ldvSift.h File Reference

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Detailed Description

Several function to organize and compare SIFT features.

Author:

Copyright (C) 2007 Vincent Rabaud <vrabaud@cs.ucsd.edu>

Version:

1.5-20081001

#include <vector>

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Defines
#define	LDV_SIFT_INTVLS   SIFT_INTVLS
	default number of sampled intervals per octave.
Functions
bool	computeAllSIFT (vector< ImgInfo > &vImgInfo)
	Computes the SIFT features of a certain images.
void	compareAllSIFT (vector< ImgInfo > &vImgInfo, Match &match, bool doOrphan)
	Compare the SIFT features of an image to all the previously computed ones.
void	reclaimFeature (vector< ImgInfo > &vImgInfo, AllFeatureGlobal &allFeatureGlobal, Match &match)
	Reassociates some features for matching.
Variables
float	LDV_SIFT_CONTR_THR
	default threshold on keypoint contrast |D(x)|.
const int	KDTREE_BBF_MAX_NN_CHKS = 3 * 128
	the maximum number of keypoint NN candidates to check during BBF search
const double	NN_SQ_DIST_RATIO_THR = 0.49
	threshold on squared ratio of distances between NN and 2nd NN

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Define Documentation

#define LDV_SIFT_INTVLS   SIFT_INTVLS

default number of sampled intervals per octave.

3 Originally

Referenced by computeAllSIFT().

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Function Documentation

bool computeAllSIFT

(

vector< ImgInfo > &

vImgInfo

)

Computes the SIFT features of a certain images.

Parameters:

vImgInfo

vector of Infos of the images to analyze.

Returns:

true if all the image files were found

References LDV_SIFT_CONTR_THR, LDV_SIFT_INTVLS, and SIFT_RANSAC_THRES.

void compareAllSIFT	(	vector< ImgInfo > &	vImgInfo,
		Match &	match,
		bool	doOrphan
	)

Compare the SIFT features of an image to all the previously computed ones.

Parameters:

	vImgInfo	Vector containing the info of all the images analyzed so far.
	match	contains all the information concerning matches
	doOrphan	if true, try to match orphans too

References feature2::addMatch(), computeOverlap(), Match::getComparedSIFT(), getFeatInd(), Match::getNMatch(), Match::increaseMatch(), Match::initializeMatch(), KDTREE_BBF_MAX_NN_CHKS, NN_SQ_DIST_RATIO_THR, and Match::setComparedSIFT().

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void reclaimFeature	(	vector< ImgInfo > &	vImgInfo,
		AllFeatureGlobal &	allFeatureGlobal,
		Match &	match
	)

Reassociates some features for matching.

Parameters:

	vImgInfo	vector containing information about the images
	allFeatureGlobal	all the FeatureGlobal
	match	contains all the information concerning matches

References AllFeatureGlobal::distSq(), Match::getNReclaimed(), Match::increaseNReclaimed(), Match::initializeNReclaimed(), AllFeatureGlobal::merge(), and SIFT_RANSAC_THRES.

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Variable Documentation

float LDV_SIFT_CONTR_THR

default threshold on keypoint contrast |D(x)|.

0.04 Originally

Referenced by computeAllSIFT().