1. Lightness and Retinex Theory
2. E. H. Land and J. J. McCann, “Method and system for reproduction based on significant visual boundaries of original subject,” U.S. Patent No. 3,553,360 (1971).
3. E. H. Land, L. A. Ferrari, S. Kagen, and J. J. McCann, “Image processing system which detects subject by sensing intensity ratios,” U.S. Patent No. 3,651,252 (1972).
4. The Retinex Theory of Color Vision
5. J. Frankle and J. J. McCann, “Method and apparatus for lightness imaging,” U.S. Patent No. 4,384,336 (1983).