是否可以使用 AR.js 在网络上进行增强现实扩展跟踪?

Is it possible to do Augmented Reality extended tracking on web using AR.js?

我正在从事基于 THREE.js 和 AR.js 的基于网络的增强现实项目。

我面临的问题是,当 "marker" 离开我的相机时,增强现实图像会消失或卡在屏幕的一侧。

Vuforia 2.8 版本已经解决了这个问题。 Vuforia SDK 2.8: Now with Extended Tracking

对于使用 AR.js 的网络增强现实是否存在类似的解决方案?

抱歉,这不可能。有人在 AR.js 的 GitHub 跟踪器上问了几乎相同的问题:

Honestly, if you want to be able to have AR content without marker images constantly present within view of the camera, there's really only one alternative: SLAM-based AR. e.g. ARKit or ARCore (formerly Tango). These API's are not available for browser, but if you're interested in WebAR without markers, look into:
https://github.com/google-ar/WebARonARCore
https://github.com/google-ar/WebARonARKit
Otherwise, this is your best option if you can handle having markers in view of the camera 100% of the time (if that's what you're asking about). p.s. I've not tried AR.js w/ multi-marker images yet (I've since moved away from it in favor of the above).