Class LATCH

LATCH Descriptor.

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.

Note: a complete example can be found under /samples/cpp/tutorial_code/xfeatures2D/latch_match.cpp

Inheritance
System.Object
DisposableObject
DisposableCvObject
Algorithm
Feature2D
LATCH
Implements
Inherited Members
Namespace: OpenCvSharp.XFeatures2D
Assembly: OpenCvSharp.dll
Syntax
public class LATCH : Feature2D, ICvPtrHolder

Methods

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Create(Int32, Boolean, Int32, Double)

Constructor

Declaration
public static LATCH Create(int bytes = 32, bool rotationInvariance = true, int halfSsdSize = 3, double sigma = 2)
Parameters
Type Name Description
System.Int32 bytes

the size of the descriptor - can be 64, 32, 16, 8, 4, 2 or 1
System.Boolean rotationInvariance

whether or not the descriptor should compansate for orientation changes.
System.Int32 halfSsdSize

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.
System.Double 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.
Returns
Type Description
LATCH
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DisposeManaged()

Releases managed resources

Declaration
protected override void DisposeManaged()
Overrides

Implements