A METHOD TO SPEED-UP RETINEX-TYPE ALGORITHMS

摘要

An apparatus, and a corresponding method, are usable for speeding up Retinex processing of an input image. The apparatus includes a down sample module (110) having a sub-sampling algorithm, where sub-sampled images of the input image are produced, and a non-linear illumination estimation module (120) that receives the sub-sampled images and produces corresponding interim illumination estimations. Finally, the apparatus includes an up sample module (140) including one or more up-sampling algorithms (150). The interim illumination estimations are interpolated (152) to produce an illumination estimation, and the illumination estimation is usable to perform a Retinex correction to the input image.