void mexFunction(int nlhs,mxArray *plhs[],int nrhs,const mxArray *prhs[])
{
DOUBLE *sig,*wcp,*tmp;
mxArray *temp;
unsigned int m,n;
int nr,nc,nn,J;
/* Check for proper number of arguments */
if (nrhs != 1) {
mexErrMsgTxt("dct_ii requires one input argument.");
} else if (nlhs != 1) {
mexErrMsgTxt("dct_ii requires one output argument.");
}
/* Check the dimensions of signal. signal can be n X 1 or 1 X n. */
/* future enhancement -- vectorize, do each column of matrix */
m = mxGetM(Sig_IN);
n = mxGetN(Sig_IN);
if(m == 1){
nr = (int) n;
nc = 1;
} else {
nr = (int) m;
nc = (int) n;
}
J = 0;
for( nn = 1; nn < nr; nn *= 2 )
J ++;
if( nn != nr){
mexErrMsgTxt("dct_ii requires dyadic length");
}
/* Create a matrix for the return argument */
DCT_OUT = mxCreateDoubleMatrix(m, n, mxREAL);
temp = mxCreateDoubleMatrix(4*n,1,mxREAL);
/* Assign pointers to the various parameters */
wcp = mxGetPr(DCT_OUT);
sig = mxGetPr(Sig_IN);
tmp = mxGetPr(temp);
copydouble(sig,tmp,nr);
/* Do the actual computations in a subroutine */
dct(&tmp[0],&tmp[nr],J,&tmp[2*nr]);
copydouble(tmp,wcp,nr);
mxDestroyArray(temp);
}
/**
* @brief Perform forward DWT (periodic boundaries) on 3D data.
*
* @param sig Signal to be transformed.
* @param res Decomposed signal.
*/
void
dpwt3 (const Matrix <T> & sig, Matrix <T> & res)
{
// assign signal to result matrix
res = sig;
# pragma omp parallel default (shared), num_threads (_num_threads)
{
T * wcplo, * wcphi, * templo, * temphi, * tmp;
size_t stride;
int sl1 = _sl1,
sl2 = _sl2,
sl3 = _sl3;
const int t_num = omp_get_thread_num ();
// loop over levels of DWT
for (int j = (_max_level-1); j >= _min_level; --j)
{
// update stride
stride = sl1 * t_num;
// update thread's temporary memory address
tmp = & _temp [stride];
# pragma omp for schedule (OMP_SCHEDULE)
// loop over lines along first dimension ('columns') of image
for (int c2_loc = 0; c2_loc < sl2 * sl3; c2_loc++)
{
int c2_glob = (c2_loc / sl2) * _sl1 * _sl2 + (c2_loc % sl2) * _sl1;
// access to lowpass part of DWT
wcplo = & res [c2_glob /** _sl1*/];
// access to highpass part of DWT
wcphi = & res [c2_glob /** _sl1*/ + sl1 / 2];
// copy part of image to _temp memory
copydouble (wcplo, tmp, sl1);
// apply low pass filter on current line and write to result matrix
downlo (tmp, sl1, wcplo);
// apply high pass filter on current line and write to result matrix
downhi (tmp, sl1, wcphi);
} // loop over lines along first dimension
// update stride
stride = 2 * sl2 * t_num;
// update thread's temporary memory address
tmp = & _temp [stride];
templo = & _temp [ sl2 + stride];
temphi = & _temp [1.5 * sl2 + stride];
# pragma omp for schedule (OMP_SCHEDULE)
// loop over lines along second dimension ('rows') of image
for (int c1_loc = 0; c1_loc < sl1 * sl3; c1_loc++)
{
int c1_glob = (c1_loc / sl1) * _sl1 * _sl2;
// copy c1-th line of image to temp_mem
unpackdouble (& res [c1_glob], sl2, _sl1, c1_loc % sl1, tmp);
// apply low pass filter on current line and write to _temp mem
downlo (tmp, sl2, templo);
// apply high pass filter on current line and write to _temp mem
downhi (tmp, sl2, temphi);
// write temp lowpass result to result matrix
packdouble (templo, sl2 / 2, _sl1, c1_loc % sl1, & res [c1_glob]);
// write temp highpass result to result matrix
packdouble (temphi, sl2 / 2, _sl1, c1_loc % sl1, & res [c1_glob + sl2 / 2 * _sl1]);
} // loop over lines along second dimension
// update stride
stride = 2 * sl3 * t_num;
// update thread's temporary memory address
tmp = & _temp [stride];
templo = & _temp [ sl3 + stride];
temphi = & _temp [1.5 * sl3 + stride];
# pragma omp for schedule (OMP_SCHEDULE)
// loop over lines along third dimension ('third') of image
for (int c1_loc = 0; c1_loc < sl1 * sl2; c1_loc++)
{
int c1_glob = (c1_loc % sl1) + (c1_loc / sl1) * _sl1;
// copy c2-th line of image to temp_mem
unpackdouble (& res [c1_glob], sl3, _ld12, 0, tmp);
// apply low pass filter on current line and write to _temp mem
downlo (tmp, sl3, templo);
// apply high pass filter on current line and write to _temp mem
downhi (tmp, sl3, temphi);
// write temp lowpass result to result matrix
packdouble (templo, sl3 / 2, _ld12, 0, & res [c1_glob]);
// write temp highpass result to result matrix
packdouble (temphi, sl3 / 2, _ld12, 0, & res [c1_glob + sl3 / 2 * _ld12]);
} // loop over lines along third dimension
// reduce dimensions for next level
sl1 /= 2;
sl2 /= 2;
sl3 /= 2;
} // loop over levels of DWT
} // omp parallel
}
/**
* @brief Perform inverse DWT (periodic boundaries) on 3D data.
*
* @param wc Wavelet presentation of 3D data.
* @param img Reconstructed signal.
*/
void
idpwt3 (const Matrix <T> & wc, Matrix <T> & img)
{
// assign dwt to result image
img = wc;
# pragma omp parallel default (shared) num_threads (_num_threads)
{
T * wcplo, * wcphi, * templo, * temphi, * temptop, * tmp;
size_t stride;
int sl1 = _sl1_scale,
sl2 = _sl2_scale,
sl3 = _sl3_scale;
const int t_num = omp_get_thread_num ();
// loop over levels of backwards DWT
for (int j = _min_level; j < _max_level; j++)
{
// update stride
stride = 6 * sl3 * t_num;
tmp = & _temp [stride];
templo = & _temp [2 * sl3 + stride];
temphi = & _temp [3 * sl3 + stride];
temptop = & _temp [4 * sl3 + stride];
# pragma omp for schedule (OMP_SCHEDULE)
// loop over lines along third dimension ('third') of result image
for (int c1_loc = 0; c1_loc < 2 * sl1 * 2 * sl2; c1_loc++)
{
int c1_glob = (c1_loc % (2 * sl1)) + (c1_loc / (2 * sl1)) * _sl1;
// copy lowpass part of current line to temporary memory
unpackdouble (& img [c1_glob], sl3, _ld12, 0, templo);
// copy highpass part of current line to temporary memory
unpackdouble (& img [c1_glob + sl3 * _ld12], sl3, _ld12, 0, temphi);
// perform lowpass reconstruction
uplo (templo, sl3, tmp);
// perform highpass reconstruction
uphi (temphi, sl3, temptop);
// fusion of reconstruction parts
adddouble (tmp, temptop, sl3 * 2, tmp);
// write back reconstructed line
packdouble (tmp, sl3 * 2, _ld12, 0, & img [c1_glob]);
} // loop over lines along third dimension of result image
// update stride
stride = 6 * sl2 * t_num;
tmp = & _temp [stride];
templo = & _temp [2 * sl2 + stride];
temphi = & _temp [3 * sl2 + stride];
temptop = & _temp [4 * sl2 + stride];
# pragma omp for schedule (OMP_SCHEDULE)
// loop over lines along second dimension ('rows') of result image
for (int c1_loc = 0; c1_loc < 2 * sl1 * 2 * sl3; c1_loc++)
{
int c1_glob = (c1_loc / (2 * sl1)) * _sl1 * _sl2;
// copy lowpass part of current line to temporary memory
unpackdouble (& img [c1_glob], sl2, _sl1, c1_loc % (2 * sl1), templo);
// copy highpass part of current line to temporary memory
unpackdouble (& img [c1_glob + sl2 * _sl1], sl2, _sl1, c1_loc % (2 * sl1), temphi);
// perform lowpass reconstruction
uplo (templo, sl2, tmp);
// perform highpass reconstruction
uphi (temphi, sl2, temptop);
// fusion of reconstruction parts
adddouble (tmp, temptop, sl2 * 2, tmp);
// write back reconstructed line
packdouble (tmp, sl2 * 2, _sl1, c1_loc % (2 * sl1), & img [c1_glob]);
} // loop over lines along second dimension of result image
// update stride
stride = 5 * sl1 * t_num;
tmp = & _temp [stride];
templo = & _temp [ sl1 + stride];
temphi = & _temp [3 * sl1 + stride];
# pragma omp for schedule (OMP_SCHEDULE)
// loop over lines along first dimension ('columns') of result image
for (int c2_loc = 0; c2_loc < 2 * sl2 * 2 * sl3; c2_loc++)
{
int c2_glob = (c2_loc / (2 * sl2)) * _sl2 * _sl1 + (c2_loc % (2 * sl2)) * _sl1;
// assign address of current line's lowpass part
wcplo = & img [c2_glob];
// assign address of current line's highpass part
wcphi = & img [c2_glob + sl1];
// copy lowpass part to temporary memory
copydouble (wcplo, tmp, sl1);
// perform lowpass reconstruction
uplo (wcplo, sl1, templo);
// perform highpass reconstruction
uphi (wcphi, sl1, temphi);
// combine reconstructed parts and write back to current line
adddouble (templo, temphi, sl1 * 2, wcplo);
} // loop over lines along first dimension ('columns') of result image
// update current row / column size
sl2 *= 2;
sl1 *= 2;
sl3 *= 2;
} // loop over levels of backwards DWT
} // omp parallel
}
void mexFunction(int nlhs,mxArray *plhs[],int nrhs,const mxArray *prhs[])
{
DOUBLE *hpf,*lpf;
DOUBLE *sig,*wcp,*wcp1,*wcp2;
/* unsigned int m,n; */
int nr,nc,nn,mm,kk,J,lenfil,dee;
mxArray *temp, *hpfmat, *WP_OUT1, *WP_OUT2;
/* Check for proper number of arguments */
if (nrhs != 3) {
mexErrMsgTxt("rec_wp_decomp1 requires three input arguments.");
} else if (nlhs != 1) {
mexErrMsgTxt("rec_wp_decomp1 requires one output argument.");
}
/* Check the dimensions of signal. signal can be n X 1 or 1 X n. */
nr = mxGetM(Sig_IN);
nc = mxGetN(Sig_IN);
J = 0;
for( nn = 1; nn < nc; nn *= 2 )
J ++;
if( nn != nc){
mexErrMsgTxt("rec_wp_decomp1 requires dyadic length");
}
J = 0;
for( nn = 1; nn < nr; nn *= 2 )
J ++;
if( nn != nr){
mexErrMsgTxt("rec_wp_decomp1 requires dyadic length");
}
WP_OUT = mxCreateDoubleMatrix(nr, nc, mxREAL);
sig = mxGetPr(Sig_IN);
wcp = mxGetPr(WP_OUT);
lenfil = (int) (mxGetM(LPF_IN) * mxGetN(LPF_IN)); /* should check this */
lpf = mxGetPr(LPF_IN);
hpfmat = mxCreateDoubleMatrix((unsigned int) lenfil, 1, mxREAL);
hpf = mxGetPr(hpfmat);
mirrorfilt(lpf,hpf,lenfil);
for( kk = 0; kk < mxGetN(LLL_IN); kk++) {
dee = floor ((mxGetPr(LLL_IN))[kk] + .5); /* should check whether this is in range */
/* Create a matrix for the return argument */
if( dee > J ){
mexErrMsgTxt("rec_wp_decomp1 requires D < log_2(n)");
}
if( dee < 0){
mexErrMsgTxt("rec_wp_decomp1 requires D >= 0");
}
nn = dee+1;
for( mm = nc/2; mm < nc; mm++){
WP_OUT1 = mxCreateDoubleMatrix(nr, nn, mxREAL);
WP_OUT2 = mxCreateDoubleMatrix(nr, 1, mxREAL);
temp = mxCreateDoubleMatrix(nr, 6, mxREAL);
/* Assign pointers to the various parameters */
wcp1 = mxGetPr(WP_OUT1);
wcp2 = mxGetPr(WP_OUT2);
copydouble(&sig[mm*nr],wcp2,nr);
/* Do the actual computations in a subroutine */
wpd(wcp2,nr,dee,hpf,lpf,lenfil,wcp1,mxGetPr(temp));
copydouble(&wcp1[0],&wcp[mm*nr],nr);
mxDestroyArray(temp);
}
nc = nc/2;
}
mxDestroyArray(hpfmat);
}
