int main(int argc, char *argv[]) {
struct timeval t1, t2, tr;
double elapsedTime = 0;
if(argc<2) {
printf("./dwt3d input.dat [level]");
return -1;
}
char* fname = argv[1];
char fname_out[50] = "dwt3d_out.dat";
int level = 1;
if (argc>2)
level = atoi(argv[2]);
int m, n, p;
int i;
float *img;
float *tmp;
// read the 3D image binary
FILE* fin = fopen(fname, "rb");
fread(&m, 1, sizeof(int), fin);
fread(&n, 1, sizeof(int), fin);
fread(&p, 1, sizeof(int), fin);
img = (float*)calloc(n*m*p, sizeof(float));
tmp = (float*)calloc(n*m*p, sizeof(float));
fread (img, n*m*p, sizeof(float), fin);
fclose(fin);
gettimeofday(&t1, NULL);
// 3D DWT transform, which is 2D DWT for each image slices
//omp_set_num_threads(8);
#pragma omp parallel for private(i)
for (i=0; i<p; i++)
cdf97(img+i*n*m, tmp+i*n*m, m, n, level);
gettimeofday(&t2, NULL);
timersub(&t1, &t2, &tr);
printf("Execute time: %.2f sec\n", fabs(tr.tv_sec+(double)tr.tv_usec/1000000.0));
FILE* fout = fopen(fname_out, "wb+");
fwrite(&m, sizeof(int), 1, fout);
fwrite(&n, sizeof(int), 1, fout);
fwrite(&p, sizeof(int), 1, fout);
fwrite(img, sizeof(float), n*m*p, fout);
fclose(fout);
free(img);
free(tmp);
return 0;
}
int main(int argc, char *argv[]) {
struct timeval t1, t2, tr;
double elapsedTime = 0;
if(argc<2) {
printf("./dwt3d input.dat [level]");
return -1;
}
char* fname = argv[1];
char fname_out[50] = "dwt3d_out.dat";
int level = 1;
if (argc>2)
level = atoi(argv[2]);
int m, n, p;
int i;
float *img;
float *tmp;
// read the 3D image binary
FILE* fin = fopen(fname, "rb");
fread(&m, 1, sizeof(int), fin);
fread(&n, 1, sizeof(int), fin);
fread(&p, 1, sizeof(int), fin);
img = (float*)calloc(n*m*p, sizeof(float));
tmp = (float*)calloc(n*m*p, sizeof(float));
#pragma omp parallel for schedule(static, 4)
for (i = 0; i < p; i++)
{
FILE* fin = fopen(fname, "rb");
fseek (fin, 12 + sizeof(float) * n * m * i, SEEK_SET);
fread (img + i * n * m, n * m, sizeof(float), fin);
fclose(fin);
}
gettimeofday(&t1, NULL);
// 3D DWT transform, which is 2D DWT for each image slices
#pragma omp parallel for schedule(static, 4)
for (i=0; i<p; i++)
{
cdf97(img+i*n*m, tmp+i*n*m, m, n, level);
}
gettimeofday(&t2, NULL);
timersub(&t1, &t2, &tr);
printf("Execute time: %.3f sec\n", fabs(tr.tv_sec+(double)tr.tv_usec/1000000.0));
free(img);
free(tmp);
return 0;
}
int main(int argc, char *argv[]) {
struct timeval t1, t2, tr;
double elapsedTime = 0;
if(argc<2) {
printf("./dwt2d input.bmp [level]");
return -1;
}
char* fname = argv[1];
char fname_out[50] = "dwt_out.bmp";
int level = 1;
if (argc>2)
level = atoi(argv[2]);
int N1;
int N2;
int i, j;
float *img;
float *tmp;
// read image from a BMP file
int err = imread(&img, &N1, &N2, fname);
if (err != 0) return err;
tmp = (float*)calloc(N1*N2, sizeof(float));
gettimeofday(&t1, NULL);
// start 2D DWT transform
cdf97(img, tmp, N1, N2, level);
gettimeofday(&t2, NULL);
timersub(&t1, &t2, &tr);
printf("Execute time: %.2f sec\n", fabs(tr.tv_sec+(double)tr.tv_usec/1000000.0));
// write an BMP image
imwrite(img, N1, N2, fname_out);
free(img);
free(tmp);
return 0;
}