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Infrared image edge detection of high-voltage transmission line
Author(s): 
Pages: 31-33
Year: Issue:  1
Journal: ELECTRIC POWER

Keyword:  输电线路红外图像Roberts算子边缘检测;
Abstract: 高压输电线路的导线、金具及绝缘子串等的红外图像的特点有:边缘模糊,对比度差,空间域上存在孤立的点和小块噪声.采用中值滤波方法,在保护图像边缘细节信息的前提下有效地降低了图像空间域高频噪声,用分段线性灰度变换增强了图像边缘的对比度,提高了图像的温度分辨力和空间分辨力.通过对Roberts边缘算子、Sobel边缘算子、Prewitt边缘算子、Laplace边缘算子和Laplace改进算子等常用边缘检测算子对噪声的抑制效果和边缘定位精度的对比分析,选用Roberts算子完成了图像的边缘轮廓检测,并对不连续边缘进行跟踪和连接,得到了清晰连续的图像边缘,完成了高压输电线路红外图像的边缘特征提取.以一幅耐张绝缘子串的红外图像为应用实例,验证了图像预处理及边缘检测方法的有效性.
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