Method for rectifying image deviation based on perspective transformation

2017 2nd International Seminar on Advances in Materials Science and Engineering

Li, Xin^1 ; Li, Shengrong^1 ; Bai, Wei^1 ; Cui, Xiaoxiao^2 ; Yang, Guoqing^2 ; Zhou, Hao^2 ; Zhang, Chuanyou^2

State Grid Qinghai Electric Power Maintenance Company, Xi'ning, China^1

Shandong Luneng Intelligence Technology Co. Ltd., Jinan, China^2

关键词: Canny Operators;    Digital image processing technologies;    Edge features;    High-precision;    Image rectification;    Perspective transformation;    Rotation operations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/231/1/012029/pdf
DOI  :  10.1088/1757-899X/231/1/012029

来源: IOP

【 摘 要 】

A new method for rectifying image deviation of circular instrument based on perspective transformation is presented in the paper, and the correction of circular instrument image in substation environment is realized. First of all, the digital image processing technology is used to pre-process the site image. Secondly, Canny operator is used for edge detection. According to the edge feature points, the equipment area is detected and the regional parameters can be computed. Then the perspective transformation is used to correct the image, and the positive image of the circular instrument image is obtained. Finally, the corrected tilt image is done by the rotation operation. Experimental results show that the algorithm can realize image rectification, which is simple with fast speed and high precision. The proposed method is helpful for the further recognition.