Research on freehand drawing environments to support creative activities

本研究的目的是支持在创造性活动的较高阶段使用电脑绘制图表。我们的目标是开发一个具有以下功能的交互系统，以实现对计算机的功能支持，并考虑到感觉和印象方面。(1)刀具的主要加工对象是具有逻辑结构的图形。(2)工具提供手绘界面。(3)该工具保持了手工绘制的感觉和模糊性。(4)工具支持智力和主动绘图。我们开发了徒手绘画环境和创造性活动支持环境的基本技术。此外，我们还将应用程序作为徒手绘图环境进行开发。我们认为回顾对于创造性的活动是很重要的，所以我们考虑了图表的逻辑结构与历史数据的操作，然后开发了这样的操作工具。我们还认为，计算机提供灵活的输入界面作为手写输入界面是很重要的。因此，我们开发了一个记事本工具，它以徒手笔画作为输入数据和手势命令。此外，我们还开发了一种安装了加速度计的触控笔，因为使用普通的触控笔并不容易，而普通的触控笔是一种用于手绘的输入设备。新型触控笔使我们能够用手在空中的动作与电脑进行交互。作为一些基础技术的应用程序，我们开发了一个电子白板系统。在教室里写黑板是创作活动的重要场景之一，我们开发了一个支持重复使用黑板的环境。

The purpose of this research is to support, drawing diagrams in the upper stages of creative activities by using computers. We aimed at developing an interactive system with the following features to realize both functional support with the computer and consideration to the aspect of the feelings and impressions. (1) The main processing objects of the tool are diagrams with logical structures. (2) The tool provides a freehand sketching interface. (3) The tool maintains the feel and ambiguity of drawing done by hand. (4) The tool supports drawing intellectually and actively. We developed fundamental techniques for freehand drawing environments and creative activity supporting environments. Furthermore, we performed the development of the application program as a freehand drawing environment. We thought that looking back was important on creative activities, so we considered operations of logical structures of diagrams with historical data, and then developed a tool with such the operations. We also thought that it was important that computers offered flexible input interface as a freehand input interface. Therefore we developed a note pad tool which took freehand strokes as input data and gesture commands. Furthermore, we developed a stylus installed accelerometers because it is not necessarily easy to use the ordinal stylus which spread as an input device for freehand drawings. The new style of stylus enables us to use hand motions in the air for interactions with computers. As an application program of some fundamental techniques we developed an electronic whiteboard system. Writing on the blackboard in the classroom is one of the important scenes of creative activities, We developed an environment that supported reuse of writing on the blackboard.