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

static ProcessorNEW ()

Static Public Attributes

static 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 4911 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 4926 of file processor.h.

04927                         {
04928                                 return "Translates a centered image to the corner in a forward fashion";
04929                         }

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 4916 of file processor.h.

References NAME.

04917                         {
04918                                 return NAME;
04919                         }

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

Definition at line 4921 of file processor.h.

04922                         {
04923                                 return new PhaseToCornerProcessor();
04924                         }

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 5047 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, rdata, EMAN::Phase180Processor::swap_central_slices_180(), and EMAN::Phase180Processor::swap_corners_180().

05048 {
05049         if (!image)     throw NullPointerException("Error: attempt to phase shift a null image");
05050 
05051 #ifdef EMAN2_USING_CUDA
05052         if (EMData::usecuda == 1 && image->getcudarwdata() && image->get_ndim() == 2) { // Because CUDA phase origin to center only works for 2D atm
05053                 //cout << "CUDA tocorner " << image->getcudarwdata() << endl;
05054                 emdata_phaseorigin_to_corner(image->getcudarwdata(), image->get_xsize(), image->get_ysize(), image->get_zsize());
05055                 return;
05056         }
05057 #endif // EMAN2_USING_CUDA
05058 
05059         if (image->is_complex()) {
05060                 fourier_phaseshift180(image);
05061                 return;
05062         }
05063 
05064         int nx = image->get_xsize();
05065         int ny = image->get_ysize();
05066         int nz = image->get_zsize();
05067 
05068         if ( ny == 1 && nz == 1 && nx == 1) return;
05069 
05070         int nxy = nx * ny;
05071 
05072         float *rdata = image->get_data();
05073 
05074         bool xodd = (nx % 2) == 1;
05075         bool yodd = (ny % 2) == 1;
05076         bool zodd = (nz % 2) == 1;
05077 
05078         if ( ny == 1 && nz == 1 ){
05079                 if (xodd){
05080                         // Put the last pixel in the center, shifting the contents
05081                         // to right of the center one step to the right
05082                         float in_x = rdata[nx-1];
05083                         float tmp;
05084                         for ( int i = nx/2; i < nx; ++i ) {
05085                                 tmp = rdata[i];
05086                                 rdata[i] = in_x;
05087                                 in_x = tmp;
05088                         }
05089                 }
05090                 // now the operation is straight forward
05091                 for ( int i = 0; i < nx/2; ++i ) {
05092                         int idx = i+nx/2+xodd;
05093                         float tmp = rdata[i];
05094                         rdata[i] = rdata[idx];
05095                         rdata[idx] = tmp;
05096                 }
05097 
05098         }
05099         else if ( nz == 1 ) {
05100                 if (yodd) {
05101                         // Tranfer the top row into the middle row,
05102                         // shifting all pixels above and including the current middle up one.
05103                         for ( int c = 0; c < nx; ++c ) {
05104                                 // Get the value in the top row
05105                                 float last_val = rdata[(ny-1)*nx + c];
05106                                 float tmp;
05107                                 for ( int r = ny/2; r < ny; ++r ){
05108                                         int idx =r*nx+c;
05109                                         tmp = rdata[idx];
05110                                         rdata[idx] = last_val;
05111                                         last_val = tmp;
05112                                 }
05113                         }
05114                 }
05115 
05116                 if (xodd) {
05117                         // Transfer the right most column into the center column
05118                         // Shift all columns right of and including center to the right one pixel
05119                         for ( int r  = 0; r < ny; ++r ) {
05120                                 float last_val = rdata[(r+1)*nx -1];
05121                                 float tmp;
05122                                 for ( int c = nx/2; c < nx; ++c ){
05123                                         int idx =r*nx+c;
05124                                         tmp = rdata[idx];
05125                                         rdata[idx] = last_val;
05126                                         last_val = tmp;
05127                                 }
05128                         }
05129                 }
05130                 // It is important central slice shifting come after the previous two operations
05131                 swap_central_slices_180(image);
05132                 // Now the corners of the image can be shifted...
05133                 swap_corners_180(image);
05134 
05135         }
05136         else
05137         {
05138                 float tmp;
05139                 if (zodd) {
05140                         // Tranfer the back slice into the middle slice,
05141                         // shifting all pixels beyond and including the middle slice back one.
05142                         size_t idx = 0;
05143                         for (int r = 0; r < ny; ++r){
05144                                 for (int c = 0; c < nx; ++c) {
05145                                         float last_val = rdata[(nz-1)*nxy+r*nx+c];
05146                                         for (int s = nz/2; s < nz; ++s) {
05147                                                 idx = (size_t)s*nxy+r*nx+c;
05148                                                 tmp = rdata[idx];
05149                                                 rdata[idx] = last_val;
05150                                                 last_val = tmp;
05151                                         }
05152                                 }
05153                         }
05154                 }
05155                 if (yodd) {
05156                         // Tranfer the top slice into the middle slice,
05157                         // shifting all pixels above and including the middle slice up one.
05158                         size_t idx = 0;
05159                         for (int s = 0; s < nz; ++s) {
05160                                 for (int c = 0; c < nx; ++c) {
05161                                 float last_val = rdata[s*nxy+(ny-1)*nx+c];
05162                                         for (int r = ny/2; r < ny; ++r){
05163                                                 idx = (size_t)s*nxy+r*nx+c;
05164                                                 tmp = rdata[idx];
05165                                                 rdata[idx] = last_val;
05166                                                 last_val = tmp;
05167                                         }
05168                                 }
05169                         }
05170                 }
05171                 if (xodd) {
05172                         // Transfer the right most slice into the central slice
05173                         // Shift all pixels to right of and including center slice to the right one pixel
05174                         size_t idx = 0;
05175                         for (int s = 0; s < nz; ++s) {
05176                                 for (int r = 0; r < ny; ++r) {
05177                                         float last_val = rdata[s*nxy+r*nx+nx-1];
05178                                         for (int c = nx/2; c < nx; ++c){
05179                                                 idx = (size_t)s*nxy+r*nx+c;
05180                                                 tmp = rdata[idx];
05181                                                 rdata[idx] = last_val;
05182                                                 last_val = tmp;
05183                                         }
05184                                 }
05185                         }
05186                 }
05187                 // Now swap the various parts in the central slices
05188                 swap_central_slices_180(image);
05189                 // Now shift the corners
05190                 swap_corners_180(image);
05191         }
05192 }


Member Data Documentation

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

Definition at line 4931 of file processor.h.

Referenced by get_name().


The documentation for this class was generated from the following files:
Generated on Tue Jun 11 12:44:23 2013 for EMAN2 by  doxygen 1.4.7