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

static ProcessorNEW ()

Static Public Attributes

static const string NAME = "math.realtofft"

Detailed Description

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

Definition at line 3772 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 3787 of file processor.h.

03788                 {
03789                         return "This will replace the image with a full-circle 2D fft amplitude rendering. Note that this renders amplitude, when intensity is more common.";
03790                 }

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 3777 of file processor.h.

References NAME.

Referenced by process_inplace().

03778                 {
03779                         return NAME;
03780                 }

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

Definition at line 3782 of file processor.h.

03783                 {
03784                         return new RealToFFTProcessor();
03785                 }

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 2965 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(), EMAN::EMData::ri2ap(), EMAN::EMData::set_value_at(), EMAN::EMData::update(), and x.

02966 {
02967         if (!image) {
02968                 LOGWARN("NULL Image");
02969                 return;
02970         }
02971 
02972         //Note : real image only!
02973         if(image->is_complex()) {
02974                 LOGERR("%s Processor only operates on real images", get_name().c_str());
02975                 throw ImageFormatException("apply to real image only");
02976         }
02977 
02978         // Note : 2D only!
02979         int nz = image->get_zsize();
02980         if (nz > 1) {
02981                 LOGERR("%s Processor doesn't support 3D models", get_name().c_str());
02982                 throw ImageDimensionException("3D model not supported");
02983         }
02984 
02985         EMData *ff=image->do_fft();
02986         ff->ri2ap();
02987 
02988         int nx=image->get_xsize();
02989         int ny=image->get_ysize();
02990 
02991         int x,y;
02992         float norm=static_cast<float>(nx*ny);
02993 
02994         for (y=0; y<ny; y++) image->set_value_at(0,y,0);
02995 
02996         for (x=1; x<nx/2; x++) {
02997                 for (y=0; y<ny; y++) {
02998                         int y2;
02999                         if (y<ny/2) y2=y+ny/2;
03000                         else if (y==ny/2) y2=ny;
03001                         else y2=y-ny/2;
03002                         image->set_value_at(x,y,ff->get_value_at(nx-x*2,ny-y2)/norm);
03003                 }
03004         }
03005 
03006         for (x=nx/2; x<nx; x++) {
03007                 for (y=0; y<ny; y++) {
03008                         int y2;
03009                         if (y<ny/2) y2=y+ny/2;
03010                         else y2=y-ny/2;
03011                         image->set_value_at(x,y,ff->get_value_at(x*2-nx,y2)/norm);
03012                 }
03013         }
03014 
03015         image->update();
03016         if( ff )
03017         {
03018                 delete ff;
03019                 ff = 0;
03020         }
03021 }


Member Data Documentation

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

Definition at line 3792 of file processor.h.

Referenced by get_name().


The documentation for this class was generated from the following files:
Generated on Thu Nov 17 12:46:26 2011 for EMAN2 by  doxygen 1.4.7