抄録
We have developed a hybrid writing and erasure system called Hand-rewriting in which both human users and computer systems can write and erase freely on the same piece of paper. When the user writes on a piece of paper with a pen, for example, the computer system can erase what is written on the paper, and additional content can be written on the paper in natural print-like colors. We achieved this hybrid writing and erasure on paper by localized heating combined with handwriting with thermochromic ink and localized ultraviolet-light exposure on paper coated with photochromic material. This paper describes our research motivation, design, and implementation of this interface and examples of applications.