Pyramid tools

Collaboration diagram for Pyramid tools:

Functions
int	GetPyramidFilter (const char *Filter, long int Order, double g[], long int *ng, double h[], long int *nh, short *FlagCentered)
int	Reduce_2D (double *In, long int NxIn, long int NyIn, double *Out, double w[], long int nw, short FlagCentered)
int	Reduce_3D (double *In, long int NxIn, long int NyIn, long int NzIn, double *Out, double w[], long int nw, short FlagCentered)
int	Expand_2D (double *In, long int NxIn, long int NyIn, double *Out, double h[], long int nh, short FlagCentered)
int	Expand_3D (double *In, long int NxIn, long int NyIn, long int NzIn, double *Out, double h[], long int nh, short FlagCentered)
void	Reduce_1D (double x[], long int nx, double y[], double w[], long int nw, short FlagCentered)
void	Expand_1D (double x[], long int nx, double y[], double w[], long int nw, short FlagCentered)

Detailed Description

Function Documentation

Expand_1D()

void Expand_1D	(	double	x[],
		long int	nx,
		double	y[],
		double	w[],
		long int	nw,
		short	FlagCentered
	)

Expand 1D. Purpose: Basic function to expand a 1D signal

Parameters: In[NxIn] is the input signal (NxIn should be greater than 1) Out[NxIn*2] is the output signal w[nw] is an array that contains the coefficients of the filter

Author: Michael Unser, NIH, BEIP, June 1994 Daniel Sage, EPFL, Biomedical Imaging Group, April 1999

Expand_2D()

int Expand_2D	(	double *	In,
		long int	NxIn,
		long int	NyIn,
		double *	Out,
		double	h[],
		long int	nh,
		short	FlagCentered
	)

Expand 2D. Function: Expand_2D

Purpose: Expands an image by a factor of two in each dimension.

Note: Expects the output array (Out) to be allocated.

Parameters: Input volume: In[NxIn,NyIn] Output voulme: Out[NxIn*2,NyIn*2] Filter coef: h[nh]

Expand_3D()

int Expand_3D	(	double *	In,
		long int	NxIn,
		long int	NyIn,
		long int	NzIn,
		double *	Out,
		double	h[],
		long int	nh,
		short	FlagCentered
	)

Expand 3D. Function: Expand_3D

Purpose: Expands a volume by a factor of two in each dimension.

Note: Expects the output array (Out) to be allocated.

Parameters: Input volume: In[NxIn,NyIn,NzIn] Output voulme: Out[NxIn*2,NyIn*2,NzIn*2] Filter coef: h[nh]

GetPyramidFilter()

int GetPyramidFilter	(	const char *	Filter,
		long int	Order,
		double	g[],
		long int *	ng,
		double	h[],
		long int *	nh,
		short *	FlagCentered
	)

Get Pyramid Filter. Function: GetPyramidFilter

Purpose: Get the coefficients of the filter (reduce and expand filter) Return the coefficients in g[ng] and in h[nh]

Convention: g[ng] for the reduce filter h[nh] for the expansion filter

Parameters: Filter is the name of the filter

Order is the order for the filters based on splines For the "Spline" filter, Order is 0, 1, 2 or 3 For the "Spline L2" filter, Order is 0, 1, 3 or 5 For the "Centered Spline" filter, Order is 0, 1, 2, 3 or 4 For the "Centered Spline L2" filter, Order is 0, 1, 2, 3 or 4

IsCentered is a return value indicates if the filter is a centered filter TRUE if it is a centered filter FALSE if it is not a centered filter

Reduce_1D()

void Reduce_1D	(	double	x[],
		long int	nx,
		double	y[],
		double	w[],
		long int	nw,
		short	FlagCentered
	)

Reduce 1D. Purpose: Basic function to reduce a 1D signal

Parameters: In[NxIn] is the input signal (NxIn should be greater than 2 and even) Out[NxIn/2] is the output signal g[ng] is an array that contains the coefficients of the filter

Author: Michael Unser, NIH, BEIP, June 1994 Daniel Sage, EPFL, Biomedical Imaging Group, April 1999

Reduce_2D()

int Reduce_2D	(	double *	In,
		long int	NxIn,
		long int	NyIn,
		double *	Out,
		double	w[],
		long int	nw,
		short	FlagCentered
	)

Reduce 2D. Function: Reduce_2D

Purpose: Reduces an image by a factor of two in each dimension.

Note: Expects the output array (Out) to be allocated.

Parameters: Input image: In[NxIn*NyIn] Output image: Out[NxIn/2*NyIn/2] Filter: g[ng] coefficients of the filter

Reduce_3D()

int Reduce_3D	(	double *	In,
		long int	NxIn,
		long int	NyIn,
		long int	NzIn,
		double *	Out,
		double	w[],
		long int	nw,
		short	FlagCentered
	)

Reduce 3D. Function: Reduce_3D

Purpose: Reduces a volume by a factor of two in each dimension.

Note: Expects the output array (Out) to be allocated.

Parameters: Input image: In[NxIn*NyIn*NzIn] Output image: Out[NxIn/2*NyIn/2*NzIn/2] Filter: g[ng] coefficients of the filter