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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 3408 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 3422 of file processor.h.

03423                 {
03424                         return "Gradient remover, does a rough plane fit to find linear gradients.";
03425                 }

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 3413 of file processor.h.

Referenced by process_inplace().

03414                 {
03415                         return NAME;
03416                 }

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

Definition at line 3417 of file processor.h.

03418                 {
03419                         return new GradientRemoverProcessor();
03420                 }

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 2505 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().

02506 {
02507         if (!image) {
02508                 LOGWARN("NULL Image");
02509                 return;
02510         }
02511 
02512         int nz = image->get_zsize();
02513         if (nz > 1) {
02514                 LOGERR("%s Processor doesn't support 3D model", get_name().c_str());
02515                 throw ImageDimensionException("3D model not supported");
02516         }
02517 
02518         int nx = image->get_xsize();
02519         int ny = image->get_ysize();
02520         float *dy = new float[ny];
02521         float m = 0;
02522         float b = 0;
02523         float sum_y = 0;
02524         float *data = image->get_data();
02525 
02526         for (int i = 0; i < ny; i++) {
02527                 Util::calc_least_square_fit(nx, 0, data + i * nx, &m, &b, false);
02528                 dy[i] = b;
02529                 sum_y += m;
02530         }
02531 
02532         float mean_y = sum_y / ny;
02533         float sum_x = 0;
02534         Util::calc_least_square_fit(ny, 0, dy, &sum_x, &b, false);
02535 
02536         for (int j = 0; j < ny; j++) {
02537                 for (int i = 0; i < nx; i++) {
02538                         data[i + j * nx] -= i * sum_x + j * mean_y + b;
02539                 }
02540         }
02541 
02542         image->update();
02543 }


Member Data Documentation

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

Definition at line 123 of file processor.cpp.


The documentation for this class was generated from the following files:
Generated on Thu Dec 9 13:47:59 2010 for EMAN2 by  doxygen 1.3.9.1