#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 4879 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 4894 of file processor.h. 04895 { 04896 return "Undoes the effect of the xform.phaseorigin.tocorner processor"; 04897 }
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Get the processor's name. Each processor is identified by a unique name.
Implements EMAN::Processor. Definition at line 4884 of file processor.h. 04885 {
04886 return NAME;
04887 }
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Definition at line 4889 of file processor.h. 04890 { 04891 return new PhaseToCenterProcessor(); 04892 }
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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 5193 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(). 05194 { 05195 if (!image) throw NullPointerException("Error: attempt to phase shift a null image"); 05196 05197 #ifdef EMAN2_USING_CUDA 05198 if (EMData::usecuda == 1 && image->getcudarwdata() && image->get_ndim() == 2) { // Because CUDA phase origin to center only works for 2D atm 05199 //cout << "CUDA tocenter" << endl; 05200 emdata_phaseorigin_to_center(image->getcudarwdata(), image->get_xsize(), image->get_ysize(), image->get_zsize()); 05201 return; 05202 } 05203 #endif // EMAN2_USING_CUDA 05204 05205 if (image->is_complex()) { 05206 fourier_phaseshift180(image); 05207 return; 05208 } 05209 05210 int nx = image->get_xsize(); 05211 int ny = image->get_ysize(); 05212 int nz = image->get_zsize(); 05213 05214 if ( ny == 1 && nz == 1 && nx == 1) return; 05215 05216 int nxy = nx * ny; 05217 05218 float *rdata = image->get_data(); 05219 05220 bool xodd = (nx % 2) == 1; 05221 bool yodd = (ny % 2) == 1; 05222 bool zodd = (nz % 2) == 1; 05223 05224 if ( ny == 1 && nz == 1 ){ 05225 if (xodd) { 05226 // Put the center pixel at the end, shifting the contents 05227 // to right of the center one step to the left 05228 float in_x = rdata[nx/2]; 05229 float tmp; 05230 for ( int i = nx-1; i >= nx/2; --i ) { 05231 tmp = rdata[i]; 05232 rdata[i] = in_x; 05233 in_x = tmp; 05234 } 05235 } 05236 // now the operation is straight forward 05237 for ( int i = 0; i < nx/2; ++i ) { 05238 int idx = i + nx/2; 05239 float tmp = rdata[i]; 05240 rdata[i] = rdata[idx]; 05241 rdata[idx] = tmp; 05242 } 05243 } 05244 else if ( nz == 1 ){ 05245 // The order in which these operations occur literally undoes what the 05246 // PhaseToCornerProcessor did to the image. 05247 // First, the corners sections of the image are swapped appropriately 05248 swap_corners_180(image); 05249 // Second, central pixel lines are swapped 05250 swap_central_slices_180(image); 05251 05252 float tmp; 05253 // Third, appropriate sections of the image are cyclically shifted by one pixel 05254 if (xodd) { 05255 // Transfer the middle column to the far right 05256 // Shift all from the far right to (but not including the) middle one to the left 05257 for ( int r = 0; r < ny; ++r ) { 05258 float last_val = rdata[r*nx+nx/2]; 05259 for ( int c = nx-1; c >= nx/2; --c ){ 05260 int idx = r*nx+c; 05261 tmp = rdata[idx]; 05262 rdata[idx] = last_val; 05263 last_val = tmp; 05264 } 05265 } 05266 } 05267 if (yodd) { 05268 // Tranfer the middle row to the top, 05269 // shifting all pixels from the top row down one, until but not including the) middle 05270 for ( int c = 0; c < nx; ++c ) { 05271 // Get the value in the top row 05272 float last_val = rdata[ny/2*nx + c]; 05273 for ( int r = ny-1; r >= ny/2; --r ){ 05274 int idx = r*nx+c; 05275 tmp = rdata[idx]; 05276 rdata[idx] = last_val; 05277 last_val = tmp; 05278 } 05279 } 05280 } 05281 } 05282 else 05283 { 05284 // The order in which these operations occur literally undoes the 05285 // PhaseToCornerProcessor operation - in 3D. 05286 // First, the corner quadrants of the voxel volume are swapped 05287 swap_corners_180(image); 05288 // Second, appropriate parts of the central slices are swapped 05289 swap_central_slices_180(image); 05290 05291 float tmp; 05292 // Third, appropriate sections of the image are cyclically shifted by one voxel 05293 if (xodd) { 05294 // Transfer the central slice in the x direction to the far right 05295 // moving all slices on the far right toward the center one pixel, until 05296 // the center x slice is ecountered 05297 size_t idx = 0; 05298 for (int s = 0; s < nz; ++s) { 05299 for (int r = 0; r < ny; ++r) { 05300 float last_val = rdata[s*nxy+r*nx+nx/2]; 05301 for (int c = nx-1; c >= nx/2; --c){ 05302 idx = (size_t)s*nxy+r*nx+c; 05303 tmp = rdata[idx]; 05304 rdata[idx] = last_val; 05305 last_val = tmp; 05306 } 05307 } 05308 } 05309 } 05310 if (yodd) { 05311 // Tranfer the central slice in the y direction to the top 05312 // shifting all pixels below it down on, until the center y slice is encountered. 05313 size_t idx = 0; 05314 for (int s = 0; s < nz; ++s) { 05315 for (int c = 0; c < nx; ++c) { 05316 float last_val = rdata[s*nxy+ny/2*nx+c]; 05317 for (int r = ny-1; r >= ny/2; --r){ 05318 idx = (size_t)s*nxy+r*nx+c; 05319 tmp = rdata[idx]; 05320 rdata[idx] = last_val; 05321 last_val = tmp; 05322 } 05323 } 05324 } 05325 } 05326 if (zodd) { 05327 // Tranfer the central slice in the z direction to the back 05328 // shifting all pixels beyond and including the middle slice back one. 05329 size_t idx = 0; 05330 for (int r = 0; r < ny; ++r){ 05331 for (int c = 0; c < nx; ++c) { 05332 float last_val = rdata[nz/2*nxy+r*nx+c]; 05333 for (int s = nz-1; s >= nz/2; --s) { 05334 idx = (size_t)s*nxy+r*nx+c; 05335 tmp = rdata[idx]; 05336 rdata[idx] = last_val; 05337 last_val = tmp; 05338 } 05339 } 05340 } 05341 } 05342 05343 05344 } 05345 }
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Definition at line 164 of file processor.cpp. |