Color Silicon Retina System with Color Constancy

Abstract

We describe a color silicon retina system that has robust color detection regardless of changes in illumination color. The present model for color constancy is based on Land's retinex theory. In our model, an input image is divided into red, green, and blue channels, and received by silicon retinas that have a logarithmic response. In each channel, the received image is filtered with a Laplacian-Gaussian spatial filter. Opposite color responses, namely red-green and yellow-blue, are then calculated. We verified the color constancy of the proposed system with a simulation.