annotate Meerwald/wm_cox_e.c @ 15:ad1d224896c5

fix scanf() warning
author Peter Meerwald <pmeerw@cosy.sbg.ac.at>
date Mon, 30 Jun 2008 20:59:01 +0200
parents f83ef905a63d
children 4987db85cfae
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 "dct.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:
diff changeset
5
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
6 char *progname;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
7
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
8 void usage(void) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
9 fprintf(stderr, "usage: %s [-a n] [-h] [-o file] -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-h\t\tprint usage\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
12 fprintf(stderr, "\t-o file\t\toutput (watermarked) file\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
13 fprintf(stderr, "\t-s file\t\tsignature to embed in input image\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
14 exit(0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
15 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
16
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
17 int main(int argc, char *argv[]) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
18
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
19 FILE *in = stdin;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
20 FILE *out = stdout;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
21 FILE *sig = NULL;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
22
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
23 char output_name[MAXPATHLEN] = "(stdout)";
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
24 char input_name[MAXPATHLEN] = "(stdin)";
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
25 char signature_name[MAXPATHLEN];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
26
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
27 int c;
8
f83ef905a63d fixing many warnings
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 0
diff changeset
28 int row;
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
29 int i,j;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
30
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
31 int n;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
32
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
33 double alpha = 0.0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
34 double threshold;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
35
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
36 double *largest;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
37 gray **input_image;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
38 gray **output_image;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
39 double **dcts;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
40
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
41 gray maxval;
8
f83ef905a63d fixing many warnings
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 0
diff changeset
42 int rows, cols, format;
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
43
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
44 progname = argv[0];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
45
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
46 pgm_init(&argc, argv); wm_init();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
47
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
48 while ((c = getopt(argc, argv, "a:h?o:s:")) != EOF) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
49 switch (c) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
50 case 'a':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
51 alpha = atof(optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
52 if (alpha <= 0.0) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
53 fprintf(stderr, "%s: alpha factor %f out of range\n", progname, alpha);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
54 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
55 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
56 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
57 case 'h':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
58 case '?':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
59 usage();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
60 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
61 case 'o':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
62 if ((out = fopen(optarg, "wb")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
63 fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
64 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
65 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
66 strcpy(output_name, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
67 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
68 case 's':
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
69 if ((sig = fopen(optarg, "r")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
70 fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
71 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
72 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
73 strcpy(signature_name, optarg);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
74 break;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
75 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
76 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
77
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
78 argc -= optind;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
79 argv += optind;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
80
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
81 if (argc > 1) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
82 usage();
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
83 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
84 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
85
8
f83ef905a63d fixing many warnings
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 0
diff changeset
86 if (argc == 1 && *argv[0] != '-') {
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
87 if ((in = fopen(argv[0], "rb")) == NULL) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
88 fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
89 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
90 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
91 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
92 strcpy(input_name, argv[0]);
8
f83ef905a63d fixing many warnings
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 0
diff changeset
93 }
f83ef905a63d fixing many warnings
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents: 0
diff changeset
94
0
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
95 if (sig) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
96 char line[32];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
97 fgets(line, sizeof(line), sig);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
98 if (strspn(line, "CXSG") >= 4) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
99 fscanf(sig, "%d\n", &n);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
100 if (alpha == 0.0)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
101 fscanf(sig, "%lf\n", &alpha);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
102 else
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
103 fscanf(sig, "%*lf\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
104 fscanf(sig, "%*lf\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
105 fscanf(sig, "%*lf\n");
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
106 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
107 else {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
108 fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
109 exit(1);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
110 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
111 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
112 else {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
113 fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
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
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
117 pgm_readpgminit(in, &cols, &rows, &maxval, &format);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
118
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
119 init_dct_NxN(cols, rows);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
120
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
121 dcts = alloc_coeffs(cols, rows);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
122 input_image = pgm_allocarray(cols, rows);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
123
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
124 for (row = 0; row < rows; row++)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
125 pgm_readpgmrow(in, input_image[row], cols, maxval, format);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
126
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
127 fclose(in);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
128
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
129 output_image = pgm_allocarray(cols, rows);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
130
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
131 fdct_NxN(input_image, dcts);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
132
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
133 largest = malloc((n + 1) * sizeof(double));
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
134 select_largest_coeffs(dcts[0], cols * rows, n+1, largest);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
135 threshold = largest[0];
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
136 free(largest);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
137
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
138 j = 0;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
139 for (i = 0; i < n; i++) {
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
140 double v;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
141
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
142 while (dcts[j / cols][j % cols] < threshold) j++;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
143
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
144 fscanf(sig, "%lf\n", &v);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
145 dcts[j / cols][j % cols] *= (1.0 + alpha * v);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
146 j++;
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
147 }
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
148
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
149 idct_NxN(dcts, output_image);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
150 free_coeffs(dcts);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
151
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
152 pgm_writepgminit(out, cols, rows, maxval, 0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
153
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
154 for (row = 0; row < rows; row++)
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
155 pgm_writepgmrow(out, output_image[row], cols, maxval, 0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
156
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
157 fclose(out);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
158
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
159 fclose(sig);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
160
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
161 pgm_freearray(output_image, rows);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
162 pgm_freearray(input_image, rows);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
163
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
164 exit(0);
Peter Meerwald <pmeerw@cosy.sbg.ac.at>
parents:
diff changeset
165 }

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