#include <processor.h>
Inheritance diagram for EMAN::FourierProcessor:
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 *image) |
virtual void | create_radial_func (vector< float > &radial_mask) const =0 |
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 336 of file processor.h.
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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.
Reimplemented from EMAN::Processor. Reimplemented in EMAN::LowpassFourierProcessor, and EMAN::HighpassFourierProcessor. Definition at line 341 of file processor.h. 00342 { 00343 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]. "; 00344 }
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Get processor parameter information in a dictionary. Each parameter has one record in the dictionary. Each record contains its name, data-type, and description.
Reimplemented from EMAN::Processor. Reimplemented in EMAN::LowpassFourierProcessor, EMAN::HighpassFourierProcessor, and EMAN::LinearRampProcessor. Definition at line 346 of file processor.h. References EMAN::EMObject::FLOAT, and EMAN::TypeDict::put(). Referenced by EMAN::HighpassFourierProcessor::get_param_types(), and EMAN::LowpassFourierProcessor::get_param_types(). 00347 { 00348 TypeDict d; 00349 d.put("cutoff_abs", EMObject::FLOAT, "Processor radius in terms of Nyquist (0-.5)"); 00350 d.put("cutoff_pixels", EMObject::FLOAT, " Width in Fourier pixels (0 - size()/2)"); 00351 d.put("cutoff_freq", EMObject::FLOAT, "Resolution in 1/A (0 - 1 / size*apix)"); 00352 d.put("apix", EMObject::FLOAT, " Override A/pix in the image header (changes x,y and z)"); 00353 return d; 00354 }
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Reimplemented in EMAN::LowpassFourierProcessor, and EMAN::HighpassFourierProcessor. Definition at line 357 of file processor.h. Referenced by process_inplace().
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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.
Implements EMAN::Processor. Definition at line 538 of file processor.cpp. References EMAN::EMData::apply_radial_func(), create_radial_func(), EMAN::EMData::do_fft(), EMAN::EMData::do_ift(), FFTRADIALOVERSAMPLE, 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(). 00539 { 00540 if (!image) { 00541 LOGWARN("NULL Image"); 00542 return; 00543 } 00544 00545 preprocess(image); 00546 00547 int array_size = FFTRADIALOVERSAMPLE * image->get_ysize(); 00548 float step=0.5f/array_size; 00549 00550 vector < float >yarray(array_size); 00551 00552 create_radial_func(yarray); 00553 00554 if (image->is_complex()) { 00555 image->apply_radial_func(0, step, yarray); 00556 } 00557 else { 00558 EMData *fft = image->do_fft(); 00559 fft->apply_radial_func(0, step, yarray); 00560 EMData *ift = fft->do_ift(); 00561 00562 memcpy(image->get_data(),ift->get_data(),ift->get_xsize()*ift->get_ysize()*ift->get_zsize()*sizeof(float)); 00563 00564 //ift->update(); Unecessary 00565 00566 if( fft ) 00567 { 00568 delete fft; 00569 fft = 0; 00570 } 00571 00572 if( ift ) 00573 { 00574 delete ift; 00575 ift = 0; 00576 } 00577 } 00578 00579 image->update(); 00580 }
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