forked from mia/Aegisub
115 lines
3 KiB
C++
115 lines
3 KiB
C++
// This file is part of FexTracker and (C) 2006 by Hajo Krabbenhöft (tentacle)
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// All rights reserved but the aegisub project is allowed to use it.
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// FexImgPyramid.cpp: implementation of the FexImgPyramid class.
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//
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//////////////////////////////////////////////////////////////////////
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#include "StdAfx.h"
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#include "FexImgPyramid.h"
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#include "FexGenericFilter_Include.h"
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void BaseFloatImage_GaussEdgeDetect( float* Img, int sizx, int sizy, float sigma, float* GradX, float* GradY );
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void BaseFloatImage_GaussSmooth( float* Img, int sizx, int sizy, float sigma, float* Out );
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void BaseFloatImage_LanczosRescale( float* in, int inSx, int inSy, float* out, int outSx, int outSy );
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#ifndef MIN
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#define MIN(a,b) ((a)<(b))?(a):(b)
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#endif
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//////////////////////////////////////////////////////////////////////
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// Construction/Destruction
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//////////////////////////////////////////////////////////////////////
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//turn off image debugging
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#ifndef imdebug
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#define imdebug //
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#endif
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FexImgPyramidLevel::FexImgPyramidLevel( int isx, int isy )
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{
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sx = isx;
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sy = isy;
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Img = new float[ sx*sy ];
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GradX = new float[ sx*sy ];
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GradY = new float[ sx*sy ];
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}
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FexImgPyramidLevel::~FexImgPyramidLevel()
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{
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delete [] Img;
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delete [] GradX;
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delete [] GradY;
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}
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void FexImgPyramidLevel::Fill( float* iImg, float DetectSmoothSigma )
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{
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imdebug("lum b=32f w=%d h=%d %p /255", sx, sy, iImg);
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BaseFloatImage_GaussSmooth( iImg, sx, sy, DetectSmoothSigma, Img );
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imdebug("lum b=32f w=%d h=%d %p /255", sx, sy, Img);
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}
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void FexImgPyramidLevel::Scale( FexImgPyramidLevel* old )
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{
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imdebug("lum b=32f w=%d h=%d %p /255", old->sx, old->sy, old->Img);
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BaseFloatImage_LanczosRescale( old->Img, old->sx, old->sy, Img, sx, sy );
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imdebug("lum b=32f w=%d h=%d %p /255", sx, sy, Img);
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}
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void FexImgPyramidLevel::Calc( float EdgeDetectSigma )
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{
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imdebug("lum b=32f w=%d h=%d %p /255", sx, sy, Img);
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BaseFloatImage_GaussEdgeDetect( Img, sx, sy, EdgeDetectSigma, GradX, GradY );
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imdebug("lum b=32f w=%d h=%d %p /2", sx, sy, GradX);
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imdebug("lum b=32f w=%d h=%d %p /2", sx, sy, GradY);
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}
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FexImgPyramid::FexImgPyramid( float* Img, int SizX, int SizY, float EdgeDetectSigma, float DetectSmoothSigma, int iSubsampling, int Levels )
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{
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int i;
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Subsampling = iSubsampling;
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if( Levels == -1 ) Levels = 999;
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int mLvl = 0;
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int tsm = MIN(SizX,SizY);
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while( tsm>1 && tsm%2==0 )
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{
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tsm/=Subsampling;
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++mLvl;
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}
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if( Levels > mLvl ) Levels = mLvl;
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if( Levels < 1 ) Levels = 1;
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nLevels = Levels;
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lLevels = new FexImgPyramidLevel*[ nLevels ];
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lLevels[0] = new FexImgPyramidLevel( SizX, SizY );
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lLevels[0]->Fill( Img, DetectSmoothSigma );
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for( i=1;i<nLevels;i++ )
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{
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SizX /= Subsampling;
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SizY /= Subsampling;
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lLevels[i] = new FexImgPyramidLevel( SizX, SizY );
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lLevels[i]->Scale( lLevels[i-1] );
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}
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float cmul = 1.f;
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for( i=0;i<nLevels;i++ )
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{
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lLevels[i]->CoordMul = cmul;
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lLevels[i]->Calc( EdgeDetectSigma );
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cmul /= Subsampling;
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}
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}
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FexImgPyramid::~FexImgPyramid()
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{
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for( int i=0;i<nLevels;i++ )
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delete lLevels[i];
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delete [] lLevels;
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}
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