Lecture 7

Question 1

What are the 4 terms on the reality virtuality continuum?

Answer 1

Real environment, augmented reality, augmented virtuality, virtual environment.

Question 2

What is Azuma’s definition of augmented reality? What is needed for these?

Answer 2

Combines real and virtual objects in a real environment(needs displays and visual coherence), runs interactively and in real time(needs interaction devices and computational power), registers (aligns) real and virtual objects with each other(needs robust tracking).

Question 3

What is spatial augmented reality?

Answer 3

Augmented reality using large spatially-aligned optical elements(e.g projectors acting on a room), the display is seperated from the users of the system.

Question 4

What is Video See-through augmented reality?

Answer 4

The real world is captured with a video camera, digital information is then overlaid and displayed on the integrated screen. The display is not seperated from the user, being either hand held or head mounted.

Question 5

What is optical see-through augmented reality?

Answer 5

Real and virtual is combined using an optical combiner or contact lens(not yet), always worn on the head.

Question 6

What are some of the challenges of augmented reality?

Answer 6

There are technological limitations such as needing better accuracy(sensors, tracking algorithms), displays, weight, and power consumption, but also social acceptance, privacy concerns, availability of content and applications.