org.bytedeco.opencv.opencv_xfeatures2d

Class LATCH

java.lang.Object

org.bytedeco.javacpp.Pointer

org.bytedeco.opencv.opencv_core.Algorithm

org.bytedeco.opencv.opencv_features2d.Feature2D

org.bytedeco.opencv.opencv_xfeatures2d.LATCH

All Implemented Interfaces:

AutoCloseable

@Namespace(value="cv::xfeatures2d")
 @Properties(inherit=opencv_xfeatures2d.class)
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

Nested Class Summary

Nested classes/interfaces inherited from class org.bytedeco.javacpp.Pointer

Pointer.CustomDeallocator, Pointer.Deallocator, Pointer.NativeDeallocator, Pointer.ReferenceCounter

Field Summary

Fields inherited from class org.bytedeco.javacpp.Pointer

address, capacity, limit, position

Constructor Summary

Constructors

Constructor and Description
LATCH() Default native constructor.
LATCH(long size) Native array allocator.
LATCH(Pointer p) Pointer cast constructor.

Method Summary

Modifier and Type	Method and Description
static LATCH	create()
static LATCH	create(int bytes, boolean rotationInvariance, int half_ssd_size, double sigma)
LATCH	position(long position)

Methods inherited from class org.bytedeco.opencv.opencv_features2d.Feature2D

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

Methods inherited from class org.bytedeco.opencv.opencv_core.Algorithm

clear, save, save

Methods inherited from class org.bytedeco.javacpp.Pointer

address, asBuffer, asByteBuffer, availablePhysicalBytes, calloc, capacity, capacity, close, deallocate, deallocate, deallocateReferences, deallocator, deallocator, equals, fill, formatBytes, free, hashCode, isNull, isNull, limit, limit, malloc, maxBytes, maxPhysicalBytes, memchr, memcmp, memcpy, memmove, memset, offsetof, parseBytes, physicalBytes, position, put, realloc, referenceCount, releaseReference, retainReference, setNull, sizeof, toString, totalBytes, totalPhysicalBytes, withDeallocator, zero

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

LATCH

public LATCH()

Default native constructor.

LATCH

public LATCH(long size)

Native array allocator. Access with Pointer.position(long).

LATCH

public LATCH(Pointer p)

Pointer cast constructor. Invokes Pointer.Pointer(Pointer).

Method Detail

position

public LATCH position(long position)

Overrides:

position in class Feature2D

create

@opencv_core.Ptr
public static LATCH create(int bytes,
                                            @Cast(value="bool")
                                            boolean rotationInvariance,
                                            int half_ssd_size,
                                            double sigma)

create

@opencv_core.Ptr
public static LATCH create()