ImageTracker

A tracker that tracks images in a video. Images are tracked using templates known as reference images.

Properties

state

tracker.state: string, read-only

The current state of the tracker.

database

tracker.database: ReferenceImageDatabase, read-only

A database of reference images.

resolution

tracker.resolution: Resolution

The resolution adopted by the computer vision algorithms implemented in the tracker. Higher resolutions improve the tracking quality, but are computationally more expensive.

Events

An ImageTracker is an AREventTarget. You can listen to the following events:

targetfound

A target has been found.

Properties

referenceImage: ReferenceImage. The reference image that is linked to the target.

Example

tracker.addEventListener('targetfound', event => {
    console.log('Found target: ' + event.referenceImage.name);
});

targetlost

A target has been lost.