Improving Color Reproduction Characteristics of Industrial Television Color Cameras

Abstract

We report methods of improving the color reproduction characteristics of industrial television (ITV) color cameras. Since ITV color cameras are used in a much wider range of situations and lighting conditions than home-use camcorders, it is difficult for them to automatically adapt their color reproduction characteristics according to the color rendering properties of the sources. Thus they have poor color reproduction with low-color light sources. We have extended the light range of color temperature variation of TTL auto-white-balance and achieved automatic color correction according to the kind of light source detected by using the ratio of RGB signals. These methods solve the problem and give good color reproduction regardless of the type of light source.