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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 4833 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 4848 of file processor.h.

04849                         {
04850                                 return "Translates a centered image to the corner in a forward fashion";
04851                         }

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 4838 of file processor.h.

04839                         {
04840                                 return NAME;
04841                         }

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

Definition at line 4843 of file processor.h.

04844                         {
04845                                 return new PhaseToCornerProcessor();
04846                         }

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 4954 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().

04955 {
04956         if (!image)     throw NullPointerException("Error: attempt to phase shift a null image");
04957 
04958 #ifdef EMAN2_USING_CUDA
04959         if (EMData::usecuda == 1 && image->getcudarwdata() && image->get_ndim() == 2) { // Because CUDA phase origin to center only works for 2D atm
04960                 //cout << "CUDA tocorner " << image->getcudarwdata() << endl;
04961                 emdata_phaseorigin_to_corner(image->getcudarwdata(), image->get_xsize(), image->get_ysize(), image->get_zsize());
04962                 return;
04963         }
04964 #endif // EMAN2_USING_CUDA
04965 
04966         if (image->is_complex()) {
04967                 fourier_phaseshift180(image);
04968                 return;
04969         }
04970 
04971         int nx = image->get_xsize();
04972         int ny = image->get_ysize();
04973         int nz = image->get_zsize();
04974 
04975         if ( ny == 1 && nz == 1 && nx == 1) return;
04976 
04977         int nxy = nx * ny;
04978 
04979         float *rdata = image->get_data();
04980 
04981         bool xodd = (nx % 2) == 1;
04982         bool yodd = (ny % 2) == 1;
04983         bool zodd = (nz % 2) == 1;
04984 
04985         if ( ny == 1 && nz == 1 ){
04986                 if (xodd){
04987                         // Put the last pixel in the center, shifting the contents
04988                         // to right of the center one step to the right
04989                         float in_x = rdata[nx-1];
04990                         float tmp;
04991                         for ( int i = nx/2; i < nx; ++i ) {
04992                                 tmp = rdata[i];
04993                                 rdata[i] = in_x;
04994                                 in_x = tmp;
04995                         }
04996                 }
04997                 // now the operation is straight forward
04998                 for ( int i = 0; i < nx/2; ++i ) {
04999                         int idx = i+nx/2+xodd;
05000                         float tmp = rdata[i];
05001                         rdata[i] = rdata[idx];
05002                         rdata[idx] = tmp;
05003                 }
05004 
05005         }
05006         else if ( nz == 1 ) {
05007                 if (yodd) {
05008                         // Tranfer the top row into the middle row,
05009                         // shifting all pixels above and including the current middle up one.
05010                         for ( int c = 0; c < nx; ++c ) {
05011                                 // Get the value in the top row
05012                                 float last_val = rdata[(ny-1)*nx + c];
05013                                 float tmp;
05014                                 for ( int r = ny/2; r < ny; ++r ){
05015                                         int idx =r*nx+c;
05016                                         tmp = rdata[idx];
05017                                         rdata[idx] = last_val;
05018                                         last_val = tmp;
05019                                 }
05020                         }
05021                 }
05022 
05023                 if (xodd) {
05024                         // Transfer the right most column into the center column
05025                         // Shift all columns right of and including center to the right one pixel
05026                         for ( int r  = 0; r < ny; ++r ) {
05027                                 float last_val = rdata[(r+1)*nx -1];
05028                                 float tmp;
05029                                 for ( int c = nx/2; c < nx; ++c ){
05030                                         int idx =r*nx+c;
05031                                         tmp = rdata[idx];
05032                                         rdata[idx] = last_val;
05033                                         last_val = tmp;
05034                                 }
05035                         }
05036                 }
05037                 // It is important central slice shifting come after the previous two operations
05038                 swap_central_slices_180(image);
05039                 // Now the corners of the image can be shifted...
05040                 swap_corners_180(image);
05041 
05042         }
05043         else
05044         {
05045                 float tmp;
05046                 if (zodd) {
05047                         // Tranfer the back slice into the middle slice,
05048                         // shifting all pixels beyond and including the middle slice back one.
05049                         size_t idx = 0;
05050                         for (int r = 0; r < ny; ++r){
05051                                 for (int c = 0; c < nx; ++c) {
05052                                         float last_val = rdata[(nz-1)*nxy+r*nx+c];
05053                                         for (int s = nz/2; s < nz; ++s) {
05054                                                 idx = (size_t)s*nxy+r*nx+c;
05055                                                 tmp = rdata[idx];
05056                                                 rdata[idx] = last_val;
05057                                                 last_val = tmp;
05058                                         }
05059                                 }
05060                         }
05061                 }
05062                 if (yodd) {
05063                         // Tranfer the top slice into the middle slice,
05064                         // shifting all pixels above and including the middle slice up one.
05065                         size_t idx = 0;
05066                         for (int s = 0; s < nz; ++s) {
05067                                 for (int c = 0; c < nx; ++c) {
05068                                 float last_val = rdata[s*nxy+(ny-1)*nx+c];
05069                                         for (int r = ny/2; r < ny; ++r){
05070                                                 idx = (size_t)s*nxy+r*nx+c;
05071                                                 tmp = rdata[idx];
05072                                                 rdata[idx] = last_val;
05073                                                 last_val = tmp;
05074                                         }
05075                                 }
05076                         }
05077                 }
05078                 if (xodd) {
05079                         // Transfer the right most slice into the central slice
05080                         // Shift all pixels to right of and including center slice to the right one pixel
05081                         size_t idx = 0;
05082                         for (int s = 0; s < nz; ++s) {
05083                                 for (int r = 0; r < ny; ++r) {
05084                                         float last_val = rdata[s*nxy+r*nx+nx-1];
05085                                         for (int c = nx/2; c < nx; ++c){
05086                                                 idx = (size_t)s*nxy+r*nx+c;
05087                                                 tmp = rdata[idx];
05088                                                 rdata[idx] = last_val;
05089                                                 last_val = tmp;
05090                                         }
05091                                 }
05092                         }
05093                 }
05094                 // Now swap the various parts in the central slices
05095                 swap_central_slices_180(image);
05096                 // Now shift the corners
05097                 swap_corners_180(image);
05098         }
05099 }


Member Data Documentation

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

Definition at line 170 of file processor.cpp.


The documentation for this class was generated from the following files:
Generated on Tue Jul 12 13:51:19 2011 for EMAN2 by  doxygen 1.3.9.1