Converter From Visual Curves to Auditory Cues for Blind Persons
Original Publication Date: 1989-May-01
Included in the Prior Art Database: 2005-Jan-28
Disclosed is an invention which allows blind persons to "visualize" graphs, curves and simple drawings, either on paper or on a computer screen. It converts the picture into a sequence of tones which conveys the information in the picture in an intuitive way. This invention has two aspects: a concept and an implementation. The concept is to convert a simple line drawing, such as a graph, curve, or simple diagram, into a sequence of tones at different pitches in such a way that a blind person can "hear" the shape of the lines and curves. As one scans a vertical line across the picture from left to right, the height of each intersection of the scan line with the picture is converted into a tone whose frequency depends on the height, that is, on the y coordinate of the point.