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 3819 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 3834 of file processor.h.

03835                 {
03836                         return "This will replace the image with a full-circle 2D fft amplitude rendering. Note that this renders amplitude, when intensity is more common.";
03837                 }

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 3824 of file processor.h.

References NAME.

Referenced by process_inplace().

03825                 {
03826                         return NAME;
03827                 }

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

Definition at line 3829 of file processor.h.

03830                 {
03831                         return new RealToFFTProcessor();
03832                 }

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 3043 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.

03044 {
03045         if (!image) {
03046                 LOGWARN("NULL Image");
03047                 return;
03048         }
03049 
03050         //Note : real image only!
03051         if(image->is_complex()) {
03052                 LOGERR("%s Processor only operates on real images", get_name().c_str());
03053                 throw ImageFormatException("apply to real image only");
03054         }
03055 
03056         // Note : 2D only!
03057         int nz = image->get_zsize();
03058         if (nz > 1) {
03059                 LOGERR("%s Processor doesn't support 3D models", get_name().c_str());
03060                 throw ImageDimensionException("3D model not supported");
03061         }
03062 
03063         EMData *ff=image->do_fft();
03064         ff->ri2ap();
03065 
03066         int nx=image->get_xsize();
03067         int ny=image->get_ysize();
03068 
03069         int x,y;
03070         float norm=static_cast<float>(nx*ny);
03071 
03072         for (y=0; y<ny; y++) image->set_value_at(0,y,0);
03073 
03074         for (x=1; x<nx/2; x++) {
03075                 for (y=0; y<ny; y++) {
03076                         int y2;
03077                         if (y<ny/2) y2=y+ny/2;
03078                         else if (y==ny/2) y2=ny;
03079                         else y2=y-ny/2;
03080                         image->set_value_at(x,y,ff->get_value_at(nx-x*2,ny-y2)/norm);
03081                 }
03082         }
03083 
03084         for (x=nx/2; x<nx; x++) {
03085                 for (y=0; y<ny; y++) {
03086                         int y2;
03087                         if (y<ny/2) y2=y+ny/2;
03088                         else y2=y-ny/2;
03089                         image->set_value_at(x,y,ff->get_value_at(x*2-nx,y2)/norm);
03090                 }
03091         }
03092 
03093         image->update();
03094         if( ff )
03095         {
03096                 delete ff;
03097                 ff = 0;
03098         }
03099 }


Member Data Documentation

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

Definition at line 3839 of file processor.h.

Referenced by get_name().


The documentation for this class was generated from the following files:
Generated on Tue Jun 11 12:44:07 2013 for EMAN2 by  doxygen 1.4.7