Interactive Software Architecture for Advanced Movile Interface

(1)基于笔的几何设计绘图系统：提出了“交互美化”和“预测绘图”两种新颖的交互技术。交互式美化接收用户的自由笔画输入，并通过考虑可能的几何约束生成多个候选笔画。预测绘图根据现有图形之间的空间关系显示下一个绘图操作。然后，我们开发了一个原型系统Pegasus，并实现了快速灵活的绘图交互。(2)基于笔的三维自由曲面设计素描界面：我们开发了一个基于笔的绘图系统“Teddy”，一个用于创建三维多边形曲面模型的素描界面。用户可以通过用笔绘制2D轮廓来创建3D模型。我们的非正式用户研究表明，第一次用户通常在10分钟内掌握操作，并可以在几分钟内构建3D模型。该论文获得了SIGGRAPH'99的影响论文奖。(3)移动计算机上下文感知信息系统：我们提出了一种新的信息系统架构，称为“WEBPAD系统”。WEBPAD试图成为一个通用的上下文感知UI系统，它可以识别和预测当前用户的“上下文”信息。我们的系统采用瘦客户机技术将大部分数据处理工作卸载给服务器。服务器自动从WWW收集有用的信息。用户可以通过摄像头和麦克风创造新的信息，这些信息通过信息过滤技术分发给其他人。(4)多点画输入系统：我们开发了多点画输入系统的原型系统。我们的系统可以识别由用户同时移动的设备的多个动作，因此用户可以在屏幕上指向和操作多个对象。

(1) Pen-Based Drawing System for Geometric Design:We proposed two novel interaction techniques called "interactive beautification" and "predictive drawing." Interactive beautification receives the user's free stroke input and generates multiple candidates by considering possible geometric constraints. Predictive drawing shows next drawing operation based on the spatial relationship among existing figures. We then developed a prototype system Pegasus, and achieved fast and flexible drawing interactions.(2) Pen-Based Sketching Interface for 3D Freeform Design :We developed a pen-based drawing system "Teddy", a sketching interface for creating 3D polygonal surface models. The user can create a 3D model by drawing 2D silhouette with a pen. Our informal user study showed that a first-time user typically masters the operations within 10 minutes, and can construct 3D models within minutes. This papers was awarded Impact Paper at SIGGRAPH'99.(3) Context-aware information system for mobile computer :We proposed a new information system architecture called the "WEBPAD system". WEBPAD is attempts to be a general-purpose context-aware UI system, which recognizes and predicts current user's "context" information. Our system employs thin-client technique to offload much of the data processing to the server. The server collects useful information from the WWW automatically. The user can create new information via a camera and a microphone, and the information is distributed to others via information filtering techniques.(4) Multiple Painting Input System :We developed a prototype system of multiple pointing input system. Our system recognizes multiple movements of devices that is moved by a user simultaneously, so the user can point and manipulate multiple object on the screen.