Augmented Reality for Android Application Development电子书

Augmented Reality for Android Application Development

Table of Contents

Augmented Reality for Android Application Development

Credits

About the Authors

About the Reviewers

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Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example code

Errata

Piracy

Questions

1. Augmented Reality Concepts and Tools

A quick overview of AR concepts

Sensory augmentation

Displays

Registration in 3D

Interaction with the environment

Choose your style – sensor-based and computer vision-based AR

Sensor-based AR

Computer vision-based AR

AR architecture concepts

AR software components

AR control flow

System requirements for development and deployment

Installing the Android Developer Tools Bundle and the Android NDK

Installing JMonkeyEngine

Installing VuforiaTM

Which Android devices should you use?

Summary

2. Viewing the World

Understanding the camera

Camera characteristics

Camera versus screen characteristics

Accessing the camera in Android

Creating an Eclipse project

Permissions in the Android manifest

Creating an activity that displays the camera

Setting camera parameters

Creating SurfaceView

Live camera view in JME

Creating the JME activity

Creating the JME application

Summary

3. Superimposing the World

The building blocks of 3D rendering

Real camera and virtual camera

Camera parameters (intrinsic orientation)

Using the scenegraph to overlay a 3D model onto the camera view

Improving the overlay

Summary

4. Locating in the World

Knowing where you are – handling GPS

GPS and GNSS

JME and GPS – tracking the location of your device

Knowing where you look – handling inertial sensors

Understanding sensors

Sensors in JME

Improving orientation tracking – handling sensor fusion

Sensor fusion in a nutshell

Sensor fusion in JME

Getting content for your AR browser – the Google Places API

Querying for POIs around your current location

Parsing the Google Places APIs results

Summary

5. Same as Hollywood – Virtual on Physical Objects

Introduction to computer vision-based tracking and VuforiaTM

Choosing physical objects

Understanding frame markers

Understanding natural feature tracking targets

VuforiaTM architecture

Configuring VuforiaTM to recognize objects

Putting it together – VuforiaTM with JME

The C++ integration

The Java integration

Summary

6. Make It Interactive – Create the User Experience

Pick the stick – 3D selection using ray picking

Proximity-based interaction

Simple gesture recognition using accelerometers

Summary

7. Further Reading and Tips

Managing your content

Multi-targets

Cloud recognition

Improving recognition and tracking

Advanced interaction techniques

Summary

Index