基于图像亚像素二次定位的电缆护套厚度精确测量

Precise measurement of cable sheath thickness based on sub-pixel image positioning

图像测量技术作为一种新兴的高性能测量技术,近年来在测量领域中占据越来越重要的地位。它具有非接触,精度高,速度快等优点,如今已广泛被用在几何尺寸测量领域。文中提出了一种改进的Sobel边缘检测技术和一种基于Gaussian-Hermite矩的亚像素重定位算法,并在电缆护套材料厚度测量系统中应用这两种算法,实现快速、精确测量。

Image measurement technique has been a new high-performance measurement technology in recent years, it occupies an increasingly important position in the measurement field. It has been widely used in geometry measurement field because of its advantages of non-contact, high accuracy, and high speed. This paper puts forward an im- proved Sobel edge detection technique and proposed a new sub-pixel edge detection algorithm based on the Gaussian- Hermite moments. Then it was applied in the cable sheath material thickness measurement system and achieved a precise and fast measurement.