#include <processor.h>
Inheritance diagram for EMAN::PhaseToCenterProcessor:


Public Member Functions | |
| virtual void | process_inplace (EMData *image) |
| To process an image in-place. | |
| virtual string | get_name () const |
| Get the processor's name. | |
| virtual string | get_desc () const |
| Get the descrition of this specific processor. | |
Static Public Member Functions | |
| Processor * | NEW () |
Static Public Attributes | |
| const string | NAME = "xform.phaseorigin.tocenter" |
works for 1D, 2D and 3D images, for all combinations of even and oddness
Definition at line 4803 of file processor.h.
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Get the descrition of this specific processor. This function must be overwritten by a subclass.
Implements EMAN::Processor. Definition at line 4818 of file processor.h. 04819 {
04820 return "Undoes the effect of the xform.phaseorigin.tocorner processor";
04821 }
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Get the processor's name. Each processor is identified by a unique name.
Implements EMAN::Processor. Definition at line 4808 of file processor.h. 04809 {
04810 return NAME;
04811 }
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Definition at line 4813 of file processor.h. 04814 {
04815 return new PhaseToCenterProcessor();
04816 }
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To process an image in-place. For those processors which can only be processed out-of-place, override this function to just print out some error message to remind user call the out-of-place version.
Implements EMAN::Processor. Definition at line 5102 of file processor.cpp. References emdata_phaseorigin_to_center(), EMAN::Phase180Processor::fourier_phaseshift180(), EMAN::EMData::get_data(), EMAN::EMData::get_ndim(), EMAN::EMData::get_xsize(), EMAN::EMData::get_ysize(), EMAN::EMData::get_zsize(), EMAN::EMData::is_complex(), NullPointerException, nx, ny, rdata, EMAN::Phase180Processor::swap_central_slices_180(), and EMAN::Phase180Processor::swap_corners_180(). 05103 {
05104 if (!image) throw NullPointerException("Error: attempt to phase shift a null image");
05105
05106 #ifdef EMAN2_USING_CUDA
05107 if (EMData::usecuda == 1 && image->getcudarwdata() && image->get_ndim() == 2) { // Because CUDA phase origin to center only works for 2D atm
05108 //cout << "CUDA tocenter" << endl;
05109 emdata_phaseorigin_to_center(image->getcudarwdata(), image->get_xsize(), image->get_ysize(), image->get_zsize());
05110 return;
05111 }
05112 #endif // EMAN2_USING_CUDA
05113
05114 if (image->is_complex()) {
05115 fourier_phaseshift180(image);
05116 return;
05117 }
05118
05119 int nx = image->get_xsize();
05120 int ny = image->get_ysize();
05121 int nz = image->get_zsize();
05122
05123 if ( ny == 1 && nz == 1 && nx == 1) return;
05124
05125 int nxy = nx * ny;
05126
05127 float *rdata = image->get_data();
05128
05129 bool xodd = (nx % 2) == 1;
05130 bool yodd = (ny % 2) == 1;
05131 bool zodd = (nz % 2) == 1;
05132
05133 if ( ny == 1 && nz == 1 ){
05134 if (xodd) {
05135 // Put the center pixel at the end, shifting the contents
05136 // to right of the center one step to the left
05137 float in_x = rdata[nx/2];
05138 float tmp;
05139 for ( int i = nx-1; i >= nx/2; --i ) {
05140 tmp = rdata[i];
05141 rdata[i] = in_x;
05142 in_x = tmp;
05143 }
05144 }
05145 // now the operation is straight forward
05146 for ( int i = 0; i < nx/2; ++i ) {
05147 int idx = i + nx/2;
05148 float tmp = rdata[i];
05149 rdata[i] = rdata[idx];
05150 rdata[idx] = tmp;
05151 }
05152 }
05153 else if ( nz == 1 ){
05154 // The order in which these operations occur literally undoes what the
05155 // PhaseToCornerProcessor did to the image.
05156 // First, the corners sections of the image are swapped appropriately
05157 swap_corners_180(image);
05158 // Second, central pixel lines are swapped
05159 swap_central_slices_180(image);
05160
05161 float tmp;
05162 // Third, appropriate sections of the image are cyclically shifted by one pixel
05163 if (xodd) {
05164 // Transfer the middle column to the far right
05165 // Shift all from the far right to (but not including the) middle one to the left
05166 for ( int r = 0; r < ny; ++r ) {
05167 float last_val = rdata[r*nx+nx/2];
05168 for ( int c = nx-1; c >= nx/2; --c ){
05169 int idx = r*nx+c;
05170 tmp = rdata[idx];
05171 rdata[idx] = last_val;
05172 last_val = tmp;
05173 }
05174 }
05175 }
05176 if (yodd) {
05177 // Tranfer the middle row to the top,
05178 // shifting all pixels from the top row down one, until but not including the) middle
05179 for ( int c = 0; c < nx; ++c ) {
05180 // Get the value in the top row
05181 float last_val = rdata[ny/2*nx + c];
05182 for ( int r = ny-1; r >= ny/2; --r ){
05183 int idx = r*nx+c;
05184 tmp = rdata[idx];
05185 rdata[idx] = last_val;
05186 last_val = tmp;
05187 }
05188 }
05189 }
05190 }
05191 else
05192 {
05193 // The order in which these operations occur literally undoes the
05194 // PhaseToCornerProcessor operation - in 3D.
05195 // First, the corner quadrants of the voxel volume are swapped
05196 swap_corners_180(image);
05197 // Second, appropriate parts of the central slices are swapped
05198 swap_central_slices_180(image);
05199
05200 float tmp;
05201 // Third, appropriate sections of the image are cyclically shifted by one voxel
05202 if (xodd) {
05203 // Transfer the central slice in the x direction to the far right
05204 // moving all slices on the far right toward the center one pixel, until
05205 // the center x slice is ecountered
05206 size_t idx = 0;
05207 for (int s = 0; s < nz; ++s) {
05208 for (int r = 0; r < ny; ++r) {
05209 float last_val = rdata[s*nxy+r*nx+nx/2];
05210 for (int c = nx-1; c >= nx/2; --c){
05211 idx = (size_t)s*nxy+r*nx+c;
05212 tmp = rdata[idx];
05213 rdata[idx] = last_val;
05214 last_val = tmp;
05215 }
05216 }
05217 }
05218 }
05219 if (yodd) {
05220 // Tranfer the central slice in the y direction to the top
05221 // shifting all pixels below it down on, until the center y slice is encountered.
05222 size_t idx = 0;
05223 for (int s = 0; s < nz; ++s) {
05224 for (int c = 0; c < nx; ++c) {
05225 float last_val = rdata[s*nxy+ny/2*nx+c];
05226 for (int r = ny-1; r >= ny/2; --r){
05227 idx = (size_t)s*nxy+r*nx+c;
05228 tmp = rdata[idx];
05229 rdata[idx] = last_val;
05230 last_val = tmp;
05231 }
05232 }
05233 }
05234 }
05235 if (zodd) {
05236 // Tranfer the central slice in the z direction to the back
05237 // shifting all pixels beyond and including the middle slice back one.
05238 size_t idx = 0;
05239 for (int r = 0; r < ny; ++r){
05240 for (int c = 0; c < nx; ++c) {
05241 float last_val = rdata[nz/2*nxy+r*nx+c];
05242 for (int s = nz-1; s >= nz/2; --s) {
05243 idx = (size_t)s*nxy+r*nx+c;
05244 tmp = rdata[idx];
05245 rdata[idx] = last_val;
05246 last_val = tmp;
05247 }
05248 }
05249 }
05250 }
05251
05252
05253 }
05254 }
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Definition at line 169 of file processor.cpp. |
1.3.9.1