基于Sobel算子边缘检测的仪表盘二值化阈值算法

摘要

This paper introduces a threshold method for pointer meter images according to the characteristic of the images as well as processed images using homomorphic filtering. It is a threshold method based on edge detection with Sobel operator. And a threshold is achieved via the statistics of the neighbor point set of edge points. The feasibility of these two threshold methods is verified by experimental results.%　　针对仪表盘和同态滤波后图像的特点，提出了一种基于边缘检测的二值化阈值计算方法。该方法基于Sobel算子对图片进行边缘检测，然后根据边缘像素点相邻点的灰度，统计数据计算阈值。实验表明，该方法对不同环境下的仪表盘图像有较好的二值化处理结果。