Colorization for monochrome image based on diffuse-only reflection model

This paper proposes a new algorithm for coloring a monochrome image. Recently, a few effective colorization algorithms have been proposed. Those algorithms can colorize monochrome images by given some color hint, and they work well as an intuitive impression. However, a realistic colorization was difficult by those algorithms, because they have not used any physical model. This paper focuses on the dichromatic reflection model and tries to colorize monochrome images by considering diffuse-only reflection components. We demonstrate that high quality colorizations of still images may be obtained from a small number of color seeds given by a user.