EMAN::FourierAnlProcessor Class Reference

Same as FourierProcessor, except first computes the current image radial power spectrum and passes it to the processor (no radial oversampling, number of elements = radius). More...

#include <processor.h>

Inheritance diagram for EMAN::FourierAnlProcessor:

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Collaboration diagram for EMAN::FourierAnlProcessor:

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List of all members.

Public Member Functions

void process_inplace (EMData *image)
 To process an image in-place.
TypeDict get_param_types () const
 Get processor parameter information in a dictionary.

Static Public Member Functions

static string get_group_desc ()
 Get the description of this group of processors.

Protected Member Functions

virtual void preprocess (EMData *)
virtual void create_radial_func (vector< float > &radial_mask, EMData *image) const =0

Detailed Description

Same as FourierProcessor, except first computes the current image radial power spectrum and passes it to the processor (no radial oversampling, number of elements = radius).

Parameters:
cutoff_abs Processor radius in terms of Nyquist (0-.5).
cutoff_pixels Width in Fourier pixels (0 - size()/2).
cutoff_freq Resolution in 1/A (0 - 1 / size*apix).
apix Override A/pix in the image header (changes x,y and z).

Definition at line 368 of file processor.h.


Member Function Documentation

virtual void EMAN::FourierAnlProcessor::create_radial_func ( vector< float > &  radial_mask,
EMData image 
) const [protected, pure virtual]

Implemented in EMAN::LowpassAutoBProcessor, EMAN::HighpassAutoPeakProcessor, EMAN::MatchSFProcessor, and EMAN::SetSFProcessor.

Referenced by process_inplace().

static string EMAN::FourierAnlProcessor::get_group_desc (  )  [inline, static]

Get the description of this group of processors.

This function is defined in a parent class. It gives a introduction to a group of processors.

Returns:
The description of this group of processors.

Reimplemented from EMAN::Processor.

Definition at line 373 of file processor.h.

00374                 {
00375                         return "Fourier Filter processors are a group of processor in the frequency domain. Before using such processors on an image, the image must be transformed from real space to the fourier space. FourierProcessor class is the base class of fourier space processors. Each specific processor is either a lowpass filter processor, or a highpass filter processor, or neighter. The unit of lowpass and highpass parameters are in terms of Nyquist, valid range is [0,0.5]. ";
00376                 }

TypeDict EMAN::FourierAnlProcessor::get_param_types (  )  const [inline, virtual]

Get processor parameter information in a dictionary.

Each parameter has one record in the dictionary. Each record contains its name, data-type, and description.

Returns:
A dictionary containing the parameter info.

Reimplemented from EMAN::Processor.

Reimplemented in EMAN::LowpassAutoBProcessor, EMAN::MatchSFProcessor, and EMAN::SetSFProcessor.

Definition at line 378 of file processor.h.

References EMAN::EMObject::FLOAT, and EMAN::TypeDict::put().

Referenced by EMAN::LowpassAutoBProcessor::get_param_types().

00379                 {
00380                         TypeDict d;
00381                         d.put("cutoff_abs", EMObject::FLOAT, "Processor radius in terms of Nyquist (0-.5)");
00382                         d.put("cutoff_pixels", EMObject::FLOAT, " Width in Fourier pixels (0 - size()/2)");
00383                         d.put("cutoff_freq", EMObject::FLOAT, "Resolution in 1/A (0 - 1 / size*apix)");
00384                         d.put("apix", EMObject::FLOAT, " Override A/pix in the image header (changes x,y and z)");
00385                         return d;
00386                 }

virtual void EMAN::FourierAnlProcessor::preprocess ( EMData  )  [inline, protected, virtual]

Reimplemented in EMAN::LowpassAutoBProcessor, and EMAN::HighpassAutoPeakProcessor.

Definition at line 389 of file processor.h.

Referenced by process_inplace().

00389 {}

void FourierAnlProcessor::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 589 of file processor.cpp.

References EMAN::EMData::apply_radial_func(), EMAN::EMData::calc_radial_dist(), create_radial_func(), EMAN::EMData::do_fft(), EMAN::EMData::do_ift(), EMAN::EMData::get_data(), EMAN::EMData::get_xsize(), EMAN::EMData::get_ysize(), EMAN::EMData::get_zsize(), EMAN::EMData::is_complex(), LOGWARN, preprocess(), and EMAN::EMData::update().

00590 {
00591         if (!image) {
00592                 LOGWARN("NULL Image");
00593                 return;
00594         }
00595 
00596         preprocess(image);
00597 
00598 //      int array_size = FFTRADIALOVERSAMPLE * image->get_ysize();
00599 //      float step=0.5f/array_size;
00600 //
00601 //      vector < float >yarray(array_size);
00602 
00603 
00604         if (image->is_complex()) {
00605                 vector <float>yarray = image->calc_radial_dist(image->get_ysize()/2,0,1.0,1);
00606                 create_radial_func(yarray,image);
00607                 image->apply_radial_func(0, 0.5f/yarray.size(), yarray);
00608         }
00609         else {
00610                 EMData *fft = image->do_fft();
00611                 vector <float>yarray = fft->calc_radial_dist(fft->get_ysize()/2,0,1.0,1);
00612                 create_radial_func(yarray,image);
00613                 fft->apply_radial_func(0,  0.5f/yarray.size(), yarray,0);               // 4/30/10 stevel turned off interpolation to fix problem with matched filter
00614                 EMData *ift = fft->do_ift();
00615 
00616                 memcpy(image->get_data(),ift->get_data(),ift->get_xsize()*ift->get_ysize()*ift->get_zsize()*sizeof(float));
00617 
00618                 //ift->update(); Unecessary
00619 
00620                 delete fft;
00621                 delete ift;
00622 
00623         }
00624 
00625         image->update();
00626 }


The documentation for this class was generated from the following files:
Generated on Tue Jul 12 13:48:33 2011 for EMAN2 by  doxygen 1.4.7