C1DScalar Class Reference

A class for general scaling of one-dimensional arrays. More...

#include <mia/core/scaler1d.hh>

Public Types
typedef std::vector< double >	std_double_vector

Public Member Functions
	C1DScalar (const CSplineKernel &kernel, size_t in_size, size_t out_size)
	C1DScalar (const CSplineKernel &kernel, size_t in_size, double scale)
size_t	get_output_size () const
std_double_vector::iterator	input_begin ()
std_double_vector::iterator	input_end ()
void	operator() (const std_double_vector &input, std_double_vector &output) const
std_double_vector::iterator	output_begin ()
std_double_vector::iterator	output_end ()
void	run ()

Detailed Description

A class for general scaling of one-dimensional arrays.

Class for general scaling of one-dimensional arrays. kernels are the separable B-spline functions. For upscaling, an interpolator is created by using the provided interpolator factory. Downscaling is done solving an overdetermined linear system of equations Ax = y. At construction time the matrix A is QR decomposed, and later the downscaling is done by solving QRx=y

Todo:

see if scaling can be expressed by a filter

seems like downscaling isn't done properly

Definition at line 47 of file scaler1d.hh.

Member Typedef Documentation

std_double_vector

typedef std::vector<double> C1DScalar::std_double_vector

Definition at line 49 of file scaler1d.hh.

Constructor & Destructor Documentation

C1DScalar() [1/2]

C1DScalar::C1DScalar	(	const CSplineKernel &	kernel,
		size_t	in_size,
		size_t	out_size
	)

Create the scaler prividing the given interpolator kernel.

Parameters

kernel	interpolation kernel
in_size
out_size	the input will be scaled to the given size, the scale is set accordingly

C1DScalar() [2/2]

C1DScalar::C1DScalar	(	const CSplineKernel &	kernel,
		size_t	in_size,
		double	scale
	)

Create the scaler providing the given interpolator kernel.

Parameters

kernel	interpolation kernel
in_size
scale	factor by which tho scale the input size, the interpolation will be exact with respect to the scale

Member Function Documentation

get_output_size()

size_t C1DScalar::get_output_size

(

)

const

Returns

the size of the output vector

input_begin()

std_double_vector::iterator C1DScalar::input_begin

(

)

Returns

begin iterator of the input buffer

input_end()

std_double_vector::iterator C1DScalar::input_end

(

)

Returns

end iterator of the input buffer

operator()()

void C1DScalar::operator()	(	const std_double_vector &	input,
		std_double_vector &	output
	)		const

Scaling operator.

Parameters

	input	input data
[out]	output	when calling the function, the size of this vector must be set to the requested size. The path for down or upscaling is automatically selected.

output_begin()

std_double_vector::iterator C1DScalar::output_begin

(

)

Returns

begin iterator of the output buffer

output_end()

std_double_vector::iterator C1DScalar::output_end

(

)

Returns

end iterator of the output buffer

run()

void C1DScalar::run

(

)

Alternate interface for scaling. Here the input data has to be copied into the pre-acclocated memory by using the input_begin() and input_end() iterators, and the result can be read using the output_begin(), output_end() iterators.

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

• scaler1d.hh