Linux Conf Au 2002 Presentation - Tinmith Augmented Reality Project

More documents

Recommendations

Info

Capturing video • Previous example showed how to display video • Now we show how to grab this video • Capturing video is supported under <strong>Linux</strong> • Interfaces are non-trivial and tricky to use however • Really needs a nice user land API to simplify it • Developers have to supply a lot of their own code • Not much documentation • Not commonly used, so not maintained as much 36 Wayne Piekarski Wearable Computer Lab CIS @ UniSA http:/ / www.tinmith.net/ wayne lca 2004
Video 4 <strong>Linux</strong> • V4L was the first common kernel API for capture drivers • PCI capture boards, USB cameras • Xawtv display program • Simple interface calls • open() – initialise device • read() – read data from camera, can also use mmap() • ioctl() – configure capture settings • You can specify resolution and pixel format (RGB, YUV) but the device must support it • If not then you must supply your own conversion 37 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 and 32: Using OpenGL • I write most of my
Page 33 and 34: Useful example • X has trouble di
Page 35: Live video capture 35 lca 2004
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

Create successful ePaper yourself

Delete template?

Save as template?