一种基于Hough变换的继电保护自动装置压板定位方法

A positioning method for pressure plates of automatic relay protection devices based on Hough transform

目前用于继电保护自动装置压板智能图像识别方法存在对压板开合状态识别偏差大,受图像多余信息干扰无法准确识别压板开合状态等问题。提出了一种基于图像预处理及Hough变换,通过对压板原始图像进行图像降噪、边缘检测等处理,并使用改进Hough变换对处理后的压板图像进行变换和直线检测,实现继电保护自动装置压板的目标定位。试验结果表明,所提出的方法可裁剪原图像中多余无用的信息,减少了后续智能识别图像处理的数据量,准确定位压板在图像中的位置。

The current intelligent image recognition method applied for pressure plates of automatic relay protection devices has problems such as large deviations in switching status recognition for pressure plates and inaccurate identification of pressure plates'switching statuses due to the interference of redundant information in images.We propose a positioning method for pressure plates of automatic relay protection devices based on image pre-processing technology and Hough transform.By processing the original image of the pressure plate with image denoising and edge detection,the method can make line detection on the processed pressure plate images based on improved Hough transform,realizing the positioning for pressure plates of automatic relay protection devices.The proposed method reduces the amount of data for the subsequent intelligent image recognition by removing the redundant and useless information away from the original image.The test results show that the method can locate the pressure plate in the image.