DEVICES, SYSTEMS, AND METHODS FOR CLASSIFYING MATERIALS BASED ON A BIDIRECTIONAL REFLECTANCE DISTRIBUTION FUNCTION

摘要

Systems, devices, and methods for classifying a sample by material type measure a reflection of a sample at an illumination angle and an observation angle in at least two spectral bands, calculate a feature value for the sample based on an estimated ratio value of the at least two spectral bands of the measured reflection, and classify the sample based on the feature value.