annotate Meerwald/wm_zhu_e.c @ 1:647ab0f05aae v0.4

drop, not needed
author Peter Meerwald <pmeerw@cosy.sbg.ac.at>
date Tue, 14 Aug 2007 19:58:25 +0200
parents be303a3f5ea8
children acb6967ee76d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
1 #include "wm.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
2 #include "dwt.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
3 #include "pgm.h"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
4 #include "sort.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:
diff changeset
9 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);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
10 fprintf(stderr, "\t-a n\t\talpha factor/embedding strength\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
11 fprintf(stderr, "\t-e n\t\twavelet filtering method\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
12 fprintf(stderr, "\t-f n\t\tfilter number\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
13 fprintf(stderr, "\t-F file\t\tfilter definition file\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
14 fprintf(stderr, "\t-h\t\tprint usage\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
15 fprintf(stderr, "\t-l n\t\tdecomposition level\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
16 fprintf(stderr, "\t-o file\t\toutput (watermarked) file\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
17 fprintf(stderr, "\t-s file\t\tsignature to embed in input image\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
18 fprintf(stderr, "\t-v n\t\tverbosity level\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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19 exit(0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
20 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
21
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
22 int main(int argc, char *argv[]) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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23
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
24 FILE *in = stdin;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
25 FILE *out = stdout;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
26 FILE *sig = NULL;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
27
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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28 char output_name[MAXPATHLEN] = "(stdout)";
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
29 char input_name[MAXPATHLEN] = "(stdin)";
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
30 char signature_name[MAXPATHLEN];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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31
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
32 int i, c, w;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
33 int row, col;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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34
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
35 int n;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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36
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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37 double alpha = 0.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
38 int level = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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39
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
40 int filter = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
41 int method = -1;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
42 int levels;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
43 char filter_name[MAXPATHLEN] = "";
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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44
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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45 int verbose = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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46
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
47 gray **image;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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48 Image_tree p, dwts;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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49
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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50 gray maxval;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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51 int rows, cols, colors, format;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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52
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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53 double *watermark;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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54
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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55 progname = argv[0];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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56
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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57 pgm_init(&argc, argv); wm_init();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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58
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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59 while ((c = getopt(argc, argv, "a:e:f:F:h?o:l:s:v:")) != EOF) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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60 switch (c) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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61 case 'a':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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62 alpha = atof(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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63 if (alpha <= 0.0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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64 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha);
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 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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68 case 'l':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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69 level = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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70 if (level <= 0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
71 fprintf(stderr, "%s: decomposition level %d out of range\n", progname, level);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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72 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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73 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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74 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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75 case 'e':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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76 method = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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77 if (method < 0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
78 fprintf(stderr, "%s: wavelet filtering method %d out of range\n", progname, method);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
79 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
80 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
81 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
82 case 'f':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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83 filter = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
84 if (filter <= 0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
85 fprintf(stderr, "%s: filter number %d out of range\n", progname, filter);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
86 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
87 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
88 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
89 case 'F':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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90 strcpy(filter_name, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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91 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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92 case 'h':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
93 case '?':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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94 usage();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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95 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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96 case 'o':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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97 if ((out = fopen(optarg, "wb")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
98 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
99 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
100 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
101 strcpy(output_name, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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102 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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103 case 's':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
104 if ((sig = fopen(optarg, "r")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
105 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
106 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
107 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
108 strcpy(signature_name, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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109 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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110 case 'v':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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111 verbose = atoi(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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112 if (verbose < 0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
113 fprintf(stderr, "%s: verbosity level %d out of range\n", progname, verbose);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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114 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
115 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
116 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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117 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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118 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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119
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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120 argc -= optind;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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121 argv += optind;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
122
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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123 if (argc > 1) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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124 usage();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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125 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
126 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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127
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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128 if (argc == 1 && *argv[0] != '-')
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
129 if ((in = fopen(argv[0], "rb")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
130 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
131 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
132 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
133 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
134 strcpy(input_name, argv[0]);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
135
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
136 if (sig) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
137 char line[32];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
138 fgets(line, sizeof(line), sig);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
139 if (strspn(line, "ZHSG") >= 4) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
140 fscanf(sig, "%d\n", &n);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
141 if (alpha == 0.0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
142 fscanf(sig, "%lf\n", &alpha);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
143 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
144 fscanf(sig, "%*lf\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
145 if (level == 0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
146 fscanf(sig, "%d\n", &level);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
147 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
148 fscanf(sig, "%*d\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
149 if (method < 0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
150 fscanf(sig, "%d\n", &method);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
151 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
152 fscanf(sig, "%*d\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
153 if (filter == 0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
154 fscanf(sig, "%d\n", &filter);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
155 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
156 fscanf(sig, "%*d\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
157 if (!strcmp(filter_name, ""))
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
158 fscanf(sig, "%[^\n\r]\n", &filter_name);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
159 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
160 fscanf(sig, "%*[^\n\r]\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
161 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
162 else {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
163 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
164 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
165 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
166 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
167 else {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
168 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
169 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
170 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
171
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
172 watermark = malloc(n * sizeof(double));
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
173 for (i = 0; i < n; i++)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
174 fscanf(sig, "%lf\n", &watermark[i]);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
175 fclose(sig);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
176
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
177 pgm_readpgminit(in, &cols, &rows, &maxval, &format);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
178 image = pgm_allocarray(cols, rows);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
179 for (row = 0; row < rows; row++)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
180 pgm_readpgmrow(in, image[row], cols, maxval, format);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
181 fclose(in);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
182
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
183 // complete decomposition
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
184 levels = find_deepest_level(cols, rows) - 1;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
185 if (level > levels) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
186 fprintf(stderr, "%s: decomposition level %d not possible (max. %d), image size is %d x %d\n", progname, level, levels, cols, rows);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
187 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
188 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
189
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
190 // wavelet transform
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
191 init_dwt(cols, rows, filter_name, filter, level, method);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
192 #ifdef POLLEN_STUFF
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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193 #include "pollen_stuff.xxx"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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194 #endif
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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195 #ifdef PARAM_STUFF
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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196 #include "param_stuff.xxx"
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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197 #endif
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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198
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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199 dwts = fdwt(image);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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200
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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201 p = dwts;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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202 while (p->coarse) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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203 double *collected_coeffs, *largest;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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204 int subband_size = p->horizontal->image->size;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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205 int maxselect = MIN(3 * subband_size, n + 1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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206 double threshold;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
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207
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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208 // allocate memory for coefficient vector
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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209 collected_coeffs = malloc(3 * subband_size * sizeof(double));
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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210 if (!collected_coeffs) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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211 fprintf(stderr, "%s: malloc() failed\n", progname);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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212 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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213 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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214
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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215 // collect coefficients from all subbands of one level into one vector
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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216 for (i = 0; i < subband_size; i++) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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217 collected_coeffs[3 * i + 0] = p->horizontal->image->data[i];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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218 collected_coeffs[3 * i + 1] = p->vertical->image->data[i];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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219 collected_coeffs[3 * i + 2] = p->diagonal->image->data[i];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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220 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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221
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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222 // allocate memory for largest coefficients
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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223 largest = malloc(maxselect * sizeof(double));
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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224 if (!largest) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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225 fprintf(stderr, "%s: malloc() failed\n", progname);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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226 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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227 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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228
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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229 // select largest coefficients (involves sorting)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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230 select_largest_coeffs(collected_coeffs, 3 * subband_size, maxselect, largest);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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231 // threshold is the smallest of the largest coefficients
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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232 threshold = largest[0];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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233 free(largest);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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234 free(collected_coeffs);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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235
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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236 w = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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237 for (i = 0; i < subband_size && w < n; i++) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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238 if (p->horizontal->image->data[i] > threshold)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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239 p->horizontal->image->data[i] *= (1.0 + alpha * watermark[w++]);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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240 if (p->vertical->image->data[i] > threshold)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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241 p->vertical->image->data[i] *= (1.0 + alpha * watermark[w++]);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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242 if (p->diagonal->image->data[i] > threshold)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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243 p->diagonal->image->data[i] *= (1.0 + alpha * watermark[w++]);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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244 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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245
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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246 p = p->coarse;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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247 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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248
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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249 free(watermark);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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250 idwt(dwts, image);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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251
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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252 pgm_writepgminit(out, cols, rows, maxval, 0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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253 for (row = 0; row < rows; row++)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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254 pgm_writepgmrow(out, image[row], cols, maxval, 0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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255 fclose(out);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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256
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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257 pgm_freearray(image, rows);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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258
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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259 exit(0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
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260 }

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