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Staff-line Detection and Removal Algorithm for Mobile Phone-based Recognition of Musical Images

카메라 기반 악보 영상 인식을 위한 오선 검출 및 삭제 알고리즘

  • 손화정 (전남대학교 공과대학 전산학과) ;
  • 김수형 (전남대학교 공과대학 전산학과) ;
  • 오성열 (전남대학교 공과대학 전산학과)
  • Published : 2007.11.30

Abstract

In this paper, we propose a staff-line detection and removal algorithm from a music score image obtained by a mobile phone camera. As a preprocessing technique to recognize a music score image, staff-line detection and removal should be efficiently applied to the skewed or curved images. The proposed method detects a staff-line by dividing a staff according to the degree of distortion. The number of division is calculated by dividing a staff repletely until an average of differences of y coordinates in every divided position is smaller than a threshold. Therefore, the number of division can be adaptively estimated according to the degree of the distortion. For an experiment, we make various kinds of images by rotating one from $1^{\circ}\;to\;3^{\circ}$ or curving slightly upward. The results show that the proposed method performed well on the experiment images.

Keywords

Music Score Recognition;Staff-line Detection and Removal