以菲涅尔偏振反射理论为依据, 将入射光进行电矢量分解, 推导出影响眩光强度的偏振因子, 并分析该因子在眩光消除中所起的主导作用.根据成像检测模型, 推导出决定眩光位置和眩光区域大小的位移因子, 并分析该因子在眩光消除中起的辅助作用.测量工业上某种工件在相同环境中不同条件下的图像, 将所得图像数据进行抽样对比, 得到在不同偏振和不同位置情况下的图像灰度变化曲线.分析灰度变化曲线与偏振及位置的关系, 并对所提出的理论加以验证.结果表明眩光消除的本质是降低眩光区域与邻域区域之间的光强对比度, 对位移因子和偏振因子的联合调动可实现对眩光几乎完全的消除.

Based on the theory of the Fresnel polarization reflectance, the polarization factor was put forward by decomposing the incident light into electric vector, which could affect the intensity of glare and play a leading role during eliminating glare. According to the imaging detection model, the displacement factor was presented, which could change the glare position and the size of the glare area, and play a supplementary role during eliminating glare. The image gray-scale transformation curves under different polarizations and different positions were gained by sampling and contrasting the image datas of a certain object, and these image data were measured in the equivalent environment while different situations. The proposed theory was verified by analysing the relationship of gray-scale transformation curve with polarization and position. The results show that the essence of glare eliminating is reducing the light intensity and contrast between with the glare area and neighborhood region. Furthermore, the joint mobilization of the displacement factor and polarization factor can almost eliminate the glare completely completely.