In most motion editing approaches, the users often make changes on mocap data by specifying numerical parameters. However, it is not intuitive for a novice to edit motion sequences in motion planning tasks. In this paper, we present a method of notation-based motion editing, in which Labanotation

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.

随着数字媒体处理、非真实感绘制和交互式娱乐等技术的兴起，出现了一些新的计算机辅助美术动画设计和制作方法。从研究方法和技术路线上，可将当前的研究工作总结和归纳为4类：基于视频流的方法、结合二维半/三维几何模型的方法、基于素材重用的方法和借鉴三维动画技术的方法。在此基础上，对各类方法的基本思想和关键技术等进行了分析，并探讨了如何进一步超越二维世界，如结合三维几何、运动的时序变化、情感等来研究计算机辅助美术动画技术的趋势。

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

In this paper we discuss how to reconstruct 3D models from multi-view engineering draws by employing human engineers' approaches. Human's 'divide and conquer' interpretation strategy in visual cognition is simulated, and successfully carried out on the basis of spatial division of 3D object space. At first, a volume-oriented method is utilized to decompose the 3D object space in a set of 3D 'cell-boxes' whose three-view bounding rectangles will isolate its related sub-projections from input projections views, and in every cell-box a cell primitive is implied. Then, a 3D model of each cell primitive is 'locally' generated from its 'sub-projection' views by wire-frame oriented algorithms. The final interpretation result of the overall projection-views is a 'Union' of these cell primitives. To deal with the ambiguity, a visual reasoning engine is implemented on the basis of principles from Gestalt psychology. It will be activated to pick out the most reasonable interpretation, when ambiguities are generated during the reconstruction process. The section views are also incorporated in getting rid of the ambiguity. Moreover, we design a natural and convenient interaction way to encourage the user to be involved in the process while interpreting complex projections. The key steps of this human-like reconstruction approach are presented in detail-2002 Elsevier Science Ltd. All rights reserved.

In this paper, we present a human-like nonphotorealistic rendering approach. A typical pi-ocess of how human engineers learn to paint technical illirsfration is as follows: At first 1he.v are trained on how to paint separate primitives such as cubes and spheres, and accordingly acciimirlate the empirical drawing principles arid skills during their continuous practices, and finally they can fieely express complicated shapes and engineering information in their illustrations by composing the related primitives' drawings. We manage to mimic this human-like approach by embedding established illirstration rules into prirnitives' lighting models and its drawing algorithms. and implement it in an illustration system-RE TOUCH.

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。

基于人的理解过程和方法，文中提出了工程视图理解的新算法框架。它允许用户参与到理解过程中，在出现歧义时，根据人的视觉认知规律进行“猜测”和“理解”，可得到与人的理解结果更为一致的解，并允许加入剖视图的处理。该文着重介绍该方法的算法思想，以及基元的划分与生成、剖视图处理、视觉推理等关键算法步骤。

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。