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 3738 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 3753 of file processor.h.

03754                 {
03755                         return "This will replace the image with a full-circle 2D fft amplitude rendering. Note that this renders amplitude, when intensity is more common.";
03756                 }

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 3743 of file processor.h.

References NAME.

Referenced by process_inplace().

03744                 {
03745                         return NAME;
03746                 }

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

Definition at line 3748 of file processor.h.

03749                 {
03750                         return new RealToFFTProcessor();
03751                 }

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 2871 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.

02872 {
02873         if (!image) {
02874                 LOGWARN("NULL Image");
02875                 return;
02876         }
02877 
02878         //Note : real image only!
02879         if(image->is_complex()) {
02880                 LOGERR("%s Processor only operates on real images", get_name().c_str());
02881                 throw ImageFormatException("apply to real image only");
02882         }
02883 
02884         // Note : 2D only!
02885         int nz = image->get_zsize();
02886         if (nz > 1) {
02887                 LOGERR("%s Processor doesn't support 3D models", get_name().c_str());
02888                 throw ImageDimensionException("3D model not supported");
02889         }
02890 
02891         EMData *ff=image->do_fft();
02892         ff->ri2ap();
02893 
02894         int nx=image->get_xsize();
02895         int ny=image->get_ysize();
02896 
02897         int x,y;
02898         float norm=static_cast<float>(nx*ny);
02899 
02900         for (y=0; y<ny; y++) image->set_value_at(0,y,0);
02901 
02902         for (x=1; x<nx/2; x++) {
02903                 for (y=0; y<ny; y++) {
02904                         int y2;
02905                         if (y<ny/2) y2=y+ny/2;
02906                         else if (y==ny/2) y2=ny;
02907                         else y2=y-ny/2;
02908                         image->set_value_at(x,y,ff->get_value_at(nx-x*2,ny-y2)/norm);
02909                 }
02910         }
02911 
02912         for (x=nx/2; x<nx; x++) {
02913                 for (y=0; y<ny; y++) {
02914                         int y2;
02915                         if (y<ny/2) y2=y+ny/2;
02916                         else y2=y-ny/2;
02917                         image->set_value_at(x,y,ff->get_value_at(x*2-nx,y2)/norm);
02918                 }
02919         }
02920 
02921         image->update();
02922         if( ff )
02923         {
02924                 delete ff;
02925                 ff = 0;
02926         }
02927 }


Member Data Documentation

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

Definition at line 3758 of file processor.h.

Referenced by get_name().


The documentation for this class was generated from the following files:
Generated on Tue May 25 17:17:02 2010 for EMAN2 by  doxygen 1.4.7