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Multitouch Game Table Senior Design Fall 2006

Multitouch Game Table Senior Design Fall 2006. What we did right and what we did wrong… Aditya Mittal James Wallace Albert You Paul Ferrara. Recap of What we are doing. We are building a touch screen game table Last semester we developed 3 small prototypes of a touch screen

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Multitouch Game Table Senior Design Fall 2006

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  1. Multitouch Game TableSenior Design Fall 2006 What we did right and what we did wrong… Aditya Mittal James Wallace Albert You Paul Ferrara

  2. Recap of What we are doing • We are building a touch screen game table • Last semester we developed 3 small prototypes of a touch screen • The touch screens were created by using infrared LED’s shining into an acrylic sheet and detecting them with a webcam covered with camera film to act as an infrared camera

  3. Prototype 1 • The wooden frame was not sturdy, this led to poor internal reflection of the infrared wavelengths in the acrylic • Immediately we proceeded to the construction of prototype 2

  4. Prototype 2 • The soldering job on the LED’s was poor and the spacing between them was bad • There were simply not enough LED’s installed into the frame leading to poor contrast and lots of random IR detections artifacts in places where no touches were made

  5. Prototype 3 • The best of the 3 prototypes with a sturdy wooden frame, the LED’s spaced out evenly and enough of them to give good contrast and detect finger(s) • The problem with this prototype was that it still included additional noisy infrared detections along the side of the frame, coming from the LED’s sticking too far in and not being covered by the wooden frame • It was however good enough to help us lead into the production of a full size touchscreen

  6. The Driver • A basic driver was formulated for testing the prototype touch screen • This driver used direct show filtering to detect basic motions of the areas of the screen being touched and display them as rectangles on the screen • No processing based upon these detected areas was done yet

  7. The Driver (cont.) • The current driver is very inefficient and uses up unnecessary CPU power • The current driver did not include erosion filtering which reduces the noisy image generated by the webcam which results in artifacts where there is no motion made

  8. Final Comments • We are currently optimizing the driver • Working on hand gesture algorithms • Mirrors and Lens reflection calculations for proper rear view projection from the projector • We need to line up the back of the acrylic with tracing paper for projecting onto the surface so the projector image does not shine into the eye

  9. Thank you • Multitouch Gameboard Team

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