본문 바로가기
  • Home

Image-based Water Level Measurement Method Adapting to Ruler's Surface Condition

  • Journal of The Korea Society of Computer and Information
  • Abbr : JKSCI
  • 2010, 15(9), pp.67-76
  • Publisher : The Korean Society Of Computer And Information
  • Research Area : Engineering > Computer Science

Jaedo Kim 1 Youngjun Han 2 Hernsoo Hahn 2

1숭실대학교 전자공학과
2숭실대학교

Accredited

ABSTRACT

This paper proposes a image-based water level measurement method, which adapt to the ruler's surface condition. When the surface of a ruler is deteriorated by mud, drifts, or strong light reflection, the proposed method judges the pollution of ruler by comparing distance between two levels: the first one is the end position of horizontal edge region which keeps the pattern of ruler's marking, and the second one is the position where the sharpest drop occurs in the histogram which is construct using image density based on the axis of image height. If the ruler is polluted, the water level is a position of local valley of the section having a maximum difference between the local peak and valley around the second level. If the ruler is not polluted, the water level is detected as the position having horizontal edges more than 30% of histogram's maximum value around the first level. The detected water level is converted to the actual water level by using the mapping table which is construct based on the making of ruler in the image. The proposed method is compared to the ultrasonic based method to evaluate its accuracy and efficiency on the real situation.

Citation status

* References for papers published after 2022 are currently being built.

This paper was written with support from the National Research Foundation of Korea.