With
our recent media coverage and the fine work of everyone aggressively exploring the field of Augmented Reality we get a ton of questions about what “Augmented Reality” actually means and why should we care. So here goes…
The definition is tricky because there are a few interstitial technologies out there garnering the lion’s share of attention and purporting to be AR (i.e. Mobile Phone AR). To differentiate slightly, I’ve been calling our work Head Mounted Display Augmented Reality (or HMD-AR).
HMD-AR requires some form of head gear, like glasses (or a SCBA mask) to display computer information over the world you see. It embeds persistent, contextually aware data and command services that are needed and available without the need for a fixed terminal or other interaction system as the arbiter. You never have to look down or away. HMD-AR is always visible, floating in or attached to your world. The data it presents is relevant to you and your surroundings at any given moment, and is the bare-minimum only. Why minimal? Well, our world is cluttered enough, right? If you happen to be working in a life-or-death field, it’s pretty important that you see everything. Besides, the term “augment” means “to improve” right?
To embrace HMD-AR, conventions need to be revised. We must discard the traditional, legacy control systems like QWERTY keyboards, mice, and monitors and re-envision display metaphors like folders, buttons, and pages to become objects that are much more natural and intuitive when placed in our physical environment. It is the enhancement of our environment with cues and controls that are digitally connected. It is about enhancing our performance through the use of connected digital systems.
Here’s an example of a powerful use for HMD-AR. Consider the power of pointing. When you want to tell someone the location of an object, the simplest, most effective, and most intuitive way to do it is to point. Writing an email or verbally describing the location takes longer and introduces all sorts of interpretation errors. HMD-AR allows us to fall back to the common-sense approach to things.

In our first responder work, we developed “point” technology that allows first responders to point at locations, people, etc as a way to communicate interest. When the first responder points at something the system understands the position and direction of the pointing arm as well as the first responder’s physical location and highlights the first physical object that intersects with the “point vector.” This information is instantly conveyed to others’ HMD-AR displays (shown as “point highlights” on the visible world) and even to the site commander on a command map. Pretty useful, right? That’s the (errr…) point.
While the emphasis industry wide has been on visualization approaches, Augmented Reality also includes aural, and haptic modes. Sound and feeling are also key communication systems available to developers as we advance this technology. The secret to the success of HMD-AR; for it to become widely accepted it must be much more than game or entertainment medium (although those will be cool too). It, first and foremost, must be about performance enhancement.