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Lighttracker
Lukas Huber, Patrick Schubert, Yasad Rabady (AT)
Prix Ars Electronica 2007 Honorary Mention “u19 – freestyle computing”
Lighttracker enables the computer to calculate the position of a light source that is within the field of vision of a video camera. For this purpose, the analog black-and white video signal is processed and analyzed. A video camera from a door intercom system was used as camera. Three Pascal programs analyze the signal that is transmitted via the computer’s audio input line. Program 1 (by Yasad Rabady) converts WAV samples into ordinary numbers in text form. Program 2 (by Lukas Huber) displays the data on the screen oscillographically. Program 3 finds the lightest spots in an image and calculates the position of the light source. To improve orientation, the alternating signal of the data stream is analyzed. This is done, as a rule, only for one coordinate, the horizontal X coordinate.
Source: Lukas Huber, Patrick Schubert, Yasad Rabady (AT)
Cross-reference: The right to reprint is reserved for the press; no royalties will be due only with proper copyright attribution.
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Prix Ars Electronica - International Competition for Cyberarts 
