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RDistanceLodHeatFlowOp Class Reference

#include <RDistanceLodHeatFlowOp.hpp>

Inheritance diagram for RDistanceLodHeatFlowOp:

[legend]Collaboration diagram for RDistanceLodHeatFlowOp:

[legend]List of all members.

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Detailed Description

Float Heat recursive flow.

Author:

Bernard De Cuyper

Version:

0.05

Date:

1/07/2002

 
Purpose:        Recursieve heat flow have a nice property. The time step is directly related to the sigma of
                the gaussian blurring: t= sigma^2/2.

                Recursieve Heat flow/blurring is very fast but it destroy edges. This can be avoided by predicting
                edges before and ensure edges are maintained. 

                This could be obtained from a modulation of the time step.
                dcritical(edges)= sigma(95%)= 2*sigma
                t(critical heat flow)= (dcritical/2)^2= dcritical^2/8

                A distance map can determine edge distances. 
                
                Fast Computation of Heat recursive flow.
                        Thomas LU model.

                        Semi-Implicit solver using LOD multiplicative splitting
            (I - tau * A) * uNew=  uOld

                        LOD is ok, in isotropic situations

Papers:         "Recursivity and PDE's in image processing", 
                        L. Alvarez, R. Deriche and F Santana, Spain 1998.
                

@ Copyrights: Bernard De Cuyper & Eddy Fraiha 2002, Eggs & Pictures. MIT/Open BSD copyright model.

Public Methods
	RDistanceLodHeatFlowOp (RImage *edgeDistance=0, int iterations=1, double t0=0.0, double tMax=20.0)
	Can be used as alternative of IIR for large sigma blurring when t=(sigma*sigma)/2.
virtual	~RDistanceLodHeatFlowOp ()
void	setEdgeDistance (RImage *distanceMap)
virtual RImage *	filter (RImage *src, RImage *dest=0)
	Local full image filtering.
virtual RImage *	selectedFilter (AnImage *mask, RImage *src, RImage *dest=0)
	Local filtering in a mask area.
virtual void	report (FILE *file)
Protected Methods
virtual double	getTau (int x, int y)
Protected Attributes
int	w
int	h
int	iterMax
double	tmin
double	tmax
ThomasLS *	hThomasLS
ThomasLS *	vThomasLS
RImage *	distanceMapEdges

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Member Function Documentation

RImage * RDistanceLodHeatFlowOp::filter (  RImage *    src, RImage *    dest = 0 )  [virtual]

Local full image filtering. Parameters: src  is RImage* is RImage source channel dest  is RImage* is RImage result/placeholder Returns : RImage* as result, Implements AbsRImageFilter.

RImage * RDistanceLodHeatFlowOp::selectedFilter (  AnImage *    mask, RImage *    src, RImage *    dest = 0 )  [virtual]

Local filtering in a mask area. Parameters: mask  is AnImage* is a ByteImage src  is RImage* is RImage source channel dest  is RImage* is RImage result/placeholder Returns : RImage* as result, Reimplemented from AbsRImageFilter.

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

• RDistanceLodHeatFlowOp.hpp
• RDistanceLodHeatFlowOp.cpp

Restoreinpaint sourceforge project `C++/Java Image Processing, Restoration, Inpainting Project'.

Bernard De Cuyper: Open Project Leader: Concept, design and development. Bernard De Cuyper & Eddy Fraiha 2002, 2003. Bernard De Cuyper 2004. Open and free, for friendly usage only. Modifications on Belgium ground of this piece of artistic work, by governement institutions or companies, must be notified to Bernard De Cuyper.