Augmented Reality : A Practical Guide

by Cawood, Stephen

• ISBN13: 9781934356036
• ISBN10: 1934356034
• Format: Paperback
• Copyright: 2008-01-01
• Publisher: Oreilly & Associates Inc

Summary

Augmented Reality is the fusion of real and virtual reality, where computer graphics objects are blended into real footage in real-time. AR creates the illusion that virtual, computer-generated objects exist in the real world. All you need is a computer and a webcam. This book will show you how, and teach you about game development at the same time. You can run the included demos, or use the ARTag API to customize your own AR applications.

Table of Contents

About Augmented Reality	p. 1
What Is Augmented Reality?	p. 1
The Origins	p. 2
Magic Lens vs. Magic Mirror	p. 3
Marker vs. Markerless AR	p. 4
Examples of Applied AR	p. 7
Getting AR Running	p. 17
Augmented Reality Setup	p. 17
More ARTag Demos	p. 21
Diagnosing Issues with the AR Demos	p. 27
Computer Graphics Basics	p. 31
The Pinhole Model	p. 31
Transferring 3D Points Between Coordinate Systems	p. 37
Transferring Points Using Matrix Math	p. 39
The Rendering Pipeline	p. 45
Viewing Frustum and Clipping Planes	p. 47
Scan-Line Converting Polygons	p. 51
Summary of Rendering Procedure	p. 52
Using OpenGL with Augmented Reality	p. 55
About OpenGL	p. 56
Basic OpenGL Demo	p. 57
Compiling for Windows	p. 58
Compiling for Linux	p. 58
Compiling for Mac OS X	p. 60
The OpenGL Template Program	p. 61
Setting the Frustum	p. 65
Translate Rotate Scale	p. 70
The Matrix Stack	p. 73
Motion Example Program	p. 75
Other Graphics Primitives: Polygons and Triangle Strips	p. 79
Rendering with Pointers	p. 83
Rendering with Indices	p. 83
The OpenGL glDrawElements Function	p. 87
Introduction to AR Programming	p. 93
AR Development Setup	p. 94
A Note About Textures and OpenCV	p. 95
Compiling AR Projects for Linux	p. 96
Compiling ARTag Projects	p. 96
Revisiting Demo Customization	p. 105
Configuring Your Camera	p. 107
ARTag Marker Format	p. 111
Writing Applications for ARTag	p. 117
Introduction to ARTag Applications	p. 117
ARTag Functions	p. 117
Using ARTag Functions	p. 119
Getting the ARTag SDK	p. 119
Camera Input to Your Program	p. 120
Basic OpenGL Program Running with ARTag	p. 120
Motion and Multiple Array Objects	p. 129
Initializing and Terminating AR Applications	p. 136
Detecting Markers	p. 138
Setting Virtual Camera Viewpoint	p. 139
Finding Marker Array Size	p. 140
Mapping Between Objects	p. 141
Mapping from Objects to the Image	p. 142
Creating Marker Patterns	p. 142
Miscellaneous Functions	p. 145
Performance Issues	p. 146
Scale Issues with Array Dimensions	p. 146
Automatically Sizing Augmentations to Array Size	p. 150
Using artag_project_between_objects	p. 153
Model Loading and Rendering	p. 159
A Textured Polyhedral Model	p. 160
OBJ File Format: Sneak Peek	p. 165
Reorganizing a Model for Single Indices	p. 166
More About OpenGL's glDrawElements	p. 169
The OBJ File Format	p. 172
Highgui: Reading JPEG, BMP, and TGA Textures	p. 184
VRML Files	p. 185
Using ARTag's Mesh Manager	p. 188
Conclusions	p. 192
Your Own AR Game	p. 195
Basic ARTag OpenGL AR Program	p. 198
Add Some Walls to Make a Maze	p. 202
Add a Keyboard-Controlled Tank	p. 208
Multiple Tanks, Simple Animations, and the Request-Simulate Architecture	p. 211
Preventing Tanks from Driving Through Walls	p. 221
Add Flying Missiles	p. 222
Summary	p. 230
Enhancing Your AR Game	p. 231
AI for Robot Tanks	p. 231
Vision for Robot Tanks	p. 235
Behavior #1: Firing a Missile	p. 242
Behavior #2: Rotating to Face the Enemy	p. 243
Behavior #3: Responding to Attack	p. 245
Moving Tanks	p. 245
Behavior #4: Moving Agents: Getting from Point A to B	p. 248
Path Planning	p. 254
Behavior #6: Patrolling	p. 264
Behavior #5: Helping	p. 269
Complete Tank Wars	p. 272
Conclusions to Tank Wars	p. 272
Expanding Tank Wars	p. 274
How Does ARTag Work?	p. 279
The ARTag Marker System	p. 279
When to Use ARTag	p. 284
Fiducial Marker Systems	p. 286
Comparing Fiducial Marker Systems	p. 289
ARTag Markers Using Arrays	p. 290
Further Reading on ARTag	p. 293
Troubleshooting	p. 295
General Issues	p. 295
Webcam Issues	p. 295
ARTag Issues	p. 295
ARTag Development Issues	p. 298
Linux Issues	p. 300
OpenCV Issues	p. 300
Acknowledgments	p. 301
Glossary	p. 303
Index	p. 305
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