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EMAN::RealToFFTProcessor Class Reference

This will replace the image with a full-circle 2D fft amplitude rendering. More...

#include <processor.h>

Inheritance diagram for EMAN::RealToFFTProcessor:

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Collaboration diagram for EMAN::RealToFFTProcessor:

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List of all members.

Public Member Functions

void process_inplace (EMData *image)
 To process an image in-place.
string get_name () const
 Get the processor's name.
string get_desc () const
 Get the descrition of this specific processor.

Static Public Member Functions

ProcessorNEW ()

Static Public Attributes

const string NAME = "math.realtofft"

Detailed Description

This will replace the image with a full-circle 2D fft amplitude rendering.

Definition at line 3817 of file processor.h.


Member Function Documentation

string EMAN::RealToFFTProcessor::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 3832 of file processor.h.

03833                 {
03834                         return "This will replace the image with a full-circle 2D fft amplitude rendering. Note that this renders amplitude, when intensity is more common.";
03835                 }

string EMAN::RealToFFTProcessor::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 3822 of file processor.h.

Referenced by process_inplace().

03823                 {
03824                         return NAME;
03825                 }

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

Definition at line 3827 of file processor.h.

03828                 {
03829                         return new RealToFFTProcessor();
03830                 }

void RealToFFTProcessor::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 3041 of file processor.cpp.

References EMAN::EMData::do_fft(), get_name(), EMAN::EMData::get_value_at(), EMAN::EMData::get_xsize(), EMAN::EMData::get_ysize(), EMAN::EMData::get_zsize(), ImageDimensionException, ImageFormatException, EMAN::EMData::is_complex(), LOGERR, LOGWARN, norm(), nx, ny, EMAN::EMData::ri2ap(), EMAN::EMData::set_value_at(), EMAN::EMData::update(), x, and y.

03042 {
03043         if (!image) {
03044                 LOGWARN("NULL Image");
03045                 return;
03046         }
03047 
03048         //Note : real image only!
03049         if(image->is_complex()) {
03050                 LOGERR("%s Processor only operates on real images", get_name().c_str());
03051                 throw ImageFormatException("apply to real image only");
03052         }
03053 
03054         // Note : 2D only!
03055         int nz = image->get_zsize();
03056         if (nz > 1) {
03057                 LOGERR("%s Processor doesn't support 3D models", get_name().c_str());
03058                 throw ImageDimensionException("3D model not supported");
03059         }
03060 
03061         EMData *ff=image->do_fft();
03062         ff->ri2ap();
03063 
03064         int nx=image->get_xsize();
03065         int ny=image->get_ysize();
03066 
03067         int x,y;
03068         float norm=static_cast<float>(nx*ny);
03069 
03070         for (y=0; y<ny; y++) image->set_value_at(0,y,0);
03071 
03072         for (x=1; x<nx/2; x++) {
03073                 for (y=0; y<ny; y++) {
03074                         int y2;
03075                         if (y<ny/2) y2=y+ny/2;
03076                         else if (y==ny/2) y2=ny;
03077                         else y2=y-ny/2;
03078                         image->set_value_at(x,y,ff->get_value_at(nx-x*2,ny-y2)/norm);
03079                 }
03080         }
03081 
03082         for (x=nx/2; x<nx; x++) {
03083                 for (y=0; y<ny; y++) {
03084                         int y2;
03085                         if (y<ny/2) y2=y+ny/2;
03086                         else y2=y-ny/2;
03087                         image->set_value_at(x,y,ff->get_value_at(x*2-nx,y2)/norm);
03088                 }
03089         }
03090 
03091         image->update();
03092         if( ff )
03093         {
03094                 delete ff;
03095                 ff = 0;
03096         }
03097 }


Member Data Documentation

const string RealToFFTProcessor::NAME = "math.realtofft" [static]
 

Definition at line 134 of file processor.cpp.


The documentation for this class was generated from the following files:
Generated on Mon Aug 13 13:42:11 2012 for EMAN2 by  doxygen 1.3.9.1