Semi-automatic Manga Colorization Using Flat ColoredImages

Abstract

To create color comics, manual colorization process is required, which incurs high labor costs. Tosolvetheproblem, we previously proposed a semi-automatic colorization method by inputting a pair of a screen-tones imageandaflat-colored image. Although this approach can reduce the cost, it still requires manual preparation of flat-colored images. Thus,in this paper, we propose a method to automatically create screen-tones images and flat-colored images fromcolor illustrationson the Internet. Experiments show that the colorization network can be adequately trained with the dataset automaticallycreated by the proposed method although the colorization accuracy is slightly lower than that of manually preparedtrainingdata.