Conference 5–9 August 2012
Exhibition 7–9 August 2012
Los Angeles Convention Center

Hand-Rewriting: Automatic Rewriting Like Natural Handwriting

Los Angeles Convention Center, Concourse Foyer

Approaches for combining handwriting acts and computer simulation, like the “pen tablet” and the “digital pen”, are gaining acceptance. In contrast to those two approaches, this system automatically performs “rewrite” processing on paper in correspondence with pen-and-paper handwriting.

The Hand-Rewriting system combines two technical innovations:

1. A function that automatically erases specific areas of the paper, without the need to use an eraser, when the user writes letters or draws pictures on the paper. Local erasure on the paper in this manner can express letters and pictures written in thermochromic ink created by laser-generated thermal conversion.

2. A function that can repeatedly display additional related information on the paper, in color, when the user writes letters or sketches pictures on the paper. The local colors on the paper are created by projecting an ultraviolet (UV) pattern from a UV projector onto paper coated with photochromic material (PM).

With those control technologies, three types of interactive applications of the Hand-Rewriting system have been developed:

1. When the user writes something by hand, the system automatically erases parts of the characters, and the effect is to transform the letters into ornamental writing.

3. When the user sketches something by hand, the system automatically colors the interior of the outline sketch, and the effect is to replicate the sketch itself in the manner of a stamp.

3. When the user makes a mistake while writing, the system automatically erases the incorrect part and displays a guide giving the correct entry in color.

With these applications, users can enjoy performing various creative activities by freely using both kinds of control.

Tomoko Hashida
The University of Tokyo

Takeshi Naemura
The University of Tokyo

Kohei Nishimura
The University of Tokyo