#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. |