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乐谱图像乐符分割技术


摘 要:提出基于图段拓扑关系的谱线删除方法,以避免谱线过删除现象;提出双向游程编码结合使用的符干分割方法,克服了现有方法对复杂音符适应性差、分割结果不完整等缺陷;提出音符先验知识引导下的符头切割与检测算法,以解决粘连符头的切分问题;提出基于块状体分割和特征检测的符梁分割算法,设计了适用于乐谱版面的文字和线条提取算法。该方法应用在乐谱识别系统中分割乐符具有良好的性能,尤其对乐谱内容复杂、乐符排列密集等情况有较强适应能力。
  关键词:光学乐谱识别; 谱线删除; 乐符分割; 文字提取; 游程编码
  中图法分类号: TP391.41
  文献标志码:A
  
  文章编号:1001-3695(2010)02-0784-04
  doi:10.3969/j.issn.1001-3695.2010.02.108
  
  Music symbols segmentation in music score images
  
  LIU Xiao-xiang
  
  (Dept. of Computer Science, Zhuhai College, Jinan University, Zhuhai Guangdong 519070, China)
  
  Abstract: Firstly,proposed a staff lines removal approach based on analyzing topological relationship among run-length segments, as a result, staff lines over-removal could avoid. Secondly,proposed a stems segmentation approach, using both vertical and horizontal run-length coding. It could overcome the weaknesses of current methods such as the fragmentary results and poor adaptability to the complex notes. Thirdly,presented an approach for note heads segmentation, employing the prior know-ledge of music notes to split and separate touched note heads. Lastly,designed a block-based approach for beam segmentation and an applied approach for text and curves extraction. Implemented the approaches in one optical music recognition system. It shows good performance and powerful adaptability, especially for the situation of intensive layout of music symbols, or the case of complicated music score images.Key words:optical music recognition; staff lines removal; music symbols segmentation; text extraction; run-length coding ......
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