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Music score recognizing method and computer-readable recording medium storing music score recognizing program
Music score recognizing method and computer-readable recording medium storing music score recognizing program
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机译：乐谱识别方法和存储乐谱识别程序的计算机可读记录介质
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摘要
Projections onto the transverse axis are derived from a staff start position xs to a staff end position xe with respect to four staff sections surrounded by staff positions L(5) of L0 to L4 set per sign. If a width of a section x1-x2 where a value of the projection exceeds a given threshold value thr1 exceeds another given threshold value thr2, a rectangle surrounded by x1, x2, L0 and L4 is set to be a label for extracting a feature of the corresponding sign. The foregoing four staff sections which do not overlap with a staff image are set to be extracting sections in the label for obtaining peripheral features in the transverse direction. The peripheral features are derived up to the third order from the left and right ends in each extracting section. Further, each extracting section is divided into a plurality of mesh sections which are set so as to partly overlap with each other in the height direction. The mean value of the peripheral features in each mesh section is derived per order and set to be a feature amount in each mesh section. This is derived for each of the left and right ends and per mesh section and set to be a feature of the label. The sign having a fixed position on the staff or having the staff in a grid in a music score image is recognized through pattern matching with features stored in a dictionary. With this arrangement, the music signs are recognized from the music score image, and data is prepared for playing or music score displaying.
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