Detailed Description

Calculates and stores Gaussian kernel parameters as a function of a specufuc radius.

Public Member Functions
	KernelParameters (float resolution)
float	get_inv_rsigsq () const
	Get the inverse of sigma sqaured.
float	get_lim () const
	Gets the value of lim parameter.
const RadiusDependentKernelParameters &	get_params (float radius, float eps=0.001)
	Finds the precomputed parameters given a particle radius.
float	get_rkdist () const
	Get the lenght of the Gaussian (sigma*number_of_sigmas_used)
float	get_rnormfac () const
	Get the Gaussian normalization factor.
float	get_rsig () const
float	get_rsigsq () const
float	get_sq2pi3 () const
	Get the non-sigma portion of the Gaussian normalization factor.
float	get_timessig () const
	Gets the number of sigma used.
const RadiusDependentKernelParameters &	set_params (float radius)
	Sets the parameters that depend on the radius of a given particle.
void	show (std::ostream &out=std::cout) const

Protected Member Functions
void	init (float resolution)

Protected Attributes
bool	initialized_
float	inv_rsigsq_
float	lim_
std::map< float, const RadiusDependentKernelParameters * >	radii2params_
float	rkdist_
float	rnormfac_
float	rsig_
float	rsigsq_
float	sq2pi3_
float	timessig_

Member Function Documentation

float IMP::em::KernelParameters::get_inv_rsigsq ( ) const

Get the inverse of sigma sqaured.

float IMP::em::KernelParameters::get_lim ( ) const

Gets the value of lim parameter.

const RadiusDependentKernelParameters& IMP::em::KernelParameters::get_params	(	float	radius,
		float	eps = `0.001`
	)

Finds the precomputed parameters given a particle radius.

Parameters:

[in]	radius	searching for parameters of this radius
[in]	eps	used for numerical stability

Note:: The parameters are indexes by the radius. To maintain numeratical stability, look for a radius within +-eps from the queried radius.; if parameters for this radius were not found, a warning is printed and the parameters are calculated using set_params().

float IMP::em::KernelParameters::get_rkdist ( ) const

Get the lenght of the Gaussian (sigma*number_of_sigmas_used)

float IMP::em::KernelParameters::get_rnormfac ( ) const

Get the Gaussian normalization factor.

float IMP::em::KernelParameters::get_rsig ( ) const

Get sigma as a function of the resolution according to th Full width at half maximum criterion

float IMP::em::KernelParameters::get_rsigsq ( ) const

Get squared sigma as a function of the resolution accroding to the Full width at half maximum criterion

float IMP::em::KernelParameters::get_sq2pi3 ( ) const

Get the non-sigma portion of the Gaussian normalization factor.

float IMP::em::KernelParameters::get_timessig ( ) const

Gets the number of sigma used.

const RadiusDependentKernelParameters& IMP::em::KernelParameters::set_params ( float radius )

Sets the parameters that depend on the radius of a given particle.

The other variables of the parameters (rsigsq,timessig,sq2pi3,inv_rsigsq,rnormfac,rkdist) must have been set.

Parameters:

[in] radius the radius

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