金属表面特性对差动式视觉测量的影响实验

Experiments on Metal Surface Characteristics′ Effect on Differential Visual Measurement

介绍了一种全面的金属表面反射模型,从理论上论证差动式视觉测量的可行性。在平行光照明下,测量不同级别粗糙度比较样块在入射面内的反射亮度,在大量数据的基础上总结分布规律,以寻求事实依据。搭建视觉测量系统,采集金属工件的明、暗域图像,并对图像差分融合,进行实验验证。结果表明,工件表面的缺陷信息得到了大幅增强,杂乱的背景信息被有效抑制。基于金属表面反射特性提出的差动式视觉测量系统,在提高图像对比度和增强边缘方面显示了其优越性。

A comprehensive metal surface reflection model is introduced to demonstrate the feasibility of the differential visual measurement theory.In order to seek the factual basis,the reflection brightness of some roughness comparison specimens is measured in the plane of incidence,and then the distribution law is summarized based on a large amount of data.A vision system is built,and the images collected from the bright and dark fields are fused by differential algorithm.Experimental results show that the target surface defects are greatly enhanced and the clutter background information is effectively suppressed.The differential visual measurement system based on the reflective properties of the metal surface shows its superiority in improving contrast and enhancing edge of images.