Digits detection in watt hour meter
Chun-Ming Tsai, John Kun-Han Li, Shao-Chi Chen · 2018
Camera vision based digits detection in the watt hour meter is a challenging problem. The quality of the camera is affected by the dynamic illumination environment, time variant, camera resolution, camera aging, and variable distance between the watt hour meter and the camera. Furthermore, the digits are in the reverse meter reading region. In this paper, an effective digit detection is proposed to detect the digits in a watt hour meter. The proposed method includes new modified Otsu thresholding method, connected component labeling, noises removal, and digit identification. Experimental results show that the proposed method can be effectively to detect the digits in watt hour meters with non-uniform illumination environment.