Color Constancy from Image Transformations in JPEG and JPEG2000

Summary form only given. The ability of the human visual system to perceive colors as approximately constant irrespective of the illuminant is called color constancy. The output of a sensor varies with the type of illuminant used and is therefore not color constant. Color constancy algorithms try to compute a color constant descriptor from the measured data (M. Ebner, 2007). We show how color constancy can be implemented within JPEG and JPEG2000 by an adaptation of the well-known Retinex algorithm (E.H. Land and J.J. McCann, 1971), (E.H. Land, 1980). Compared to the normal decoding processes only little additional overhead is introduced into the processing pipeline.