Tracker

Motion and trackingclassOpenCV 5.0.0

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

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

ARGUMENTSConstructor or factory

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CLASSTracker

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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.

Base abstract class for the long-term tracker

Upstream declaration ↗

Constructors and members

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.

getTrackingScore

Return tracking score

getTrackingScore(): number;

Returns

The number result.

Upstream declaration ↗

init

Initialize the tracker with a known bounding box that surrounded the target

init(image: Mat, boundingBox: Rect): void;

image

The initial frame

boundingBox

The initial bounding box

Upstream declaration ↗

update

Update the tracker, find the new most likely bounding box for the target

update(image: Mat): [boolean, Rect];

image

The current frame

Returns

True means that target was located and false means that tracker cannot locate target in current frame. Note, that latter does not imply that tracker has failed, maybe target is indeed missing from the frame (say, out of sight)

Upstream declaration ↗

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.