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`. More...

int	CWInterp (uint32_t Output, const uint32_t Input, int InputWidth, int InputHeight, const int32_t *Psi, cwparams Param)
	Contour stencil windowed interpolation. More...

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. More...

int	DisplayContours (uint32_t Output, int OutputWidth, int OutputHeight, uint32_t Input, int InputWidth, int InputHeight, cwparams Param)
	Display the estimated contour orientations. More...

Detailed Description

Contour stencil windowed interpolation.

Author: Pascal Getreuer getre.nosp@m.uer@.nosp@m.gmail.nosp@m..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 847 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 1270 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 1391 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 319 of file cwinterp.c.

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Data Structures

Functions

Detailed Description

Function Documentation