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EMAN::GradientRemoverProcessor Class Reference

Gradient remover, does a rough plane fit to find linear gradients. More...

#include <processor.h>

Inheritance diagram for EMAN::GradientRemoverProcessor:

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Collaboration diagram for EMAN::GradientRemoverProcessor:
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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

ProcessorNEW ()

Static Public Attributes

const string NAME = "math.lineargradientfix"

Detailed Description

Gradient remover, does a rough plane fit to find linear gradients.

Definition at line 3584 of file processor.h.


Member Function Documentation

string EMAN::GradientRemoverProcessor::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 3598 of file processor.h.

03599                 {
03600                         return "Gradient remover, does a rough plane fit to find linear gradients.";
03601                 }

string EMAN::GradientRemoverProcessor::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 3589 of file processor.h.

Referenced by process_inplace().

03590                 {
03591                         return NAME;
03592                 }

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

Definition at line 3593 of file processor.h.

03594                 {
03595                         return new GradientRemoverProcessor();
03596                 }

void GradientRemoverProcessor::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 2550 of file processor.cpp.

References b, EMAN::Util::calc_least_square_fit(), data, EMAN::EMData::get_data(), get_name(), EMAN::EMData::get_xsize(), EMAN::EMData::get_ysize(), EMAN::EMData::get_zsize(), ImageDimensionException, LOGERR, LOGWARN, nx, ny, and EMAN::EMData::update().

02551 {
02552         if (!image) {
02553                 LOGWARN("NULL Image");
02554                 return;
02555         }
02556 
02557         int nz = image->get_zsize();
02558         if (nz > 1) {
02559                 LOGERR("%s Processor doesn't support 3D model", get_name().c_str());
02560                 throw ImageDimensionException("3D model not supported");
02561         }
02562 
02563         int nx = image->get_xsize();
02564         int ny = image->get_ysize();
02565         float *dy = new float[ny];
02566         float m = 0;
02567         float b = 0;
02568         float sum_y = 0;
02569         float *data = image->get_data();
02570 
02571         for (int i = 0; i < ny; i++) {
02572                 Util::calc_least_square_fit(nx, 0, data + i * nx, &m, &b, false);
02573                 dy[i] = b;
02574                 sum_y += m;
02575         }
02576 
02577         float mean_y = sum_y / ny;
02578         float sum_x = 0;
02579         Util::calc_least_square_fit(ny, 0, dy, &sum_x, &b, false);
02580 
02581         for (int j = 0; j < ny; j++) {
02582                 for (int i = 0; i < nx; i++) {
02583                         data[i + j * nx] -= i * sum_x + j * mean_y + b;
02584                 }
02585         }
02586 
02587         image->update();
02588 }


Member Data Documentation

const string GradientRemoverProcessor::NAME = "math.lineargradientfix" [static]
 

Definition at line 128 of file processor.cpp.


The documentation for this class was generated from the following files:
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