一种基于多元回归的射线数字图像影响因子的权重分配方法

针对微焦点射线机检测印制板组装件得到的射线数字图像的客观评价和主观评价不一致的问题,提出一种基于多元回归的数字射线检测图像影响因子的权重分配方法。对影响射线数字图像质量的因素进行分析,选取影响图像质量的各类12种因子,通过模型诊断,剔除t检验不显著的变量,对模型进行改进。得到包括以均值次数、灰度标准差、噪声、失真度、结构相似度、几何放大倍数为变量与主观评价结果为应变量构建的多元回归模型。试验结果表明,该方法得到的图像综合指数与主观评价结果拟合度较高,可以解决主观判别与客观判决不一致的难题,有效避免了人工判别图像质量不客观的弊端。

Research on Influence of Electromagnetic Interference on X-Ray Digital Detection

X-ray digital imaging technology has found wide application owing to its advantages of real-time, visualization and rapid imaging. In substations the substantial electromagnetic interference has some influence on the live detection by the X-ray digital imaging technology, hindering the promotion of the technology in the detection of electric equipment. Based on a large number of field tests, the author carded out a series of researches on electromagnetic interference protection measures, image de-noising, and image enhancement algorithms.