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EMAN::PhaseToCornerProcessor Class Reference
[unit test in Python]

Translates a centered image to the corner works for 1D, 2D and 3D images, for all combinations of even and oddness. More...

#include <processor.h>

Inheritance diagram for EMAN::PhaseToCornerProcessor:

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Collaboration diagram for EMAN::PhaseToCornerProcessor:

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List of all members.

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

ProcessorNEW ()

Static Public Attributes

const string NAME = "xform.phaseorigin.tocorner"

Detailed Description

Translates a centered image to the corner works for 1D, 2D and 3D images, for all combinations of even and oddness.

Author:
David Woolford <woolford@bcm.edu>
Date:
October 2007

Definition at line 4909 of file processor.h.


Member Function Documentation

virtual string EMAN::PhaseToCornerProcessor::get_desc  )  const [inline, virtual]
 

Get the descrition of this specific processor.

This function must be overwritten by a subclass.

Returns:
The description of this processor.

Implements EMAN::Processor.

Definition at line 4924 of file processor.h.

04925                         {
04926                                 return "Translates a centered image to the corner in a forward fashion";
04927                         }

virtual string EMAN::PhaseToCornerProcessor::get_name  )  const [inline, virtual]
 

Get the processor's name.

Each processor is identified by a unique name.

Returns:
The processor's name.

Implements EMAN::Processor.

Definition at line 4914 of file processor.h.

04915                         {
04916                                 return NAME;
04917                         }

Processor* EMAN::PhaseToCornerProcessor::NEW  )  [inline, static]
 

Definition at line 4919 of file processor.h.

04920                         {
04921                                 return new PhaseToCornerProcessor();
04922                         }

void PhaseToCornerProcessor::process_inplace EMData image  )  [virtual]
 

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.

Parameters:
image The image to be processed.

Implements EMAN::Processor.

Definition at line 5045 of file processor.cpp.

References emdata_phaseorigin_to_corner(), 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().

05046 {
05047         if (!image)     throw NullPointerException("Error: attempt to phase shift a null image");
05048 
05049 #ifdef EMAN2_USING_CUDA
05050         if (EMData::usecuda == 1 && image->getcudarwdata() && image->get_ndim() == 2) { // Because CUDA phase origin to center only works for 2D atm
05051                 //cout << "CUDA tocorner " << image->getcudarwdata() << endl;
05052                 emdata_phaseorigin_to_corner(image->getcudarwdata(), image->get_xsize(), image->get_ysize(), image->get_zsize());
05053                 return;
05054         }
05055 #endif // EMAN2_USING_CUDA
05056 
05057         if (image->is_complex()) {
05058                 fourier_phaseshift180(image);
05059                 return;
05060         }
05061 
05062         int nx = image->get_xsize();
05063         int ny = image->get_ysize();
05064         int nz = image->get_zsize();
05065 
05066         if ( ny == 1 && nz == 1 && nx == 1) return;
05067 
05068         int nxy = nx * ny;
05069 
05070         float *rdata = image->get_data();
05071 
05072         bool xodd = (nx % 2) == 1;
05073         bool yodd = (ny % 2) == 1;
05074         bool zodd = (nz % 2) == 1;
05075 
05076         if ( ny == 1 && nz == 1 ){
05077                 if (xodd){
05078                         // Put the last pixel in the center, shifting the contents
05079                         // to right of the center one step to the right
05080                         float in_x = rdata[nx-1];
05081                         float tmp;
05082                         for ( int i = nx/2; i < nx; ++i ) {
05083                                 tmp = rdata[i];
05084                                 rdata[i] = in_x;
05085                                 in_x = tmp;
05086                         }
05087                 }
05088                 // now the operation is straight forward
05089                 for ( int i = 0; i < nx/2; ++i ) {
05090                         int idx = i+nx/2+xodd;
05091                         float tmp = rdata[i];
05092                         rdata[i] = rdata[idx];
05093                         rdata[idx] = tmp;
05094                 }
05095 
05096         }
05097         else if ( nz == 1 ) {
05098                 if (yodd) {
05099                         // Tranfer the top row into the middle row,
05100                         // shifting all pixels above and including the current middle up one.
05101                         for ( int c = 0; c < nx; ++c ) {
05102                                 // Get the value in the top row
05103                                 float last_val = rdata[(ny-1)*nx + c];
05104                                 float tmp;
05105                                 for ( int r = ny/2; r < ny; ++r ){
05106                                         int idx =r*nx+c;
05107                                         tmp = rdata[idx];
05108                                         rdata[idx] = last_val;
05109                                         last_val = tmp;
05110                                 }
05111                         }
05112                 }
05113 
05114                 if (xodd) {
05115                         // Transfer the right most column into the center column
05116                         // Shift all columns right of and including center to the right one pixel
05117                         for ( int r  = 0; r < ny; ++r ) {
05118                                 float last_val = rdata[(r+1)*nx -1];
05119                                 float tmp;
05120                                 for ( int c = nx/2; c < nx; ++c ){
05121                                         int idx =r*nx+c;
05122                                         tmp = rdata[idx];
05123                                         rdata[idx] = last_val;
05124                                         last_val = tmp;
05125                                 }
05126                         }
05127                 }
05128                 // It is important central slice shifting come after the previous two operations
05129                 swap_central_slices_180(image);
05130                 // Now the corners of the image can be shifted...
05131                 swap_corners_180(image);
05132 
05133         }
05134         else
05135         {
05136                 float tmp;
05137                 if (zodd) {
05138                         // Tranfer the back slice into the middle slice,
05139                         // shifting all pixels beyond and including the middle slice back one.
05140                         size_t idx = 0;
05141                         for (int r = 0; r < ny; ++r){
05142                                 for (int c = 0; c < nx; ++c) {
05143                                         float last_val = rdata[(nz-1)*nxy+r*nx+c];
05144                                         for (int s = nz/2; s < nz; ++s) {
05145                                                 idx = (size_t)s*nxy+r*nx+c;
05146                                                 tmp = rdata[idx];
05147                                                 rdata[idx] = last_val;
05148                                                 last_val = tmp;
05149                                         }
05150                                 }
05151                         }
05152                 }
05153                 if (yodd) {
05154                         // Tranfer the top slice into the middle slice,
05155                         // shifting all pixels above and including the middle slice up one.
05156                         size_t idx = 0;
05157                         for (int s = 0; s < nz; ++s) {
05158                                 for (int c = 0; c < nx; ++c) {
05159                                 float last_val = rdata[s*nxy+(ny-1)*nx+c];
05160                                         for (int r = ny/2; r < ny; ++r){
05161                                                 idx = (size_t)s*nxy+r*nx+c;
05162                                                 tmp = rdata[idx];
05163                                                 rdata[idx] = last_val;
05164                                                 last_val = tmp;
05165                                         }
05166                                 }
05167                         }
05168                 }
05169                 if (xodd) {
05170                         // Transfer the right most slice into the central slice
05171                         // Shift all pixels to right of and including center slice to the right one pixel
05172                         size_t idx = 0;
05173                         for (int s = 0; s < nz; ++s) {
05174                                 for (int r = 0; r < ny; ++r) {
05175                                         float last_val = rdata[s*nxy+r*nx+nx-1];
05176                                         for (int c = nx/2; c < nx; ++c){
05177                                                 idx = (size_t)s*nxy+r*nx+c;
05178                                                 tmp = rdata[idx];
05179                                                 rdata[idx] = last_val;
05180                                                 last_val = tmp;
05181                                         }
05182                                 }
05183                         }
05184                 }
05185                 // Now swap the various parts in the central slices
05186                 swap_central_slices_180(image);
05187                 // Now shift the corners
05188                 swap_corners_180(image);
05189         }
05190 }


Member Data Documentation

const string PhaseToCornerProcessor::NAME = "xform.phaseorigin.tocorner" [static]
 

Definition at line 165 of file processor.cpp.


The documentation for this class was generated from the following files:
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