Contour stencil windowed interpolation. More...

#include "basic.h"

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Data Structures
struct	cwparams
	struct of interpolation parameters More...
Functions
int32_t *	PreCWInterp (cwparams Param)
	Precomputations before windowed interpolation `CWInterp`.
int	CWInterp (uint32_t Output, const uint32_t Input, int InputWidth, int InputHeight, const int32_t *Psi, cwparams Param)
	Contour stencil windowed interpolation.
int	CWInterpEx (uint32_t Output, int OutputWidth, int OutputHeight, const uint32_t Input, int InputWidth, int InputHeight, const int32_t *Psi, cwparams Param)
	Contour stencil windowed interpolation for arbitrary scale factors.
int	DisplayContours (uint32_t Output, int OutputWidth, int OutputHeight, uint32_t Input, int InputWidth, int InputHeight, cwparams Param)
	Display the estimated contour orientations.

Detailed Description

Contour stencil windowed interpolation.

Author:: Pascal Getreuer <getreuer@gmail.com>

This program is free software: you can use, modify and/or redistribute it under the terms of the simplified BSD License. You should have received a copy of this license along this program. If not, see <http://www.opensource.org/licenses/bsd-license.html>.

Definition in file cwinterp.h.

Function Documentation

int CWInterp	(	uint32_t *	Output,
		const uint32_t *	Input,
		int	InputWidth,
		int	InputHeight,
		const int32_t *	Psi,
		cwparams	Param
	)

Contour stencil windowed interpolation.

Parameters:

Output	pointer to memory for holding the interpolated image
Input	the input image
InputWidth,InputHeight	input image dimensions
Psi	$\psi$ samples computed by `PreCWInterp`
Param	cwparams struct of interpolation parameters

Definition at line 851 of file cwinterp.c.

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int CWInterpEx	(	uint32_t *	Output,
		int	OutputWidth,
		int	OutputHeight,
		const uint32_t *	Input,
		int	InputWidth,
		int	InputHeight,
		const int32_t *	Psi,
		cwparams	Param
	)

Contour stencil windowed interpolation for arbitrary scale factors.

Parameters:

Output	pointer to memory for holding the interpolated image
OutputWidth,OutputHeight	output image dimensions
Input	the input image
InputWidth,InputHeight	input image dimensions
Psi	$\psi$ samples computed by `PreCWInterp`
Param	cwparams struct of interpolation parameters

Definition at line 1274 of file cwinterp.c.

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int DisplayContours	(	uint32_t *	Output,
		int	OutputWidth,
		int	OutputHeight,
		uint32_t *	Input,
		int	InputWidth,
		int	InputHeight,
		cwparams	Param
	)

Display the estimated contour orientations.

Definition at line 1395 of file cwinterp.c.

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int32_t* PreCWInterp ( cwparams Param )

Precomputations before windowed interpolation CWInterp.

Parameters:

Param cwparams struct of interpolation parameters

Returns:: Pointer to $\psi$ samples array, or null on failure

PreCWInterp precomputes samples of the $\psi$ functions,

$\psi^n_\mathcal{S}(x) = \sum_{m\in\mathcal{N}} (A_\mathcal{S})^{-1}_{m,n} \varphi^m_\mathcal{S}(x - m).$

The routine allocates memory to store the samples and returns a pointer to this memory. It is the responsibility of the caller to call free on this pointer when done to release the memory.

A non-null pointer indicates success. On failure, the returned pointer is null.

Definition at line 323 of file cwinterp.c.

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cwinterp.h File Reference

Data Structures

Functions

Detailed Description

Function Documentation