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EMAN::RotationalSubstractProcessor Class Reference

subtracts circularly symmetric part of an image. More...

#include <processor.h>

Inheritance diagram for EMAN::RotationalSubstractProcessor:

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Collaboration diagram for EMAN::RotationalSubstractProcessor:

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List of all members.

Public Member Functions

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

Static Public Member Functions

ProcessorNEW ()

Static Public Attributes

const string NAME = "math.rotationalsubtract"

Detailed Description

subtracts circularly symmetric part of an image.

Definition at line 4462 of file processor.h.


Member Function Documentation

virtual string EMAN::RotationalSubstractProcessor::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 4477 of file processor.h.

04478                 {
04479                         return "subtracts circularly/spherically symmetric part of an image.";
04480                 }

virtual string EMAN::RotationalSubstractProcessor::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 4467 of file processor.h.

04468                 {
04469                         return NAME;
04470                 }

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

Definition at line 4472 of file processor.h.

04473                 {
04474                         return new RotationalSubstractProcessor();
04475                 }

void RotationalSubstractProcessor::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 4244 of file processor.cpp.

References EMAN::EMData::calc_radial_dist(), dist(), EMAN::EMData::get_data(), EMAN::EMData::get_ndim(), EMAN::EMData::get_xsize(), EMAN::EMData::get_ysize(), ImageDimensionException, EMAN::EMData::is_complex(), LOGWARN, nx, ny, rdata, EMAN::EMData::update(), x, and y.

04245 {
04246         if (!image || image->is_complex()) {
04247                 LOGWARN("only works on real image. do nothing.");
04248                 return;
04249         }
04250 
04251         if (image->get_ndim() != 2) throw ImageDimensionException("This processor works only for 2D images");
04252 
04253         float *rdata = image->get_data();
04254         int nx = image->get_xsize();
04255         int ny = image->get_ysize();
04256 
04257         vector < float >dist = image->calc_radial_dist(nx / 2, 0, 1,0);
04258 
04259         int c = 0;
04260         for (int y = 0; y < ny; y++) {
04261                 for (int x = 0; x < nx; x++, c++) {
04262 #ifdef  _WIN32
04263                         float r = (float) _hypot(x - nx / 2, y - ny / 2);
04264 #else
04265                         float r = (float) hypot(x - nx / 2, y - ny / 2);
04266 #endif
04267                         int i = (int) floor(r);
04268                         r -= i;
04269                         if (i >= 0 && i < nx / 2 - 1) {
04270                                 rdata[c] -= dist[i] * (1.0f - r) + dist[i + 1] * r;
04271                         }
04272                         else {
04273                                 rdata[c] = 0;
04274                         }
04275                 }
04276         }
04277 
04278         image->update();
04279 }


Member Data Documentation

const string RotationalSubstractProcessor::NAME = "math.rotationalsubtract" [static]
 

Definition at line 156 of file processor.cpp.


The documentation for this class was generated from the following files:
Generated on Thu Nov 17 12:46:22 2011 for EMAN2 by  doxygen 1.3.9.1