Linux Conf Au 2002 Presentation - Tinmith Augmented Reality Project

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Catches of OpenGL • Pipelined in video card to maximise performance • May introduce some latency, not sure how much • Doesn’t seem to cause a problem for live video though • OpenGL is just a renderer, whereas X has toolkits on top of it like Qt and GTK • I guess that some of these have been ported though 32 Wayne Piekarski Wearable Computer Lab CIS @ UniSA http:/ / www.tinmith.net/ wayne lca 2004
Useful example • X has trouble displaying live video • MIT SHM, Xvideo, DGA, etc • Each driver in XFree86 supports some but not others • You have to write your client to support all of them! • X doesn’t expose the entire acceleration of the video card • OpenGL can display texture maps natively • Not just render but perform warping, scaling, etc • Can render to flat 2D or any 3D polygon! • OpenGL is written to assume acceleration, so it will take advantage of as much as is available • Supports auto format conversions (RGB, YUV, B&W) • Show application demo here 33 Wayne Piekarski Wearable Computer Lab CIS @ UniSA http:/ / www.tinmith.net/ wayne lca 2004
Page 1 and 2: Hacking Your Own Virtual and Augmen
Page 3 and 4: What is this tutorial not about?
Page 5 and 6: Lazy like a fox • Teach you inter
Page 7 and 8: Immersive 3D graphics • My resear
Page 9 and 10: Optical augmented reality • Hard
Page 11 and 12: Outdoor augmented reality • My re
Page 13 and 14: Tinmith mobile 3D modelling • Glo
Page 15 and 16: ARQuake demonstration • Play vide
Page 17 and 18: Processing • We need to carry suf
Page 19 and 20: Free beer AR • AR and VR are domi
Page 21 and 22: Distribution installation 21 lca 20
Page 23 and 24: Software requirements • Does not
Page 25 and 26: Graphics libraries • Xlib • Exi
Page 27 and 28: 3D hardware is cheap • Nowadays 3
Page 29 and 30: Nvidia and ATI • Avoid other hard
Page 31: Using OpenGL • I write most of my
Page 35 and 36: Live video capture 35 lca 2004
Page 37 and 38: Video 4 Linux • V4L was the first
Page 39 and 40: Firewire video capture • Linux ha
Page 41 and 42: Using DC devices • The RGB24 mode
Page 43 and 44: Vision tracking 43 lca 2004
Page 45 and 46: • Capture video frame • Extract
Page 47 and 48: Example matrix operations • Ident
Page 49 and 50: Tracking position in a room • Mul
Page 51 and 52: • Hacking is not just about softw
Page 53 and 54: Interfacing technology • Parallel
Page 55 and 56: Serial RS-232 • 9-pin D shell con
Page 57 and 58: Dumb controller boxes • You can b
Page 59 and 60: Conclusion 59 lca 2004
Page 61: • Good luck, and don't fry your h

Linux Conf Au 2002 Presentation - Tinmith Augmented Reality Project

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