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 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.

References NAME.

Referenced by process_inplace().

03823                 {
03824                         return NAME;
03825                 }

static 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 3037 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.

03038 {
03039         if (!image) {
03040                 LOGWARN("NULL Image");
03041                 return;
03042         }
03043 
03044         //Note : real image only!
03045         if(image->is_complex()) {
03046                 LOGERR("%s Processor only operates on real images", get_name().c_str());
03047                 throw ImageFormatException("apply to real image only");
03048         }
03049 
03050         // Note : 2D only!
03051         int nz = image->get_zsize();
03052         if (nz > 1) {
03053                 LOGERR("%s Processor doesn't support 3D models", get_name().c_str());
03054                 throw ImageDimensionException("3D model not supported");
03055         }
03056 
03057         EMData *ff=image->do_fft();
03058         ff->ri2ap();
03059 
03060         int nx=image->get_xsize();
03061         int ny=image->get_ysize();
03062 
03063         int x,y;
03064         float norm=static_cast<float>(nx*ny);
03065 
03066         for (y=0; y<ny; y++) image->set_value_at(0,y,0);
03067 
03068         for (x=1; x<nx/2; x++) {
03069                 for (y=0; y<ny; y++) {
03070                         int y2;
03071                         if (y<ny/2) y2=y+ny/2;
03072                         else if (y==ny/2) y2=ny;
03073                         else y2=y-ny/2;
03074                         image->set_value_at(x,y,ff->get_value_at(nx-x*2,ny-y2)/norm);
03075                 }
03076         }
03077 
03078         for (x=nx/2; x<nx; x++) {
03079                 for (y=0; y<ny; y++) {
03080                         int y2;
03081                         if (y<ny/2) y2=y+ny/2;
03082                         else y2=y-ny/2;
03083                         image->set_value_at(x,y,ff->get_value_at(x*2-nx,y2)/norm);
03084                 }
03085         }
03086 
03087         image->update();
03088         if( ff )
03089         {
03090                 delete ff;
03091                 ff = 0;
03092         }
03093 }


Member Data Documentation

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

Definition at line 3837 of file processor.h.

Referenced by get_name().


The documentation for this class was generated from the following files:
Generated on Thu May 3 10:10:17 2012 for EMAN2 by  doxygen 1.4.7