xfeatures2d_LATCH
import { xfeatures2d_LATCH } from '@banou/opencv-wasm'Use after await initOpenCV(). See the initialization and named imports guide.
Native object: release it with using or delete(). Factories can return null; check before calling methods. Inherits xfeatures2d_Feature2D.
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
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
Constructors and members
static create
Create an owned xfeatures2d_LATCH instance with the supplied configuration.
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
create(bytes: number, rotationInvariance: boolean, half_ssd_size: number, sigma: number): xfeatures2d_LATCH | null;5 available overloads
create(): xfeatures2d_LATCH | null;create(bytes: number): xfeatures2d_LATCH | null;create(bytes: number, rotationInvariance: boolean): xfeatures2d_LATCH | null;create(bytes: number, rotationInvariance: boolean, half_ssd_size: number): xfeatures2d_LATCH | null;create(bytes: number, rotationInvariance: boolean, half_ssd_size: number, sigma: number): xfeatures2d_LATCH | null;bytesbytes argument (number).
rotationInvariancerotation invariance argument (boolean).
half_ssd_sizehalf ssd size argument (number).
sigmasigma argument (number).
The xfeatures2d_LATCH | null result.
clone
Create another handle to the same native object. This retains the object without copying its pixels or algorithm state; dispose both handles separately.
clone(): this;The this result.
setBytes
Set the bytes used by this xfeatures2d_LATCH object.
setBytes(bytes: number): void;bytesbytes argument (number).
getBytes
Return the bytes configured on this xfeatures2d_LATCH object.
getBytes(): number;The number result.
setRotationInvariance
Set the rotation invariance used by this xfeatures2d_LATCH object.
setRotationInvariance(rotationInvariance: boolean): void;rotationInvariancerotation invariance argument (boolean).
getRotationInvariance
Return the rotation invariance configured on this xfeatures2d_LATCH object.
getRotationInvariance(): boolean;The boolean result.
setHalfSSDsize
Set the half ssdsize used by this xfeatures2d_LATCH object.
setHalfSSDsize(half_ssd_size: number): void;half_ssd_sizehalf ssd size argument (number).
getHalfSSDsize
Return the half ssdsize configured on this xfeatures2d_LATCH object.
getHalfSSDsize(): number;The number result.
setSigma
Set the sigma used by this xfeatures2d_LATCH object.
setSigma(sigma: number): void;sigmasigma argument (number).
getSigma
Return the sigma configured on this xfeatures2d_LATCH object.
getSigma(): number;The number result.
getDefaultName
Return the default name configured on this xfeatures2d_LATCH object.
getDefaultName(): string;The string result.
These signatures describe this package. Upstream documentation can mention optional backends that are absent from this build. Check runtime compatibility before choosing a backend or file format.