//?KeyPoint.cpp:?implementation?of?the?CKeyPoint?class.
//
//////////////////////////////////////////////////////////////////////

#include?“stdafx.h“
#include?“TestSIFT.h“
#include?“KeyPoint.h“

#ifdef?_DEBUG
#undef?THIS_FILE
static?char?THIS_FILE[]=__FILE__;
#define?new?DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
//?Construction/Destruction
//////////////////////////////////////////////////////////////////////

CKeyPoint::	CKeyPoint?（IplImage*?gaussImg?double?x?double?y?double?imgScale
		double?kpScale?double?orientation）
{
	m_gaussImg?=?gaussImg;
	m_x?=?x;
	m_y?=?y;
	m_imgScale?=?imgScale;
	m_kpScale?=?kpScale;
	m_orientation?=?orientation;
	m_featureVec?=?NULL;
}

CKeyPoint::~CKeyPoint（）
{
	if?（m_featureVec?!=?NULL）
		delete?m_featureVec;
}

void?CKeyPoint::CreateVector?（int?xDim?int?yDim?int?oDim）
{
	m_xDim?=?xDim;
	m_yDim?=?yDim;
	m_oDim?=?oDim;
	m_featureVec?=?new?double[yDim?*?xDim?*?oDim];
	memset?（m_featureVec0sizeof（double）*yDim*xDim*oDim）;
}


void?CKeyPoint::FVSet（int?xI?int?yI?int?oI?double?value）
{
	//?row?major
	m_featureVec[（yI?*?m_xDim?*?m_oDim）?+?（xI?*?m_oDim）?+?oI]?=?value;
}

double?CKeyPoint::FVGet（int?xI?int?yI?int?oI）
{
	//?row?major
	return?m_featureVec[（yI?*?m_xDim?*?m_oDim）?+?（xI?*?m_oDim）?+?oI];
}

//?Threshhold?and?normalize?feature?vector.
//?Note?that?the?feature?vector?as?a?whole?is?normalized?（Lowe‘s?paper?is
//?a?bit?unclear?at?that?point）.
void?CKeyPoint::CapAndNormalizeFV?（double?fvGradHicap）
{
	//?Straight?normalization
	int?len?=?m_xDim?*?m_yDim?*?m_oDim;
	double?norm?=?0.0;
	for?（int?i?=?0?;?i?		norm?+=?m_featureVec[i]*m_featureVec[i];

	norm?=?sqrt?（norm）;
	if?（norm?==?0.0）
		return;

	for?（i?=?0?;?i?		m_featureVec[i]?/=?norm;

	//?Hicap?after?normalization
	for?（i?=?0?;?i?		if?（m_featureVec[i]?>?fvGradHicap）?
			m_featureVec[i]?=?fvGradHicap;

	//?Renormalize?again
	norm?=?0;
	for?（i?=?0?;?i?		norm?+=?m_featureVec[i]*m_featureVec[i];
	norm?=?sqrt?（norm）;
	
	for?（i?=?0?;?i?		m_featureVec[i]?/=?norm;
}

?屬性????????????大小?????日期????時(shí)間???名稱(chēng)
-----------?---------??----------?-----??----
?????目錄???????????0??2015-06-17?22:50??OPENCV_SIFT_特征提取_匹配算法\
?????文件????????2187??2006-04-24?05:57??OPENCV_SIFT_特征提取_匹配算法\KeyPoint.cpp
?????文件????????1171??2006-04-24?05:01??OPENCV_SIFT_特征提取_匹配算法\KeyPoint.h
?????文件?????????598??2006-04-24?17:15??OPENCV_SIFT_特征提取_匹配算法\MatchInfo.cpp
?????文件?????????565??2006-04-24?17:14??OPENCV_SIFT_特征提取_匹配算法\MatchInfo.h
?????文件????????1810??2006-04-24?17:28??OPENCV_SIFT_特征提取_匹配算法\MinHeap.cpp
?????文件?????????750??2006-04-24?16:58??OPENCV_SIFT_特征提取_匹配算法\MinHeap.h
?????文件????????3615??2006-04-04?16:20??OPENCV_SIFT_特征提取_匹配算法\ReadMe.txt
?????文件????????2276??2006-04-25?22:20??OPENCV_SIFT_特征提取_匹配算法\SIFT.cpp
?????文件????????1693??2006-04-25?22:08??OPENCV_SIFT_特征提取_匹配算法\SIFT.h
?????文件???????30737??2006-04-25?21:53??OPENCV_SIFT_特征提取_匹配算法\ScaleSpace.cpp
?????文件????????2354??2006-04-25?21:53??OPENCV_SIFT_特征提取_匹配算法\ScaleSpace.h
?????文件?????????210??2006-04-04?16:20??OPENCV_SIFT_特征提取_匹配算法\StdAfx.cpp
?????文件?????????999??2006-04-04?16:20??OPENCV_SIFT_特征提取_匹配算法\StdAfx.h
?????文件???????20992??2007-12-18?16:21??OPENCV_SIFT_特征提取_匹配算法\TestSIFT.aps
?????文件????????1820??2007-12-18?16:38??OPENCV_SIFT_特征提取_匹配算法\TestSIFT.clw
?????文件????????2058??2006-04-04?16:20??OPENCV_SIFT_特征提取_匹配算法\TestSIFT.cpp
?????文件????????4900??2006-04-24?17:56??OPENCV_SIFT_特征提取_匹配算法\TestSIFT.dsp
?????文件????????1439??2006-04-22?03:50??OPENCV_SIFT_特征提取_匹配算法\TestSIFT.dsw
?????文件????????1346??2006-04-04?16:20??OPENCV_SIFT_特征提取_匹配算法\TestSIFT.h
?????文件?????1139712??2007-12-18?16:52??OPENCV_SIFT_特征提取_匹配算法\TestSIFT.ncb
?????文件???????79360??2007-12-18?16:52??OPENCV_SIFT_特征提取_匹配算法\TestSIFT.opt
?????文件????????1120??2007-12-18?16:22??OPENCV_SIFT_特征提取_匹配算法\TestSIFT.plg
?????文件????????5452??2006-04-24?23:51??OPENCV_SIFT_特征提取_匹配算法\TestSIFT.rc
?????文件???????10820??2006-04-29?05:20??OPENCV_SIFT_特征提取_匹配算法\TestSIFTDlg.cpp
?????文件????????1573??2006-04-25?00:00??OPENCV_SIFT_特征提取_匹配算法\TestSIFTDlg.h
?????目錄???????????0??2015-06-17?22:50??OPENCV_SIFT_特征提取_匹配算法\res\
?????文件????????1078??2006-04-04?16:20??OPENCV_SIFT_特征提取_匹配算法\res\TestSIFT.ico
?????文件?????????400??2006-04-04?16:20??OPENCV_SIFT_特征提取_匹配算法\res\TestSIFT.rc2
?????文件????????3072??2007-12-18?13:04??OPENCV_SIFT_特征提取_匹配算法\res\Thumbs.db
?????文件?????????824??2006-04-24?23:51??OPENCV_SIFT_特征提取_匹配算法\resource.h
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