Select the best-fitting contour stencils. More...

#include "basic.h"

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Functions
int	FitStencils (int Stencil, int32_t Image, int Width, int Height, int StencilMul)
	Select the best-fitting contour stencils. More...

Detailed Description

Select the best-fitting contour stencils.

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 fitsten.h.

Function Documentation

int FitStencils	(	int *	Stencil,
		int32_t *	Image,
		int	Width,
		int	Height,
		int	StencilMul
	)

Select the best-fitting contour stencils.

Parameters

Stencil	pointer to array of size Width by Height to be filled with the best-fitting stencil for each pixels
Image	the input RGB image
Width,Height	image dimensions
StencilMul	multiply the stencil index by this factor

FitStencils finds the best-fitting stencil at each pixel of the input image

$\mathcal{S}^\star(k) = \arg\min_{\mathcal{S}\in\Sigma} \tfrac{1}{|\mathcal{S}|} (\mathcal{S} \star [v])(k)$

to estimate the local contour orientation. The result Stencil is a two-dimensional array with the index (0, 1, ..., or 7) of the best-fitting stencil for each pixel. The stencil TV estimates $(\mathcal{S} \star [v])(k)$ are filtered by [1,2,1; 2,4,2; 1,2,1]/16 to improve reliability.

For efficiency in CWFirstPass and CWCorrectionPass, the stencil indices are multiplied by StencilMul (so that the index may be used directly as an offset into the samples table).

Definition at line 70 of file fitsten.c.

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Detailed Description

Function Documentation