EMAN::TestImagePureGaussian Class Reference

Replace a source image as a strict Gaussian. More...

#include <processor.h>

Inheritance diagram for EMAN::TestImagePureGaussian:

[legend]

Collaboration diagram for EMAN::TestImagePureGaussian:

[legend]

List of all members.

Public Member Functions
virtual void	process_inplace (EMData *image)
	To process an image in-place.
virtual string	get_name () const
	Get the processor's name.
virtual string	get_desc () const
	Get the descrition of this specific processor.
virtual TypeDict	get_param_types () const
	Get processor parameter information in a dictionary.
Static Public Member Functions
static Processor *	NEW ()

---

Detailed Description

Replace a source image as a strict Gaussian.

Parameters:

	x_sigma	sigma value for this Gaussian blob on x direction
	y_sigma	sigma value for this Gaussian blob on y direction
	z_sigma	sigma value for this Gaussian blob on z direction
	x_center	center for this Gaussian blob on x direction
	y_center	center for this Gaussian blob on y direction
	z_center	center for this Gaussian blob on z direction

Definition at line 5432 of file processor.h.

---

Member Function Documentation

void TestImagePureGaussian::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 6720 of file processor.cpp.

References EMAN::EMData::get_xsize(), EMAN::EMData::get_ysize(), EMAN::EMData::get_zsize(), norm(), EMAN::Processor::params, pi, EMAN::TestImageProcessor::preprocess(), sqrt(), EMAN::EMData::update(), and x.

{
        preprocess(image);

        float x_sigma = params["x_sigma"];
        float y_sigma = params["y_sigma"];
        float z_sigma = params["z_sigma"];

        float x_center = params["x_center"];
        float y_center = params["y_center"];
        float z_center = params["z_center"];

        int nx = image->get_xsize();
        int ny = image->get_ysize();
        int nz = image->get_zsize();

        float x_twosig2 = 2*x_sigma*x_sigma;
        float y_twosig2 = 2*y_sigma*y_sigma;
        float z_twosig2 = 2*z_sigma*z_sigma;

        float sr2pi = sqrt( 2.0f*(float)pi );
        float norm  = 1.0f/ ( x_sigma*sr2pi );
        if (ny > 1) {
                norm *= 1.0f/ ( y_sigma*sr2pi );
                if (nz > 1) norm  *= 1.0f/ ( z_sigma*sr2pi );
        }

        float z, y, x, sum, val;
        for (int iz=0; iz < nz; ++iz) {
                z = static_cast<float>(iz) - z_center;
                for (int iy=0; iy < ny; ++iy) {
                        y = static_cast<float>(iy) - y_center;
                        for (int ix=0; ix < nx; ++ix) {
                                x = static_cast<float>(ix) - x_center;
                                sum = x*x/x_twosig2 + y*y/y_twosig2 + z*z/z_twosig2;
                                val = norm*exp(-sum);
                                (*image)(ix,iy,iz) = val;
                        }
                }
        }
        image->update();
}

virtual string EMAN::TestImagePureGaussian::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 5437 of file processor.h.

                {
                        return "testimage.puregaussian";
                }

virtual string EMAN::TestImagePureGaussian::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 5442 of file processor.h.

                {
                        return "Replace a source image as a strict Gaussian ";
                }

static Processor* EMAN::TestImagePureGaussian::NEW

(

)

[inline, static]

Definition at line 5447 of file processor.h.

                {
                        return new TestImagePureGaussian();
                }

virtual TypeDict EMAN::TestImagePureGaussian::get_param_types

(

)

const [inline, virtual]

Get processor parameter information in a dictionary.

Each parameter has one record in the dictionary. Each record contains its name, data-type, and description.

Returns:

A dictionary containing the parameter info.

Reimplemented from EMAN::Processor.

Definition at line 5452 of file processor.h.

References EMAN::EMObject::FLOAT, and EMAN::TypeDict::put().

                {
                        TypeDict d;
                        d.put("x_sigma", EMObject::FLOAT, "sigma value for this Gaussian blob on x direction");
                        d.put("y_sigma", EMObject::FLOAT, "sigma value for this Gaussian blob on y direction");
                        d.put("z_sigma", EMObject::FLOAT, "sigma value for this Gaussian blob on z direction");
                        d.put("x_center", EMObject::FLOAT, "center for this Gaussian blob on x direction" );
                        d.put("y_center", EMObject::FLOAT, "center for this Gaussian blob on y direction" );
                        d.put("z_center", EMObject::FLOAT, "center for this Gaussian blob on z direction" );
                        return d;
                }

---

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

• processor.h
• processor.cpp