This paper presents an automatic non-photorealistic rendering approach to generating technical illustration from 3D models. It first decomposes the 3D object into a set of C SG primitives, and then performs the hidden surface removal based on the prioritized list, in which the rendition order of CSG primitives is sorted out by depth. Then, each primitive is illustrated by the pre-defined empirical lighting model, and the system mimics the stroke-drawing by user-specified style. In order to artistically and flexibly modulate the illumination, the empirical lighting model is defined by three major components: parameters & multi-level lighting intensities, parametric spatial occupations for each lighting level, and an interpolation method to calculate the lighting distribution over primitives. The stylized illustration is simulated by a grid-based method, in which we "fill" the desirable pictorial units into the spatial occupation of CSG primitives, instead of "pixel-by-pixel" painting. This region-by-region shading facilitates the simulation of illustration styles.

本文提出了一种用于通侦信息智能化融合系统的多层黑板模型，讨论该模型的体系结构和实现方法，给出几个关键算法和一个应用例子，最后指出该模型对解决各级子黑板之间呈现出层次关系的一类问题具有普适性。

文中主要研究了CAN领域中的表达型绘制技术。针对机械零件的黑白润饰的特点，提出了以表面特性解释为基础的表达型绘制方法，进而系统地研究了基于区域特性来模拟不同表面润饰的各种手法和关键算法，并完成了一个实验系统RETOUCH。

提出一种基于图像的虚拟景观漫游方法。该方法采用全景图和基于图像的动画来建立虚拟环境，用户通过实时图像处理浏览器，可以模拟这两种英武的漫游行为——环绕漫游和贯穿漫游，并且在风景旅游模拟系统（Virtual-Touring）中实现了这种方法。

In this paper we presents our effort towards the goal of perceptual user interface for major interaction tasks, such as navigation/travel, selection/picking and personal data access, in virtual shopping. A set of 3-D navigation devices, vision-based pointing and personal access system are mainly discussed. The motivation and design principles behind these interfaces are also described. A prototype integration solution, which brings these devices together in virtual shopping environment, is given. These interfaces and interaction devices have been implemented and tested for evaluation