AR’s technical constraints: size, power, heat

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來自 Google AR & VR 的課程

Introduction to Augmented Reality and ARCore

568 個評分

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Google AR & VR

Introduction to Augmented Reality and ARCore

568 個評分

This class will teach you the fundamentals of augmented reality (AR), and how to build an AR experience using ARCore. Through the four week course, you'll learn: - How to identify different types of AR experiences - Tools and platforms used in the AR landscape - What makes AR feel "real" - Popular use cases for AR - How to create an AR use flow - How AR experiences work - Tools like Google Poly and Unity to build AR experiences - Next steps to start building an AR experience using ARCore and other tools This course will break down complex AR concepts to make them easy to understand, while also sharing expert tips and knowledge from Daydream's ARCore team. The course is great for beginners who are just getting started with AR or ARCore.

從本節課中

The basics of AR functionality

In this module we’ll dive into the hardware components inside mobile devices that power augmented reality, and you'll discover ways in which AR assets can feel real and keep users immersed. You'll learn about ARCore features that help make a digital object behave as though it exists in a real world space, as well as a few constraints facing AR today.

Interface issues and lack of UI metaphors1:44

AR’s technical constraints: size, power, heat2:06

The 3D barrier0:56

Computer vision limitations1:07

Constraints of occlusion and shading0:43

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Google AR & VR

The details of what makes AR challenging from a technical standpoint are complex.

But they can be boiled down to three simple words;

size, power, and heat.

We've come a long way when it comes to miniaturized processors and graphics cards,

but we're still not quite at the level we need to be to make

high-end everyday AR a, well, reality.

Processors get heavy quickly when worn on your face.

Some AR prototypers think that the answer is

an external computing pack about the size of an external hard drive.

These packs would do all the actual heavy lifting for

the AR processes and allow for lighter and more ergonomic frames.

Rendering an AR experience takes a lot of power.

Think about how much your cell phone battery drains when you're streaming video.

Now imagine if it wasn't merely streaming images

but generating those images and doing so while also

tracking every other object in a room and

recalibrating the image every time your head so much as twitches.

Again, something the solution is to

have an external battery pack that clips to your belt.

That might work for now, but ultimately,

the power problem is one we're going to have to overcome within

the frame of the device if we want AR to reach its full potential.

You've probably noticed that every PC or laptop you've ever owned as a fan inside.

Computing generates heat, a lot of it.

In fact, the more power used,

the more heat that gets generated,

and the smaller the device,

the slower it gets rid of that heat.

AR is a highly complex process,

and therefore generates a lot of heat.

That heat in turn can slow down processors or even short them out altogether.

Managing this heat is even harder with

the limited size and structural requirements of an AR headset.

There isn't much room for heat sinks and fans in a device that's supposed to

eventually weigh a few ounces and look like an ordinary pair of glasses.

Some AR headset manufacturers are packing all of

the processing power into the frames of the visor itself.

Meanwhile, other manufacturers are using

external hardware like battery packs to address the issue.

Each comes with its sets of pros and cons.

There two takes on how to strike the balance between the issues of size, heat, and power.

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