wm_bruyn_e.c

包含了多个matlab编程在图像中加入水印的处理代码

#include "wm.h"
#include "signature.h"
#include "coord.h"
#include "gray.h"
#include "sort.h"
#include "bruyn_common.h"
#include "pgm.h"

char *progname;

// prints out program's parameters
void usage(void) {
  fprintf(stderr, "usage: %s [-b n] [-h] [-k] [-n n] [-o file] [-pP n] [-q n] [-tT n] [-v n] -s file file\n", progname);
  fprintf(stderr, "\t-b n\t\tblock size\n");
  fprintf(stderr, "\t-h\t\tprint usage\n");
  fprintf(stderr, "\t-k\t\tdisable block skipping\n");
  fprintf(stderr, "\t-n n\t\tnumber of signature bits to embed\n");
  fprintf(stderr, "\t-o file\t\toutput (watermarked) file\n");
  fprintf(stderr, "\t-p n\t\tpattern type for zone 1\n");
  fprintf(stderr, "\t-P n\t\tpattern type for zone 2\n");
  fprintf(stderr, "\t-q n\t\tsignature strength\n");
  fprintf(stderr, "\t-s file\t\tsignature to embed in input image\n");
  fprintf(stderr, "\t-t n\t\tthreshold for noise\n");
  fprintf(stderr, "\t-T n\t\tthreshold for slope\n");
  fprintf(stderr, "\t-v n\t\tverbosity level\n");
  exit(0);
}

int main(int argc, char *argv[]) {
  FILE *in = stdin;
  FILE *out = stdout;
  FILE *sig = NULL;

  gray** image;
  gray **block;
  gray **zone;
  gray **category1, **category2;
  gray maxval;
  double *slope;
  int rows, cols, colors, format;
  int c;
  int i, j;
  int r;
  int n;
  int col, row;
  int bwidth, bheight;
  int n_block;
  int skipping = 0;

  char signature_name[MAXPATHLEN];
  char input_name[MAXPATHLEN] = "(stdin)";
  char output_name[MAXPATHLEN] = "(stdout)";

  double quality = 0.0;
  double threshold_noise = 0.0;
  double threshold_slope = 0.0;
  int pattern1 = 0;
  int pattern2 = 0;
  int blocksize = 0;
  int seed;

  int verbose = 0;

  struct coords *coords;

  progname = argv[0];

  pgm_init(&argc, argv); wm_init();

  // parse command line and set options
  while ((c = getopt(argc, argv, "b:h?n:o:p:P:q:s:t:T:v:k")) != EOF) {
    switch (c) {
      case 'k':  
        skipping = 1;
        break;
      case 'h':
      case '?':
        usage();
        break;
      case 'n':
        nbit_signature = atoi(optarg);
        if (nbit_signature <= 0 || nbit_signature > NBITSIGNATURE) {
          fprintf(stderr, "%s: invalid signature length %d\n", progname, nbit_signature);
          exit(1);
        }
        break;
      case 'o':
        if ((out = fopen(optarg, "wb")) == NULL) {
          fprintf(stderr, "%s: unable to open output file %s\n", progname, optarg);
          exit(1);
        }
        strcpy(output_name, optarg);
        break;
      case 'p':
        pattern1 = atoi(optarg);
        if (pattern1 <= 0 || pattern1 > NPATTERN) {
          fprintf(stderr, "%s: pattern type out of range\n", progname);
          exit(1);
        }
        break;
      case 'P':
        pattern2 = atoi(optarg);
        if (pattern2 <= 0 || pattern2 > 3) {
          fprintf(stderr, "%s: pattern type out of range\n", progname);
          exit(1);
        }
        break;
      case 'q':
        quality = atof(optarg);
        if (quality <= 0) {
          fprintf(stderr, "%s: quality factor %f out of range\n", progname, quality);
        }
        break;
      case 's':
        if ((sig = fopen(optarg, "r")) == NULL) {
          fprintf(stderr, "%s: unable to open signature file %s\n", progname, optarg);
          exit(1);
        }
        strcpy(signature_name, optarg);
        break;
      case 't':
        threshold_noise = atof(optarg);
        if (threshold_noise <= 0) {
          fprintf(stderr, "%s: noise threshold %f out of range\n", progname, threshold_noise);
        }
        break;
      case 'T':
        threshold_slope = atof(optarg);
        if (threshold_slope <= 0) {
          fprintf(stderr, "%s: slope threshold %f out of range\n", progname, threshold_slope);
        }
        break;
      case 'v':
        verbose = atoi(optarg);
        if (verbose < 0) {
          fprintf(stderr, "%s: verbosity level %d out of range\n",progname, verbose);
          exit(1);
        }
        break;
    }
  }

  argc -= optind;
  argv += optind;

  if (argc > 1) {
    usage();
    exit(1);
  }

  // open input image file or read from stdin
  if (argc == 1 && *argv[0] != '-')
    if ((in = fopen(argv[0], "rb")) == NULL) {
      fprintf(stderr, "%s: unable to open input file %s\n", progname, argv[0]);
      exit(1);
    }
    else
      strcpy(input_name, argv[0]);

  // read signature file and set options
  // command line options override signature file options
  if (sig) {
    char line[128];
    fgets(line, sizeof(line), sig);
    if (strspn(line, "BRSG") >= 4) {
      if (nbit_signature == 0)
        fscanf(sig, "%d\n", &nbit_signature);
      else
        fscanf(sig, "%*d\n");
      if (skipping == 0)
        fscanf(sig, "%d\n", &skipping);
      else
        fscanf(sig, "%*d\n");
      if (pattern1 == 0)
        fscanf(sig, "%d\n", &pattern1);
      else
        fscanf(sig, "%*d\n");
      if (pattern2 == 0)
        fscanf(sig, "%d\n", &pattern2);
      else
        fscanf(sig, "%*d\n");
      if (quality == 0.0)
        fscanf(sig, "%lf\n", &quality);
      else
        fscanf(sig, "%*lf\n");
      if (threshold_noise == 0.0)
        fscanf(sig, "%lf\n", &threshold_noise);
      else
        fscanf(sig, "%*lf\n");
      if (threshold_slope == 0.0)
        fscanf(sig, "%lf\n", &threshold_slope);
      else
        fscanf(sig, "%*lf\n");
      if (blocksize == 0)
        fscanf(sig, "%d\n", &blocksize);
      else
        fscanf(sig, "%*d\n");
      fscanf(sig, "%d\n", &seed);
      srandom(seed);
      n_signature = NBITSTOBYTES(nbit_signature);
      fread(signature, sizeof(char), n_signature, sig);
      fscanf(sig, "\n");
    }
    else {
      fprintf(stderr, "%s: invalid signature file %s\n", progname, signature_name);
      exit(1);
    }
    fclose(sig);
  }
  else {
    fprintf(stderr, "%s: signature file not specified, use -s file option\n", progname);
    exit(1);
  }

  if (pattern1 <= 0 || pattern2 <= 0 || pattern1 > NPATTERN || pattern2 > NPATTERN) {
    fprintf(stderr, "%s: invalid pattern type specified\n");
    exit(1);
  }

  // read dimensions of input image file
  pgm_readpgminit(in, &cols, &rows, &maxval, &format);

  // see if we can embed all signature bits
  // we want at least half of the blocks untouched
  if (((rows / blocksize) * (cols / blocksize)) < nbit_signature / 2) {
    fprintf(stderr, "%s: image not large enough to embed %d bits of signature\n", progname, nbit_signature);
    exit(1);
  }
  n_block = blocksize * blocksize;

  // allocate structure to remember which blocks we already touched,
  // allow plenty of room to skip over blocks
  if ((coords = alloc_coords(nbit_signature * 2)) == NULL) {
    fprintf(stderr, "%s: unable to allocate memory\n", progname);
    exit(1);
  }

  // read in input image file
  image = pgm_allocarray(cols, rows);
  for (row = 0; row < rows; row++)
    pgm_readpgmrow(in, image[row], cols, maxval, format);

  fclose(in);

  row = 0;
  col = 0;

  // allocate memory for one block
  block = alloc_grays(blocksize, blocksize);

  // allocate memory for zone classification
  zone = alloc_grays(blocksize, blocksize);

  // allocate memory for category classification
  category1 = alloc_grays(blocksize, blocksize);
  category2 = alloc_grays(blocksize, blocksize);

  // set up category classification array according to 
  // pattern type parameter
  for (i = 0; i < blocksize; i++)
    for (j = 0; j < blocksize; j++) {
      category1[j][i] = lookup_pattern(pattern1, i, j);
      category2[j][i] = lookup_pattern(pattern2, i, j);
    }

  // allocate memory for slope calculation
  slope = malloc(sizeof(double) * n_block);

  // embed all the signature bits, one by one
  n = 0;
  while (n < nbit_signature) {
    int xb;
    int yb;
    int blocktype;
    double smax;
    int alpha, beta_minus, beta_plus;