TY - RPRT TI - Ambient illumination and the determination of material changes. AU - R Gershon AU - A D Jepson AU - J K Tsotsos PY - 1986 DO - 10.1364/josaa.3.001700 UR - https://pubmed.ncbi.nlm.nih.gov/3772632/ ID - 3772632 ER -