KnowWhere: An audio/spatial interface for blind people
Krueger, Myron W
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The KnowWhere™ System was developed to present geographic information to blind people. The user's hand rests upon an illuminated surface which has been covered with a tactile grid and is viewed by a ceiling-mounted video camera. The video image is analyzed by specialized processors and the location of the user's fingertip on the light table is determined. An invisible virtual map is defined on the desk surface and the feature that the user is currently pointing to is signalled by a sound which serves to identify the feature or kind of feature that has been "touched."