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

static ProcessorNEW ()

Static Public Attributes

static const string NAME = "math.lineargradientfix"

Detailed Description

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

Definition at line 3583 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 3597 of file processor.h.

03598                 {
03599                         return "Gradient remover, does a rough plane fit to find linear gradients.";
03600                 }

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 3588 of file processor.h.

References NAME.

Referenced by process_inplace().

03589                 {
03590                         return NAME;
03591                 }

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

Definition at line 3592 of file processor.h.

03593                 {
03594                         return new GradientRemoverProcessor();
03595                 }

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 2560 of file processor.cpp.

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

02561 {
02562         if (!image) {
02563                 LOGWARN("NULL Image");
02564                 return;
02565         }
02566 
02567         int nz = image->get_zsize();
02568         if (nz > 1) {
02569                 LOGERR("%s Processor doesn't support 3D model", get_name().c_str());
02570                 throw ImageDimensionException("3D model not supported");
02571         }
02572 
02573         int nx = image->get_xsize();
02574         int ny = image->get_ysize();
02575         float *dy = new float[ny];
02576         float m = 0;
02577         float b = 0;
02578         float sum_y = 0;
02579         float *data = image->get_data();
02580 
02581         for (int i = 0; i < ny; i++) {
02582                 Util::calc_least_square_fit(nx, 0, data + i * nx, &m, &b, false);
02583                 dy[i] = b;
02584                 sum_y += m;
02585         }
02586 
02587         float mean_y = sum_y / ny;
02588         float sum_x = 0;
02589         Util::calc_least_square_fit(ny, 0, dy, &sum_x, &b, false);
02590 
02591         for (int j = 0; j < ny; j++) {
02592                 for (int i = 0; i < nx; i++) {
02593                         data[i + j * nx] -= i * sum_x + j * mean_y + b;
02594                 }
02595         }
02596 
02597         image->update();
02598 }


Member Data Documentation

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

Definition at line 3602 of file processor.h.

Referenced by get_name().


The documentation for this class was generated from the following files:
Generated on Thu Nov 17 12:46:24 2011 for EMAN2 by  doxygen 1.4.7