piekarski-slides-lca.. - Tinmith Augmented Reality Project

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Capturing video• Previous example showed how to display video• Now we show how to grab this video• Capturing video is supported under Linux• 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 much36 Wayne Piekarski Wearable Computer Lab CIS @ UniSA http://www.tinmith.net/lca2005lca 2005
Video 4 Linux• 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 conversion37 Wayne Piekarski Wearable Computer Lab CIS @ UniSA http://www.tinmith.net/lca2005lca 2005
Page 1 and 2: Building User Interfaces With Video
Page 3 and 4: What is this tutorial not about?•
Page 5 and 6: Lazy like a fox• Teach you intere
Page 7 and 8: Immersive 3D graphics• My researc
Page 9 and 10: Optical augmented reality• Hard t
Page 11 and 12: Outdoor augmented reality• My res
Page 13 and 14: Tinmith mobile 3D modelling• Glov
Page 15 and 16: ARQuake demonstration• Play demo
Page 17 and 18: Processing• We need to carry suff
Page 19: Free beer AR• AR and VR are domin
Page 22 and 23: Distribution installation• I curr
Page 24 and 25: 3D graphics infrastructure24lca 200
Page 26 and 27: OpenGL advantages• Previously, re
Page 28 and 29: Nvidia and ATI• Nvidia provide we
Page 30 and 31: Learning OpenGL• OpenGL Red Book
Page 32 and 33: Catches of OpenGL• Pipelined in v
Page 34 and 35: • Work through example code hereV
Page 38 and 39: Video 4 Linux• If you have troubl
Page 40 and 41: libDC video capture• The libDC li
Page 42 and 43: Tricks to using DC devices• 2.4 k
Page 44 and 45: Intro to vision tracking• We can
Page 46 and 47: Pulling apart 4x4 matrices• Compu
Page 48 and 49: Using ARToolKit as a tracker• I u
Page 50 and 51: Custom hardware50lca 2005
Page 52 and 53: WCL Project Oxcart• Repair damage
Page 54 and 55: Parallel port• 25-pin D shell con
Page 56 and 57: Serial RS-232• Needs extra hardwa
Page 58 and 59: Cheap hacks• USB mice have three
Page 60 and 61: Conclusion• We have talked about

piekarski-slides-lca.. - Tinmith Augmented Reality Project

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