Development of an Augmented Reality system using ARToolKit
Development of an Augmented Reality system using ARToolKit
Development of an Augmented Reality system using ARToolKit
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<strong>Development</strong> <strong>of</strong> <strong>an</strong> <strong>Augmented</strong> <strong>Reality</strong> <strong>system</strong> <strong>using</strong> <strong>ARToolKit</strong> <strong>an</strong>d user invisible markers<br />
Hauppage WinTV-PVR<br />
There has been <strong>an</strong> example <strong>of</strong> <strong>an</strong> AR application for museum artefact visualization that<br />
used <strong>ARToolKit</strong> together with a Hauppage WinTV-PVR video capture card [8]. This<br />
shows that there exists a possibility to have a frame grabber <strong>an</strong>d <strong>ARToolKit</strong> work<br />
together. From the source it is not completely clear which type <strong>of</strong> frame grabber was<br />
used. There are several available. Here will be described the oldest model, WinTV-<br />
PVR350 because it will have lower price, but <strong>of</strong>fers the same basic functionality.<br />
The frame grabber is delivered as a PCI card. Captured video c<strong>an</strong> be stored on hard disk<br />
or sent to a monitor in real time. Input to the frame grabber is either NTSC or PAL.<br />
Using NTSC display rate is 30fps, Full D1: 720x480, MPEG1: 352x240. In Figure 4.21<br />
<strong>an</strong>d Figure 4.22 are displayed the frame grabber itself <strong>an</strong>d its <strong>system</strong> requirements.<br />
Again these are not expected to give problems. The frame grabber is available at<br />
http://www.mini-itx.com. The total price is €215,67, including tax <strong>an</strong>d shipping costs.<br />
Requirements<br />
• Pentium III 730MHz or faster<br />
• Windows XP/2000<br />
• Free PCI slot<br />
Figure 4.21 WinTV-PVR350 Figure 4.22 Requirements<br />
4.4 Firewire board camera<br />
The hardware components described before are all me<strong>an</strong>t to provide a solution in<br />
cooperation with the described IR bullet cameras, which have a perm<strong>an</strong>ent IR filter<br />
installed. There also exists a second possibility that implicitly make use <strong>of</strong> the described<br />
IR filters. This m<strong>an</strong>ner will be more extensive <strong>an</strong>d there exists more uncertainty about<br />
successful results. What needs to be done is that a camera m<strong>an</strong>ually is taken apart, the<br />
IR blocking filter is removed <strong>an</strong>d that the IR filter is installed. But several problems<br />
may arise; the camera may be damaged, the IR filter may not fit or the images may not<br />
be <strong>of</strong> good quality.<br />
The process <strong>of</strong> removal the IR blocking filter c<strong>an</strong> be tried with <strong>an</strong>y camera, but again<br />
the weight <strong>of</strong> the camera should not be too high. Therefore first has been tried to find<br />
suitable cameras. These cameras are <strong>of</strong> type board level camera. Two <strong>of</strong> such cameras<br />
are described now.<br />
The model that is described first is the Dragonfly, delivered by Point Grey Research,<br />
http://www.ptgrey.com. The camera is delivered with a 1/3” Sony CCD image sensor; it<br />
has dimensions <strong>of</strong> 2.5”x2.0 inches, or 63.5x50.8mm. Different options are available for<br />
the resolution, either 640x480 or 1024x768. Also Colour or Black <strong>an</strong>d White c<strong>an</strong> be<br />
chosen for. The 640x480 version c<strong>an</strong> deliver a frame rate up to 30fps. The camera has<br />
<strong>an</strong> IEEE 1394 interface. Together with the camera are delivered a 6pin IEEE 1394 cable<br />
<strong>an</strong>d <strong>an</strong> IEEE 1394 PCI interface card. This constitutes all for having the camera<br />
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