In management, as in music, there is a base clef as well as a treble . 管理就像乐曲，有低音和高音。
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Percussion music treats everyone to a toe - tapping and hand - clapping time , even those who can t tell a note from a clef will be able to share in the joy 即使是对音乐一窍不通的人，都会感受到敲击乐所带来的那份洋洋喜气。
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In piano music the upper staff usually has a treble clef and the lower a bass clef , the former usually for the right hand and the latter for the left in music for the piano , or for similar instruments 在钢琴作品中，上面的五线谱通常标有高音谱号，下面的五线谱标有低音谱号，在钢琴作品或类似乐器作品中，前者通常为右手弹奏，后者为左手弹奏。
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In this diploma thesis , the statistic and structural characteristic of musical score image is analyzed and synthesized by relevant technology of image project , pattern recognition , mathematical morphology , software engineering , music knowledge , midi and so on . the concept of direction number has been defined , and then the mathematical morphology theory is used to process musical score image and recognize musical information . specialized direction number algorithms are firstly used to preprocess a musical score image and then recognize stafflines , barlines , pitch , note values , clef , etc . finally the musical information of the musical score image is automatically stored in the midi format 本文利用图像处理、模式识别、数学形态学、音乐知识库与midi等相关技术，分析与综合数字乐谱图像的统计与结构特征，提出了方向数等概念，对乐谱图像进行处理，利用直方图技术与方向数算法识别谱线、小节线、符干等乐谱的主要框架，然后用数学形态学理论识别音高与时值，最后根据这些音乐信息，组合成音乐乐谱信息，并自动转化成midi格式。
