xfeatures2d_PCTSignaturesSQFD

xfeatures2dclassOpenCV 5.0.0

import { xfeatures2d_PCTSignaturesSQFD } from '@banou/opencv-wasm'

Use after await initOpenCV(). See the initialization and named imports guide.

ARGUMENTSConstructor or factory

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CLASSxfeatures2d_PCTSignaturesSQFD

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RETURN TYPEOwned native handle

Call structure. A void return can still write to destination arguments. The parameter descriptions define inputs, outputs and ownership.

Native object: release it with using or delete(). Factories can return null; check before calling methods. Inherits Algorithm.

Class implementing Signature Quadratic Form Distance (SQFD). See: Christian Beecks, Merih Seran Uysal, Thomas Seidl. Signature quadratic form distance. In Proceedings of the ACM International Conference on Image and Video Retrieval, pages 438-445. ACM, 2010. [BeecksUS10]

Upstream declaration ↗

Constructors and members

static create

Creates the algorithm instance using selected distance function, similarity function and similarity function parameter.

create(distanceFunction: number, similarityFunction: number, similarityParameter: number): xfeatures2d_PCTSignaturesSQFD | null;

4 available overloads

create(): xfeatures2d_PCTSignaturesSQFD | null;

create(distanceFunction: number): xfeatures2d_PCTSignaturesSQFD | null;

create(distanceFunction: number, similarityFunction: number): xfeatures2d_PCTSignaturesSQFD | null;

create(distanceFunction: number, similarityFunction: number, similarityParameter: number): xfeatures2d_PCTSignaturesSQFD | null;

distanceFunction

Distance function selector. Default: L2 Available: L0_25, L0_5, L1, L2, L2SQUARED, L5, L_INFINITY

similarityFunction

Similarity function selector. Default: HEURISTIC Available: MINUS, GAUSSIAN, HEURISTIC

similarityParameter

Parameter of the similarity function.

Returns

The xfeatures2d_PCTSignaturesSQFD | null result.

Upstream declaration ↗

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;

Returns

The this result.

computeQuadraticFormDistance

Computes Signature Quadratic Form Distance of two signatures.

computeQuadraticFormDistance(_signature0: Mat, _signature1: Mat): number;

_signature0

The first signature.

_signature1

The second signature.

Returns

The number result.

Upstream declaration ↗

computeQuadraticFormDistances

Computes Signature Quadratic Form Distance between the reference signature and each of the other image signatures.

computeQuadraticFormDistances(sourceSignature: Mat, imageSignatures: MatVector, distances: FloatVector): void;

sourceSignature

The signature to measure distance of other signatures from.

imageSignatures

Vector of signatures to measure distance from the source signature.

distances

Output vector of measured distances.

Upstream declaration ↗

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