配光与照明对织物疵点信号特征值的影响

Effect of illuminating source and illumination on the signal features of fabric defects

为研究配光与照明光照环境对采集织物图像的影响,根据织物的反射特性、光谱特性、颜色饱和特性等光学性质,分析LED、卤钨灯和荧光灯等配光与照明光照环境及参数,用能量、方差、熵、极差和对比度等方法提取织物图像特征值。分析不同光源照明环境条件下织物疵点信号增强的最佳光照参数。实验结果表明,用不同的光源、不同的光照强度对织物疵点信号的增强是不同的,疵点信号的特征值在不同光照度下有明显的响应和差别,由此得到提取疵点信号所需的最佳照度值。

The aim of the study is to investigate the influence of illuminating source and lighting environment on fabric images collected. Based on optical characters of fabric such as reflection, spectrum and colour saturation, the effects of several kinds of illuminating source such as LED, halogen lamp and fluorescent lamp, lighting environment and parameters on fabric images were analyzed. The methods of energy, variance, entropy, limit deviation and contrast were used to study the features of extraction of fabric image. Their optimal parameters of illumination for enhancement of fabric defect signal were analyzed. The experimental results show that enhancement of fabric defect signal varies with illuminating source and illumination. The respond and difference for defect signal feature are obvious under different illuminations, thereby the best illumination parameter for extraction of defect signal can be obtained.