org.opencv.features2d

Class BFMatcher

java.lang.Object

org.opencv.core.Algorithm

org.opencv.features2d.DescriptorMatcher

org.opencv.features2d.BFMatcher

public class BFMatcher
extends DescriptorMatcher

Brute-force descriptor matcher. For each descriptor in the first set, this matcher finds the closest descriptor in the second set by trying each one. This descriptor matcher supports masking permissible matches of descriptor sets.

Field Summary

Fields inherited from class org.opencv.features2d.DescriptorMatcher

BRUTEFORCE, BRUTEFORCE_HAMMING, BRUTEFORCE_HAMMINGLUT, BRUTEFORCE_L1, BRUTEFORCE_SL2, FLANNBASED

Constructor Summary

Constructors

Constructor and Description
BFMatcher() Brute-force matcher constructor (obsolete).
BFMatcher(int normType) Brute-force matcher constructor (obsolete).
BFMatcher(int normType, boolean crossCheck) Brute-force matcher constructor (obsolete).

Method Summary

Modifier and Type	Method and Description
static BFMatcher	__fromPtr__(long addr)
static BFMatcher	create() Brute-force matcher create method.
static BFMatcher	create(int normType) Brute-force matcher create method.
static BFMatcher	create(int normType, boolean crossCheck) Brute-force matcher create method.

Methods inherited from class org.opencv.features2d.DescriptorMatcher

add, clear, clone, clone, create, empty, getTrainDescriptors, isMaskSupported, knnMatch, knnMatch, knnMatch, knnMatch, knnMatch, knnMatch, match, match, match, match, radiusMatch, radiusMatch, radiusMatch, radiusMatch, radiusMatch, radiusMatch, read, train, write

Methods inherited from class org.opencv.core.Algorithm

getDefaultName, getNativeObjAddr, save

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

BFMatcher

public BFMatcher()

Brute-force matcher constructor (obsolete). Please use BFMatcher.create()

BFMatcher

public BFMatcher(int normType)

Brute-force matcher constructor (obsolete). Please use BFMatcher.create()

Parameters:

normType - automatically generated

BFMatcher

public BFMatcher(int normType,
                 boolean crossCheck)

Brute-force matcher constructor (obsolete). Please use BFMatcher.create()

Parameters:

normType - automatically generated

crossCheck - automatically generated

Method Detail

__fromPtr__

public static BFMatcher __fromPtr__(long addr)

create

public static BFMatcher create()

Brute-force matcher create method. preferable choices for SIFT and SURF descriptors, NORM_HAMMING should be used with ORB, BRISK and BRIEF, NORM_HAMMING2 should be used with ORB when WTA_K==3 or 4 (see ORB::ORB constructor description). nearest neighbors for each query descriptor. If crossCheck==true, then the knnMatch() method with k=1 will only return pairs (i,j) such that for i-th query descriptor the j-th descriptor in the matcher's collection is the nearest and vice versa, i.e. the BFMatcher will only return consistent pairs. Such technique usually produces best results with minimal number of outliers when there are enough matches. This is alternative to the ratio test, used by D. Lowe in SIFT paper.

Returns:

automatically generated

create

public static BFMatcher create(int normType)

Brute-force matcher create method.

Parameters:

normType - One of NORM_L1, NORM_L2, NORM_HAMMING, NORM_HAMMING2. L1 and L2 norms are preferable choices for SIFT and SURF descriptors, NORM_HAMMING should be used with ORB, BRISK and BRIEF, NORM_HAMMING2 should be used with ORB when WTA_K==3 or 4 (see ORB::ORB constructor description). nearest neighbors for each query descriptor. If crossCheck==true, then the knnMatch() method with k=1 will only return pairs (i,j) such that for i-th query descriptor the j-th descriptor in the matcher's collection is the nearest and vice versa, i.e. the BFMatcher will only return consistent pairs. Such technique usually produces best results with minimal number of outliers when there are enough matches. This is alternative to the ratio test, used by D. Lowe in SIFT paper.

Returns:

automatically generated

create

public static BFMatcher create(int normType,
                               boolean crossCheck)

Brute-force matcher create method.

Parameters:

normType - One of NORM_L1, NORM_L2, NORM_HAMMING, NORM_HAMMING2. L1 and L2 norms are preferable choices for SIFT and SURF descriptors, NORM_HAMMING should be used with ORB, BRISK and BRIEF, NORM_HAMMING2 should be used with ORB when WTA_K==3 or 4 (see ORB::ORB constructor description).

crossCheck - If it is false, this is will be default BFMatcher behaviour when it finds the k nearest neighbors for each query descriptor. If crossCheck==true, then the knnMatch() method with k=1 will only return pairs (i,j) such that for i-th query descriptor the j-th descriptor in the matcher's collection is the nearest and vice versa, i.e. the BFMatcher will only return consistent pairs. Such technique usually produces best results with minimal number of outliers when there are enough matches. This is alternative to the ratio test, used by D. Lowe in SIFT paper.

Returns:

automatically generated