Distinguishing metallic and nonmetallic textures through polarization imaging

This paper introduces a novel approach leveraging polarization imaging to distinguish metallic and non-metallic textures, By employing a four-phase polarization photography technique, the method captures the unique polarization characteristics of light reflected from different material surfaces. Metallic surfaces, dominated by specular reflection, exhibit distinct polarization patterns compared to non-metallic surfaces, which primarily demonstrate diffuse reflection. The proposed photography system follows the CIE viewing geometry 45/0 to processes these polarization images to effectively classify and differentiate between the two material types. Using the polynomial classification, the pretrained samples with different colors were effectively categorized into metallic and non-metallic textures.