Computer vision based unistroke keyboard system and mouse for the handicapped

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Erdem M., Erdem I., Atalay V., Cetin A.

4th International Conference on Multimedia and Expo (ICME 2003), Maryland, United States Of America, 6 - 09 July 2003, pp.765-768 identifier identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/icme.2003.1221729
  • City: Maryland
  • Country: United States Of America
  • Page Numbers: pp.765-768
  • Middle East Technical University Affiliated: Yes


In this paper, a unistroke keyboard based on computer vision is described for the handicapped. The keyboard can be made of paper or fabric containing an image of a keyboard, which has an upside down U-shape. It can even be displayed on a computer screen. Each character is represented by a non-overlapping rectangular region on the keyboard image and the user enters a character by illuminating a character region with a laser pointer. The keyboard image is monitored by a camera and illuminated key locations are recognized. During the text entry process the user neither have to turn the laser light off nor raise the laser light from the keyboard. A disabled person who has difficulty using his/her hands may attach the laser pointer to an eyeglass and easily enter text by moving his/her head to point the laser beam on a character location. In addition, a mouse-like device can be developed based on the same principle. The user can move the cursor by moving the laser light on the computer screen which is monitored by a camera.