3. Design and evaluation of the AR-QAS
In this section, the architecture of the AR-QAS is presented.
Experimental results that evaluate the question classification accuracy
of AR-QAS are then revealed. Finally, a case study is provided
to evaluate a user’s experience with the AR-QAS.
3.1. Design of AR-QAS
AR-QAS, which incorporates mobile cloud computing techniques,
includes mobile phones and a cloud server (shown in
Fig. 1). Details on the functions of AR-QAS are presented in the following
sections.
3.1.1. Mobile phones
Mobile phones offer AR, voice interaction, and a web service client.
When the user uses the AR-QAS to read an advertising flyer,
the mobile phone can present a 3D object that speaks (e.g., a narrator)
based on an AR technique. The user can touch the narrator
on the screen and pose a question. The narrator can then answer