname;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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7
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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8 // inverse watermarking transformation, extract embedded bit, check quantization boundaries
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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9 double wm_transform(int quant, double f1, double f2, double f3) {
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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10 double s = (fabs(f3) - fabs(f1)) / (double) quant;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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11 double l = f1;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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12 int x;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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13
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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14 x = 0;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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15 while (l < f2) {
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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16 l += s;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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17 x++;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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18 }
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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19
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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20 if (fabs(l - s - f2) < fabs(l-f2))
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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21 return (x+1) % 2;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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22 else
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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23 return (x) % 2;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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24 }
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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25
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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26 void usage(void) {
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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27 fprintf(stderr, "usage: %s [-a n] [-e n] [-f n] [-F n] [-h] [-l n] [-o file] [-v n] -s file file\n\n", progname);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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28 fprintf(stderr, "\t-a n\t\tembedding strength (default 0.05)\n");
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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29 fprintf(stderr, "\t-e n\t\twavelet filtering method\n");
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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30 fprintf(stderr, "\t-f n\t\tfilter number\n");
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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31 fprintf(stderr, "\t-F file\t\tfilter definition file\n");
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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32 fprintf(stderr, "\t-l n\t\tembedding level\n");
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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33 fprintf(stderr, "\t-h\t\tprint usage\n");
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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34 fprintf(stderr, "\t-o file\t\textracted signature file\n");
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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35 fprintf(stderr, "\t-q n\t\tquantization level\n");
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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36 fprintf(stderr, "\t-s file\t\tsignature to embed in input image\n");
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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37 fprintf(stderr, "\t-v n\t\tverbosity level\n");
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38 exit(0);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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39 }
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40
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41 int main(int argc, char *argv[]) {
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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42
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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43 FILE *in = stdin;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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44 FILE *out = stdout;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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45 FILE *sig = NULL;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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46
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47 char output_name[MAXPATHLEN] = "(stdout)";
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48 char input_name[MAXPATHLEN] = "(stdin)";
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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49 char signature_name[MAXPATHLEN];
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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50
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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51 int c, n;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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52 int row, col;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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53
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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54 double alpha = 0.0;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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55 int quant = 0;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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56 int filter = 0;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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57 int method = -1;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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58 int level = 0;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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59 char filter_name[MAXPATHLEN] = "";
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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60
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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61 int seed;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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62 int verbose = 0;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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63
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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64 gray **image;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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65 Image_tree dwts, p;
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66
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67 gray maxval;
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68 int rows, cols, format;
3
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69
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70 progname = argv[0];
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71
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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72 pgm_init(&argc, argv); wm_init2();
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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73
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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74 while ((c = getopt(argc, argv, "a:e:f:F:h?l:o:s:v:q:")) != EOF) {
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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75 switch (c) {
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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76 case 'e':
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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77 method = atoi(optarg);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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78 if (method < 0) {
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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79 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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80 exit(1);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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81 }
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82 break;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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83 case 'f':
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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84 filter = atoi(optarg);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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85 if (filter <= 0) {
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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86 fprintf(stderr, "%s: filter number %d out of range\n", progname, filter);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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87 exit(1);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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88 }
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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89 break;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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90 case 'F':
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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91 strcpy(filter_name, optarg);
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92 break;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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93 case 'h':
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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94 case '?':
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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95 usage();
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96 break;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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97 case 'l':
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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98 level = atoi(optarg);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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99 if (level < 1) {
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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100 fprintf(stderr, "%s: embedding level out of range\n", progname);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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101 exit(1);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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102 }
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103 break;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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104 case 'o':
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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105 if ((out = fopen(optarg, "wb")) == NULL) {
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parents:
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106 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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107 exit(1);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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108 }
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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109 strcpy(output_name, optarg);
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110 break;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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111 case 'q':
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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112 quant = atoi(optarg);
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113 break;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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114 case 'a':
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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115 alpha = atof(optarg);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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116 if (alpha <= 0.0) {
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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117 fprintf(stderr, "%s: embedding strength factor %f out of range\n", progname, alpha);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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118 exit(1);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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119 }
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120 break;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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121 case 's':
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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122 if ((sig = fopen(optarg, "r")) == NULL) {
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123 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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124 exit(1);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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125 }
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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126 strcpy(signature_name, optarg);
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127 break;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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128 case 'v':
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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129 verbose = atoi(optarg);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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130 if (verbose < 0) {
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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131 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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132 exit(1);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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133 }
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134 break;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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135 }
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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136 }
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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137
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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138 argc -= optind;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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139 argv += optind;
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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140
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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141 if (argc > 1) {
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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142 usage();
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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143 exit(1);
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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144 }
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Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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145
8
f83ef905a63d fixing many warnings
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 3
diff changeset
146 if (argc == 1 && *argv[0] != '-') {
3
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
147 if ((in = fopen(argv[0], "rb")) == NULL) {
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
148 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
149 exit(1);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
150 }
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
151 else
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
152 strcpy(input_name, argv[0]);
8
f83ef905a63d fixing many warnings
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 3
diff changeset
153 }
3
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
154
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
155 if (sig) {
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
156 char line[32];
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
157 fgets(line, sizeof(line), sig);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
158 if (strspn(line, "XE2SG") >= 5) {
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
159 fscanf(sig, "%d\n", &nbit_signature);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
160 if (alpha == 0.0)
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
161 fscanf(sig, "%lf\n", &alpha);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
162 else
16
4987db85cfae fix another scanf() warning
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 15
diff changeset
163 fscanf(sig, "%*f\n");
3
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
164 if (method < 0)
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
165 fscanf(sig, "%d\n", &method);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
166 else
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
167 fscanf(sig, "%*d\n");
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
168 if (filter == 0)
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
169 fscanf(sig, "%d\n", &filter);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
170 else
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
171 fscanf(sig, "%*d\n");
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
172 if (!strcmp(filter_name, ""))
15
ad1d224896c5 fix scanf() warning
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 8
diff changeset
173 fscanf(sig, "%[^\n\r]\n", filter_name);
3
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
174 else
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
175 fscanf(sig, "%*[^\n\r]\n");
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
176 if (quant == 0)
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
177 fscanf(sig, "%d\n", &quant);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
178 else
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
179 fscanf(sig, "%*d\n");
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
180 if (level == 0)
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
181 fscanf(sig, "%d\n", &level);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
182 else
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
183 fscanf(sig, "%*d\n");
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
184 fscanf(sig, "%d\n", &seed);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
185 srandom(seed);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
186 n_signature = NBITSTOBYTES(nbit_signature);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
187 fread(signature, sizeof(char), n_signature, sig);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
188 fscanf(sig, "\n");
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
189 }
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
190 else {
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
191 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
192 exit(1);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
193 }
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
194 fclose(sig);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
195 }
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
196 else {
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
197 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
198 exit(1);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
199 }
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
200
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
201 pgm_readpgminit(in, &cols, &rows, &maxval, &format);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
202 if (verbose > 0)
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
203 fprintf(stderr, "%s: embedding %d bits with strength %d in\n"
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
204 " %d x %d host image, decomposition level %d\n",
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
205 progname, nbit_signature, quant, cols, rows, level);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
206
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
207 image = pgm_allocarray(cols, rows);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
208 for (row = 0; row < rows; row++)
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
209 pgm_readpgmrow(in, image[row], cols, maxval, format);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
210 fclose(in);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
211
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
212 // decomposition of image
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
213 init_dwt(cols, rows, filter_name, filter, level, method);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
214 #ifdef POLLEN_STUFF
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
215 #include "pollen_stuff.c"
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
216 #endif
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
217 #ifdef PARAM_STUFF
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
218 #include "param_stuff.c"
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
219 #endif
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
220
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
221 dwts = fdwt(image);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
222
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
223 p = dwts;
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
224
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
225 // consider each resolution level
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
226 while (p->level < level)
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
227 // descend one level
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
228 p = p->coarse;
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
229
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
230 // repeat binary watermark by sliding a 3-pixel window of approximation image
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
231 n = 0;
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
232 for (row = 0; row < p->image->height; row++) {
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
233 col = 0;
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
234 while (col < p->image->width - 3) {
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
235 double b1, b2, b3;
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
236 double *f1 = &b1, *f2 = &b2, *f3 = &b3;
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
237
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
238 // get all three approximation pixels in window
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
239 b1 = get_pixel(p->image, col + 0, row);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
240 b2 = get_pixel(p->image, col + 1, row);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
241 b3 = get_pixel(p->image, col + 2, row);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
242
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
243 // bring selected pixels in ascending order
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
244 #define SWAP(A, B) {double *t = A; A = B; B = t;}
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
245 if (*f1 > *f2) SWAP(f1, f2);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
246 if (*f2 > *f3) SWAP(f2, f3);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
247 if (*f1 > *f2) SWAP(f1, f2);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
248
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
249 set_signature_bit(n, wm_transform(quant, *f1, *f2, *f3));
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
250
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
251 if (verbose > 1)
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
252 fprintf(stderr, "%s: extracting #%d (= %d) at (%d/%d); %f < %f < %f\n",
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
253 progname, n, get_signature_bit(n % nbit_signature), col, row, *f1, *f2, *f3);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
254
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
255 n++;
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
256 col += 3;
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
257 col += (2.0 / alpha);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
258 }
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
259 }
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
260
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
261 fprintf(out, "XE2WM\n");
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
262 fprintf(out, "%d\n", n);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
263 fwrite(signature, sizeof(char), NBITSTOBYTES(n), out);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
264 fprintf(out, "\n");
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
265 fclose(out);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
266
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
267 pgm_freearray(image, rows);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
268
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
269 exit(0);
acb6967ee76d update to 0.5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
270 }

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