Computational explanations for color transparency

A computational theory of color transparency for color images containing X-junctions is described. This theory is based on physical models of color transparency under conditions of additive or subtractive color mixture which describes the relationship among four different colors at an X-junction. Algorithms are derived for recovering transmittance of a transparent medium and reflectance of a surface behind the transparent medium from a set of sensor response at an X-junction. The algorithm is based on the ability to describe surface reflectance and transmittance using a linear combination of orthogonal basis functions