The Kubelka-Munk (K-M) theory is based on light absorption and partial scattering. Kubelka and Munk formulated this theory to model the resultant light emerging from translucent and opaque media, assuming that there are only two light channels traveling in opposite directions. The light is being absorbed and scattered in only two directions: an upward beam J and a downward beam I, as shown in Fig. 16.1. A background is presented at the bottom of the medium to provide the upward light reflection.
This chapter presents the fundamentals of the K-M theory, spectral extension, cellular extension, and a unified global theory.
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