Retrofittable apparatus for converting a substantially...

G - Physics – 06 – K

Patent

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G06K 11/06 (2006.01) G06F 3/033 (2006.01)

Patent

CA 2281778

A graphic data-acquisition system which employs an active tracking system provides a retrofittable apparatus for converting a substantially planar surface into an electronic data capture device, in which the components of the system are readily retrofittable, at relatively low cost, to a wide variety of otherwise conventional writing-surface structures, such as so-called dry-erase whiteboards. Conventional triangulation techniques are used to track the position and motion of a writer or eraser. An encoding facility associated with the writing implement provides the ability to distinguish whether the writing implement is used for marking or as an erasing implement, as well as determining the nature or character of written line width or eraser swath. A data stream thus generated can be used in a variety of ways, such as, for example, to feed information into the memory of a digital computer, and/or to feed information for transmission to remote stations.

Système d'acquisition de données graphiques utilisant un système de poursuite active constitue un appareil rattrapable pour la conversion d'une surface sensiblement plane en un dispositif électronique de saisie de données, dans lequel les composants du système sont facilement rattrapables, à un coût relativement bas, en une vaste variété de structures classiques de surfaces d'écriture, telles que les tableaux communément appelés à feutre. Les techniques habituelles de triangulation servent à suivre la position et le déplacement d'un feutre ou d'un effaceur. Une fonction de codage associée à l'instrument d'écriture permet de savoir si l'instrument d'écriture sert à marquer ou à effacer et de déterminer la nature ou le caractère de l'épaisseur de la ligne écrite ou de la bande d'effaceur. Un flux de données ainsi généré peut être utilisé de façon très variée, par exemple, pour transmettre des informations dans la mémoire d'un ordinateur numérique et/ou transmettre des informations aux stations à distance.

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