Image analysis – Applications – Reading maps – graphs – drawings – or schematics
Patent
1995-04-07
1998-01-06
Boudreau, Leo
Image analysis
Applications
Reading maps, graphs, drawings, or schematics
382182, 382203, 84 76, G06K 900
Patent
active
057063630
ABSTRACT:
An automated recognition device for printed music which converts information of the printed music to two-dimensional image data and recognizes notes and signs from this data. Auto-correlation values along a vertical axis are obtained from pixels in a horizontal direction and a first peak is judged to be a line interval of staffs of the printed music. In a second aspect of the invention the number of hooks is determined on the basis of pixel number data existing in the horizontal direction in a region having a predetermined width on both sides of a note. In the third aspect of the invention, image data is removed from a start point by raster scan on the basis of consecutive data. In the fourth aspect of the invention, a shape of a sign in image data is projected on vertical and horizontal axes and the shape of the sign is assumed to exist in rectangular coordinates. The same processing is repeated and the shape of the sign is judged to exist in rectangular coordinates which can not be divided any further.
REFERENCES:
patent: 5042079 (1991-08-01), Morikawa et al.
Hirokazu Kato and Seiji Inokuchi, Treatises of Electrical Information Communication Society, "Automatic Recognition of Printed Piano Music Based on Bar Unit Processing", May 1988, pp. 894-901.
W.J. Kim et al, "Recognition System for Printed Music Score" Aug. 1987 pp. 573-577.
Matsushima et al, "Automated Recognition System for Musical Score", 1985, pp. 25-52.
Boudreau Leo
Kelley Chris
Yamaha Corporation
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