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 4482 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 4497 of file processor.h.

04498                 {
04499                         return "Makes image circularly/spherically symmetric.";
04500                 }

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 4487 of file processor.h.

References NAME.

04488                 {
04489                         return NAME;
04490                 }

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

Definition at line 4492 of file processor.h.

04493                 {
04494                         return new RotationalAverageProcessor();
04495                 }

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 4241 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.

04242 {
04243         if (!image || image->is_complex()) {
04244                 LOGWARN("only works on real image. do nothing.");
04245                 return;
04246         }
04247 
04248         if (image->get_ndim() <= 0 || image->get_ndim() > 3)    throw ImageDimensionException("radial average processor only works for 2D and 3D images");
04249 
04250         float *rdata = image->get_data();
04251         int nx = image->get_xsize();
04252         int ny = image->get_ysize();
04253 
04254         vector < float >dist = image->calc_radial_dist(nx / 2, 0, 1,0);
04255 
04256         float midx = (float)((int)nx/2);
04257         float midy = (float)((int)ny/2);
04258 
04259         size_t c = 0;
04260         if (image->get_ndim() == 2) {
04261                 for (int y = 0; y < ny; y++) {
04262                         for (int x = 0; x < nx; x++, c++) {
04263         #ifdef  _WIN32
04264                                 float r = (float) _hypot(x - midx, y - midy);
04265         #else
04266                                 float r = (float) hypot(x - midx, y - midy);
04267         #endif  //_WIN32
04268 
04269 
04270                                 int i = (int) floor(r);
04271                                 r -= i;
04272                                 if (i >= 0 && i < nx / 2 - 1) {
04273                                         rdata[c] = dist[i] * (1.0f - r) + dist[i + 1] * r;
04274                                 }
04275                                 else if (i < 0) {
04276                                         rdata[c] = dist[0];
04277                                 }
04278                                 else {
04279                                         rdata[c] = 0;
04280                                 }
04281                         }
04282                 }
04283         }
04284         else if (image->get_ndim() == 3) {
04285                 int nz = image->get_zsize();
04286                 float midz = (float)((int)nz/2);
04287                 float r;
04288                 int i;
04289                 for (int z = 0; z < nz; ++z) {
04290                         for (int y = 0; y < ny; ++y) {
04291                                 for (int x = 0; x < nx; ++x, ++c) {
04292 
04293                                         r = (float) Util::hypot3(x - midx, y - midy, z - midz);
04294 
04295                                         i = Util::fast_floor(r);
04296                                         r -= i;
04297                                         if (i >= 0 && i < nx / 2 - 1) {
04298                                                 rdata[c] = dist[i] * (1.0f - r) + dist[i + 1] * r;
04299                                         }
04300                                         else if (i < 0) {
04301                                                 rdata[c] = dist[0];
04302                                         }
04303                                         else {
04304                                                 rdata[c] = 0;
04305                                         }
04306                                 }
04307                         }
04308                 }
04309         }
04310 
04311         image->update();
04312 }


Member Data Documentation

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

Definition at line 4502 of file processor.h.

Referenced by get_name().


The documentation for this class was generated from the following files:
Generated on Thu May 3 10:10:28 2012 for EMAN2 by  doxygen 1.4.7