Package org.opencv.xfeatures2d

Class LATCH

java.lang.Object

org.opencv.core.Algorithm

org.opencv.features.Feature2D

org.opencv.xfeatures2d.LATCH

public class LATCH
extends Feature2D

latch Class for computing the LATCH descriptor. If you find this code useful, please add a reference to the following paper in your work: Gil Levi and Tal Hassner, "LATCH: Learned Arrangements of Three Patch Codes", arXiv preprint arXiv:1501.03719, 15 Jan. 2015 LATCH is a binary descriptor based on learned comparisons of triplets of image patches. bytes is the size of the descriptor - can be 64, 32, 16, 8, 4, 2 or 1 rotationInvariance - whether or not the descriptor should compansate for orientation changes. half_ssd_size - the size of half of the mini-patches size. For example, if we would like to compare triplets of patches of size 7x7x then the half_ssd_size should be (7-1)/2 = 3. sigma - sigma value for GaussianBlur smoothing of the source image. Source image will be used without smoothing in case sigma value is 0. Note: the descriptor can be coupled with any keypoint extractor. The only demand is that if you use set rotationInvariance = True then you will have to use an extractor which estimates the patch orientation (in degrees). Examples for such extractors are ORB and SIFT. Note: a complete example can be found under /samples/cpp/tutorial_code/xfeatures2D/latch_match.cpp

Field Summary

Fields inherited from class org.opencv.core.Algorithm

nativeObj

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	LATCH(long addr)

Method Summary

Modifier and Type	Method	Description
static LATCH	__fromPtr__(long addr)
static LATCH	create()
static LATCH	create(int bytes)
static LATCH	create(int bytes, boolean rotationInvariance)
static LATCH	create(int bytes, boolean rotationInvariance, int half_ssd_size)
static LATCH	create(int bytes, boolean rotationInvariance, int half_ssd_size, double sigma)
protected void	finalize()
int	getBytes()
java.lang.String	getDefaultName()	Returns the algorithm string identifier.
int	getHalfSSDsize()
boolean	getRotationInvariance()
double	getSigma()
void	setBytes(int bytes)
void	setHalfSSDsize(int half_ssd_size)
void	setRotationInvariance(boolean rotationInvariance)
void	setSigma(double sigma)

Methods inherited from class org.opencv.features.Feature2D

compute, compute, defaultNorm, descriptorSize, descriptorType, detect, detect, detect, detect, detectAndCompute, detectAndCompute, empty, read, write

Methods inherited from class org.opencv.core.Algorithm

clear, getNativeObjAddr, save

Methods inherited from class java.lang.Object

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

Constructor Detail

LATCH

protected LATCH(long addr)

Method Detail

__fromPtr__

public static LATCH __fromPtr__(long addr)

create

public static LATCH create(int bytes,
                           boolean rotationInvariance,
                           int half_ssd_size,
                           double sigma)

create

public static LATCH create(int bytes,
                           boolean rotationInvariance,
                           int half_ssd_size)

create

public static LATCH create(int bytes,
                           boolean rotationInvariance)

create

public static LATCH create(int bytes)

create

public static LATCH create()

setBytes

public void setBytes(int bytes)

getBytes

public int getBytes()

setRotationInvariance

public void setRotationInvariance(boolean rotationInvariance)

getRotationInvariance

public boolean getRotationInvariance()

setHalfSSDsize

public void setHalfSSDsize(int half_ssd_size)

getHalfSSDsize

public int getHalfSSDsize()

setSigma

public void setSigma(double sigma)

getSigma

public double getSigma()

getDefaultName

public java.lang.String getDefaultName()

Description copied from class: Algorithm

Returns the algorithm string identifier. This string is used as top level xml/yml node tag when the object is saved to a file or string.

Overrides:

getDefaultName in class Feature2D

Returns:

automatically generated

finalize

protected void finalize()
                 throws java.lang.Throwable

Overrides:

finalize in class Feature2D

Throws:

java.lang.Throwable