方向数 meaning in English

direction numbers
direction ratios
directional number

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。