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 />
The camera has a frame rate <strong>of</strong> 29.97 fps ≈ 30 fps. The image sensor is 1/3 CCD with<br />
290,000 CCIR pixels. The output <strong>of</strong> the camera is st<strong>an</strong>dard composite video, 75ohm,<br />
1Vp-p. This is the st<strong>an</strong>dard for almost all consumer video equipment. It is also known<br />
under the name RS-170 NTSC. This signal combines three pieces <strong>of</strong> information in one<br />
signal (http://www.datapro.net/videodoc.html#Page04). These are colour, brightness<br />
<strong>an</strong>d synchronization data. In Figure 5.8 the camera is displayed to show its size<br />
compared to a coin. The weight <strong>of</strong> the camera is 50 grams. Together with the camera are<br />
delivered a mounting bracket, mounting screws <strong>an</strong>d integral power <strong>an</strong>d video<br />
connectors. In Figure 5.9 are all the components together with the camera are shown.<br />
There are several options to choose for the IR filter; 715, 780, 830, 850 or 1000nm. All<br />
cameras with different options have the same price <strong>of</strong> $99. As with before mentioned<br />
prices, also this does not include h<strong>an</strong>dling costs, administration costs <strong>an</strong>d shipping costs.<br />
Figure 4.10 Bullet camera Figure 4.11 The complete component set<br />
4.3.1 Power supply<br />
The camera needs a 9-12 VDC power supply. Tr<strong>an</strong>sformer power supplies c<strong>an</strong> result in<br />
voltage surges that will damage the camera. Therefore it is advised to make use <strong>of</strong> a<br />
regulated power supply. This takes as input <strong>an</strong> input voltage <strong>of</strong> 100 to 240 Volts AC<br />
(alternating current), 50 to 60 Hz. In Spain the st<strong>an</strong>dard voltage used is <strong>of</strong> type 230V<br />
AC, 50Hz (http://www.school-for-champions.com/ science/ac_world_volt_freq.htm).<br />
This regulated power supply will output a stable, regulated 12VDC. Figure 4.12 shows<br />
such a power supply. It has a price <strong>of</strong> $15, again extra costs are not included.<br />
Figure 4.12 Power supply<br />
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