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FDistanceLodHeatFlowOp Class Reference

#include <FDistanceLodHeatFlowOp.hpp>

Inheritance diagram for FDistanceLodHeatFlowOp:

[legend]Collaboration diagram for FDistanceLodHeatFlowOp:

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

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Member Function Documentation

FImage * FDistanceLodHeatFlowOp::filter (  FImage *    src, FImage *    dest = 0 )  [virtual]

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

FImage * FDistanceLodHeatFlowOp::selectedFilter (  AnImage *    mask, FImage *    src, FImage *    dest = 0 )  [virtual]

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

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

• FDistanceLodHeatFlowOp.hpp
• FDistanceLodHeatFlowOp.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.