Models that use logarithmic and power functons

Abstract

Nowadays, a tremendous speed of computer technologies is being observed. This caused intensive numerous researches in the fields of data protection, information processing and image processing. This article is devoted to computer graphics. To create and manipulate realistic objects in computer graphics one needs to have powerful computers to perform a lot of complicated computations. Though, GPU in modern visual adapters is able to handle very complicated operations during short period of time, a lot of other devices (e.g. hand-held devices) not equipped with GPU require simplification of computations for image shading. Herein we suggest approximation of BRDF (Bidirectional Reflectance Distribution Function) which hard to get computed, by two quadratic polynomials.