Method and system for identifying illumination fields in an image

摘要

A method for separating a material field from an illumination field in an image is disclosed. According to the method, tokens in the image are identified, and at least one cylinder as predicted by a bi-illuminant dichromatic reflection (BIDR) model is derived from the identified tokens. For each cylinder a material color is obtained, thus the material field for the scene depicted in the image is obtained. The illumination field is obtained by calculating the illumination color from the equation image color = material color * illumination color for the pixels in the image.