Discrete approximation to Laplacian. More...

#include <processor.h>

Inheritance diagram for EMAN::LaplacianProcessor:

Collaboration diagram for EMAN::LaplacianProcessor:

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Public Member Functions
string	get_name () const
	Get the processor's name. More...

void	process_inplace (EMData *image)
	To process an image in-place. More...

string	get_desc () const
	Get the descrition of this specific processor. More...

Public Member Functions inherited from EMAN::AreaProcessor
	AreaProcessor ()

void	set_params (const Dict &new_params)
	Set the processor parameters using a key/value dictionary. More...

TypeDict	get_param_types () const
	Get processor parameter information in a dictionary. More...

Public Member Functions inherited from EMAN::Processor
virtual	~Processor ()

virtual EMData *	process (const EMData *const image)
	To proccess an image out-of-place. More...

virtual void	process_list_inplace (vector< EMData * > &images)
	To process multiple images using the same algorithm. More...

virtual Dict	get_params () const
	Get the processor parameters in a key/value dictionary. More...

Static Public Member Functions
static Processor *	NEW ()

Static Public Member Functions inherited from EMAN::Processor
static string	get_group_desc ()
	Get the description of this group of processors. More...

static void	EMFourierFilterInPlace (EMData *fimage, Dict params)
	Compute a Fourier-filter processed image in place. More...

static EMData *	EMFourierFilter (EMData *fimage, Dict params)
	Compute a Fourier-processor processed image without altering the original image. More...

Static Public Attributes
static const string	NAME = "math.laplacian"

Protected Member Functions
void	create_kernel () const

Protected Member Functions inherited from EMAN::AreaProcessor
virtual void	process_pixel (float pixel, float, float, float, float area_matrix) const

Additional Inherited Members
Public Types inherited from EMAN::Processor
enum	fourier_filter_types { TOP_HAT_LOW_PASS , TOP_HAT_HIGH_PASS , TOP_HAT_BAND_PASS , TOP_HOMOMORPHIC , GAUSS_LOW_PASS , GAUSS_HIGH_PASS , GAUSS_BAND_PASS , GAUSS_INVERSE , GAUSS_HOMOMORPHIC , BUTTERWORTH_LOW_PASS , BUTTERWORTH_HIGH_PASS , BUTTERWORTH_HOMOMORPHIC , KAISER_I0 , KAISER_SINH , KAISER_I0_INVERSE , KAISER_SINH_INVERSE , SHIFT , TANH_LOW_PASS , TANH_HIGH_PASS , TANH_HOMOMORPHIC , TANH_BAND_PASS , RADIAL_TABLE , CTF_ }
	Fourier filter Processor type enum. More...

Protected Attributes inherited from EMAN::AreaProcessor
int	areasize

int	matrix_size

float *	kernel

int	nx

int	ny

int	nz

Protected Attributes inherited from EMAN::Processor
Dict	params

Detailed Description

Discrete approximation to Laplacian.

Edge enchancement, but works poorly in the presence of noise. Laplacian processor (x -> d^2/dx^2 + d^2/dy^2 + d^2/dz^2).

Definition at line 4404 of file processor.h.

Member Function Documentation

◆ create_kernel()

void LaplacianProcessor::create_kernel ( ) const

protectedvirtual

Implements EMAN::AreaProcessor.

Definition at line 2577 of file processor.cpp.

{
        if (nz == 1) {
                memset(kernel, 0, areasize * areasize);
                kernel[1] = -0.25f;
                kernel[3] = -0.25f;
                kernel[5] = -0.25f;
                kernel[7] = -0.25f;
                kernel[4] = 1;
        }
        else {
                memset(kernel, 0, (size_t)areasize * areasize * areasize);
                kernel[4] = -1.0f / 6.0f;
                kernel[10] = -1.0f / 6.0f;
                kernel[12] = -1.0f / 6.0f;
                kernel[14] = -1.0f / 6.0f;
                kernel[16] = -1.0f / 6.0f;
                kernel[22] = -1.0f / 6.0f;
                kernel[13] = 1;
        }
}

References EMAN::AreaProcessor::areasize, EMAN::AreaProcessor::kernel, and EMAN::AreaProcessor::nz.

◆ get_desc()

string EMAN::LaplacianProcessor::get_desc ( ) const

inlinevirtual

Get the descrition of this specific processor.

This function must be overwritten by a subclass.

Returns: The description of this processor.

Reimplemented from EMAN::AreaProcessor.

Definition at line 4419 of file processor.h.

                {
                        return "Discrete approximation to Laplacian. Edge enchancement, but works poorly in the presence of noise. Laplacian processor (x -> d^2/dx^2 + d^2/dy^2 + d^2/dz^2).";
                }

◆ get_name()

string EMAN::LaplacianProcessor::get_name ( ) const

inlinevirtual

Get the processor's name.

Each processor is identified by a unique name.

Returns: The processor's name.

Implements EMAN::Processor.

Definition at line 4407 of file processor.h.

                {
                        return NAME;
                }

References NAME.

◆ NEW()

static Processor * EMAN::LaplacianProcessor::NEW ( )

inlinestatic

Definition at line 4414 of file processor.h.

                {
                        return new LaplacianProcessor();
                }

◆ process_inplace()

void LaplacianProcessor::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.

Reimplemented from EMAN::AreaProcessor.

Definition at line 2565 of file processor.cpp.

{
        EMData* d = new EMData();
        d = image->process("math.edge.xgradient");
        d->process_inplace("math.edge.xgradient");
        image->process_inplace("math.edge.ygradient");
        image->process_inplace("math.edge.xgradient");
        image->add(*d);
        image->process_inplace("normalize");
        delete d;
}

Member Data Documentation

◆ NAME

const string LaplacianProcessor::NAME = "math.laplacian"

static

Definition at line 4424 of file processor.h.

Referenced by get_name().

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

Public Member Functions

Static Public Member Functions

Static Public Attributes

Protected Member Functions

Additional Inherited Members