© Yukito Kishiro / Shueisha

The widely popular Japanese manga arts is usually presented in B/W. Its intensive use of hatching and screening is a distinctive characteristic, but also imposes many difficulties in its digital colorization. Unlike the previous colorization methods that rely on intensity-continuity. This paper presents a colorization technique that relies on the pattern-continuity as well as the intensity-continuity. Hence it can naturally colorize the pattern-intensive manga.