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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 4864 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 4879 of file processor.h.

04880                         {
04881                                 return "Translates a centered image to the corner in a forward fashion";
04882                         }

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 4869 of file processor.h.

04870                         {
04871                                 return NAME;
04872                         }

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

Definition at line 4874 of file processor.h.

04875                         {
04876                                 return new PhaseToCornerProcessor();
04877                         }

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 4969 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().

04970 {
04971         if (!image)     throw NullPointerException("Error: attempt to phase shift a null image");
04972 
04973 #ifdef EMAN2_USING_CUDA
04974         if (EMData::usecuda == 1 && image->getcudarwdata() && image->get_ndim() == 2) { // Because CUDA phase origin to center only works for 2D atm
04975                 //cout << "CUDA tocorner " << image->getcudarwdata() << endl;
04976                 emdata_phaseorigin_to_corner(image->getcudarwdata(), image->get_xsize(), image->get_ysize(), image->get_zsize());
04977                 return;
04978         }
04979 #endif // EMAN2_USING_CUDA
04980 
04981         if (image->is_complex()) {
04982                 fourier_phaseshift180(image);
04983                 return;
04984         }
04985 
04986         int nx = image->get_xsize();
04987         int ny = image->get_ysize();
04988         int nz = image->get_zsize();
04989 
04990         if ( ny == 1 && nz == 1 && nx == 1) return;
04991 
04992         int nxy = nx * ny;
04993 
04994         float *rdata = image->get_data();
04995 
04996         bool xodd = (nx % 2) == 1;
04997         bool yodd = (ny % 2) == 1;
04998         bool zodd = (nz % 2) == 1;
04999 
05000         if ( ny == 1 && nz == 1 ){
05001                 if (xodd){
05002                         // Put the last pixel in the center, shifting the contents
05003                         // to right of the center one step to the right
05004                         float in_x = rdata[nx-1];
05005                         float tmp;
05006                         for ( int i = nx/2; i < nx; ++i ) {
05007                                 tmp = rdata[i];
05008                                 rdata[i] = in_x;
05009                                 in_x = tmp;
05010                         }
05011                 }
05012                 // now the operation is straight forward
05013                 for ( int i = 0; i < nx/2; ++i ) {
05014                         int idx = i+nx/2+xodd;
05015                         float tmp = rdata[i];
05016                         rdata[i] = rdata[idx];
05017                         rdata[idx] = tmp;
05018                 }
05019 
05020         }
05021         else if ( nz == 1 ) {
05022                 if (yodd) {
05023                         // Tranfer the top row into the middle row,
05024                         // shifting all pixels above and including the current middle up one.
05025                         for ( int c = 0; c < nx; ++c ) {
05026                                 // Get the value in the top row
05027                                 float last_val = rdata[(ny-1)*nx + c];
05028                                 float tmp;
05029                                 for ( int r = ny/2; r < ny; ++r ){
05030                                         int idx =r*nx+c;
05031                                         tmp = rdata[idx];
05032                                         rdata[idx] = last_val;
05033                                         last_val = tmp;
05034                                 }
05035                         }
05036                 }
05037 
05038                 if (xodd) {
05039                         // Transfer the right most column into the center column
05040                         // Shift all columns right of and including center to the right one pixel
05041                         for ( int r  = 0; r < ny; ++r ) {
05042                                 float last_val = rdata[(r+1)*nx -1];
05043                                 float tmp;
05044                                 for ( int c = nx/2; c < nx; ++c ){
05045                                         int idx =r*nx+c;
05046                                         tmp = rdata[idx];
05047                                         rdata[idx] = last_val;
05048                                         last_val = tmp;
05049                                 }
05050                         }
05051                 }
05052                 // It is important central slice shifting come after the previous two operations
05053                 swap_central_slices_180(image);
05054                 // Now the corners of the image can be shifted...
05055                 swap_corners_180(image);
05056 
05057         }
05058         else
05059         {
05060                 float tmp;
05061                 if (zodd) {
05062                         // Tranfer the back slice into the middle slice,
05063                         // shifting all pixels beyond and including the middle slice back one.
05064                         size_t idx = 0;
05065                         for (int r = 0; r < ny; ++r){
05066                                 for (int c = 0; c < nx; ++c) {
05067                                         float last_val = rdata[(nz-1)*nxy+r*nx+c];
05068                                         for (int s = nz/2; s < nz; ++s) {
05069                                                 idx = (size_t)s*nxy+r*nx+c;
05070                                                 tmp = rdata[idx];
05071                                                 rdata[idx] = last_val;
05072                                                 last_val = tmp;
05073                                         }
05074                                 }
05075                         }
05076                 }
05077                 if (yodd) {
05078                         // Tranfer the top slice into the middle slice,
05079                         // shifting all pixels above and including the middle slice up one.
05080                         size_t idx = 0;
05081                         for (int s = 0; s < nz; ++s) {
05082                                 for (int c = 0; c < nx; ++c) {
05083                                 float last_val = rdata[s*nxy+(ny-1)*nx+c];
05084                                         for (int r = ny/2; r < ny; ++r){
05085                                                 idx = (size_t)s*nxy+r*nx+c;
05086                                                 tmp = rdata[idx];
05087                                                 rdata[idx] = last_val;
05088                                                 last_val = tmp;
05089                                         }
05090                                 }
05091                         }
05092                 }
05093                 if (xodd) {
05094                         // Transfer the right most slice into the central slice
05095                         // Shift all pixels to right of and including center slice to the right one pixel
05096                         size_t idx = 0;
05097                         for (int s = 0; s < nz; ++s) {
05098                                 for (int r = 0; r < ny; ++r) {
05099                                         float last_val = rdata[s*nxy+r*nx+nx-1];
05100                                         for (int c = nx/2; c < nx; ++c){
05101                                                 idx = (size_t)s*nxy+r*nx+c;
05102                                                 tmp = rdata[idx];
05103                                                 rdata[idx] = last_val;
05104                                                 last_val = tmp;
05105                                         }
05106                                 }
05107                         }
05108                 }
05109                 // Now swap the various parts in the central slices
05110                 swap_central_slices_180(image);
05111                 // Now shift the corners
05112                 swap_corners_180(image);
05113         }
05114 }


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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