一种基于Canny边缘检测算法的零件缺陷图像处理方法

近年来,零件缺陷造成的机械安全问题越来越多,影响了机械生产的效率和质量。以准确检测出零件上的螺纹缺陷为研究目的,利用图像处理技术对无螺纹、半螺纹和不规则螺纹等3种螺纹缺陷进行检测。首先,对零件图像进行灰度化、二值化、图像锐化等预处理;然后,利用边缘检测、直线检测、图像旋转和垂直投影等方法对螺纹缺陷进行检测。其中,通过对比6种边缘检测算法的效果,最终采用Canny算法对螺纹缺陷进行检测。

Purchasing policy model based on components/parts unification

This paper presents a mathematical model for components/parts unification (CPU) policy. This model considers two components/parts that are functionally interchangeable but purchased from suppliers with different prices and quality characteristics. Because of the buyer's quality preference and suppliers' discount rates for bulky purchases, the model assists the procurement manager to determine how best to purchase the components/parts to meet its demand while minimizing the total acquisition costs.