EMAN::RotationalAverageProcessor Class Reference

makes image circularly symmetric. More...

#include <processor.h>

Inheritance diagram for EMAN::RotationalAverageProcessor:

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Collaboration diagram for EMAN::RotationalAverageProcessor:

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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.rotationalaverage"

Detailed Description

makes image circularly symmetric.

Definition at line 4368 of file processor.h.


Member Function Documentation

string EMAN::RotationalAverageProcessor::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 4383 of file processor.h.

04384                 {
04385                         return "Makes image circularly/spherically symmetric.";
04386                 }

string EMAN::RotationalAverageProcessor::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 4373 of file processor.h.

References NAME.

04374                 {
04375                         return NAME;
04376                 }

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

Definition at line 4378 of file processor.h.

04379                 {
04380                         return new RotationalAverageProcessor();
04381                 }

void RotationalAverageProcessor::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 4126 of file processor.cpp.

References EMAN::EMData::calc_radial_dist(), dist(), EMAN::Util::fast_floor(), EMAN::EMData::get_data(), EMAN::EMData::get_ndim(), EMAN::EMData::get_xsize(), EMAN::EMData::get_ysize(), EMAN::EMData::get_zsize(), EMAN::Util::hypot3(), ImageDimensionException, EMAN::EMData::is_complex(), LOGWARN, rdata, EMAN::EMData::update(), and x.

04127 {
04128         if (!image || image->is_complex()) {
04129                 LOGWARN("only works on real image. do nothing.");
04130                 return;
04131         }
04132 
04133         if (image->get_ndim() <= 0 || image->get_ndim() > 3)    throw ImageDimensionException("radial average processor only works for 2D and 3D images");
04134 
04135         float *rdata = image->get_data();
04136         int nx = image->get_xsize();
04137         int ny = image->get_ysize();
04138 
04139         vector < float >dist = image->calc_radial_dist(nx / 2, 0, 1,0);
04140 
04141         float midx = (float)((int)nx/2);
04142         float midy = (float)((int)ny/2);
04143 
04144         size_t c = 0;
04145         if (image->get_ndim() == 2) {
04146                 for (int y = 0; y < ny; y++) {
04147                         for (int x = 0; x < nx; x++, c++) {
04148         #ifdef  _WIN32
04149                                 float r = (float) _hypot(x - midx, y - midy);
04150         #else
04151                                 float r = (float) hypot(x - midx, y - midy);
04152         #endif  //_WIN32
04153 
04154 
04155                                 int i = (int) floor(r);
04156                                 r -= i;
04157                                 if (i >= 0 && i < nx / 2 - 1) {
04158                                         rdata[c] = dist[i] * (1.0f - r) + dist[i + 1] * r;
04159                                 }
04160                                 else if (i < 0) {
04161                                         rdata[c] = dist[0];
04162                                 }
04163                                 else {
04164                                         rdata[c] = 0;
04165                                 }
04166                         }
04167                 }
04168         }
04169         else if (image->get_ndim() == 3) {
04170                 int nz = image->get_zsize();
04171                 float midz = (float)((int)nz/2);
04172                 float r;
04173                 int i;
04174                 for (int z = 0; z < nz; ++z) {
04175                         for (int y = 0; y < ny; ++y) {
04176                                 for (int x = 0; x < nx; ++x, ++c) {
04177 
04178                                         r = (float) Util::hypot3(x - midx, y - midy, z - midz);
04179 
04180                                         i = Util::fast_floor(r);
04181                                         r -= i;
04182                                         if (i >= 0 && i < nx / 2 - 1) {
04183                                                 rdata[c] = dist[i] * (1.0f - r) + dist[i + 1] * r;
04184                                         }
04185                                         else if (i < 0) {
04186                                                 rdata[c] = dist[0];
04187                                         }
04188                                         else {
04189                                                 rdata[c] = 0;
04190                                         }
04191                                 }
04192                         }
04193                 }
04194         }
04195 
04196         image->update();
04197 }


Member Data Documentation

const string RotationalAverageProcessor::NAME = "math.rotationalaverage" [static]

Definition at line 4388 of file processor.h.

Referenced by get_name().


The documentation for this class was generated from the following files:
Generated on Mon May 2 13:30:41 2011 for EMAN2 by  doxygen 1.4.7