为了降低偏振光成像技术的使用要求，提出了一种环境光照明条件下研究材质分类的方法。根据菲涅耳反射定律，目标表面的反射光带有偏振成份，采用偏振成像探测偏振角得到探测器与反射面的方位角，对偏振片的4个方向强度进行补偿得到被测表面对应的水平与垂直偏振度,通过测量反射光的反射偏振度与反射率比可以分类出目标材质。对橡胶板和金属铝板两种不同材质目标的反射偏振度与反射率比进行了仿真模拟与实验研究，研究结果表明金属与非金属在一定观测角度范围内存在明显的反射率比差异，采用菲涅耳反射率比作为衡量依据可以更有效区分金属与非金属目标。

In order to reduce the requirement of the application of polarization imaging technology, a method of material classification under ambient lighting condition is proposed. According to the Fresnel law of reflection, there are some polarization components with the reflected light on target surface. The azimuth angle between detector and reflector is obtained by detecting the polarization angle, horizontal and vertical polarization degree of the detected surface is obtained by compensating the four directions of the polarizer. The target material can be sorted out by measuring degree of polarization of reflected light and reflectivity ratio. The reflection polarization degree and reflectivity ratio of rubber plate and metal plate are simulated and experimental researched, the results show that there is obvious difference of reflectivity ratio between metal and nonmetal in a certain observation angle range, and the metal and nonmetal targets can be distinguished effectively by using Fresnel reflectivity ratio as a discriminated parameter.