网络CAI软件中动画过程的设计与实现

针对网络计算机辅助教学的将点和实际开发过程中积累的经验,提出各动画过程的设计思想,并简要给出陈春实现方法,讨论了用Ｊａｖａ的实现的网络教学系统中的尝试、演示关键功能携炔的具体技术。     

机器人插件作业的视觉导引方法研究

插件作业（parts mating）是装配机器人的一项基本作业环节．本文介绍了以双目立体视觉 实现该作业的视觉导引方法．该方法通过采用人机交互方式,借助于人的智慧,提高了图像 特征提取和匹配的准确性和可靠性、可直观准确地给出插件作业的动作参数,克服了自动视 觉计算复杂、鲁棒性差的缺点,适用于机器人遥操作作业．实验表明,基于人机交互的机器 人插件作业在立体视觉导引下是完全可行的．     

Direct Manipulation and Interactive Sculpting of PDE Surfaces

This paper presents an integrated approach and a unified algorithm that combine the benefits of PDE surfaces and powerful physics-based modeling techniques within one single modeling framework, in order to realize the full potential of PDE surfaces. We have developed a novel system that allows direct manipulation and interactive sculpting of PDE surfaces at arbitrary location, hence supporting various interactive techniques beyond the conventional boundary control. Our prototype software affords users to interactively modify point, normal, curvature, and arbitrary region of PDE surfaces in a predictable way. We employ several simple, yet effective numerical techniques including the finite-difference discretization of the PDE surface, the multigrid-like subdivision on the PDE surface, the mass-spring approximation of the elastic PDE surface, etc. to achieve real-time performance. In addition, our dynamic PDE surfaces can also be approximated using standard bivariate B-spline finite elements, which can subsequently be sculpted and deformed directly in real-time subject to intrinsic PDE constraints. Our experiments demonstrate many attractive advantages of our dynamic PDE formulation such as intuitive control, real-time feedback, and usability to the general public.     

Application of the Self-Organizing Feature Map Algorithm in Facial Image Morphing

A new facial image morphing algorithm based on the Kohonen self-organizing feature map (SOM) algorithm is proposed to generate a smooth 2D transformation that reflects anchor point correspondences. Using only a 2D face image and a small number of anchor points, we show that the proposed morphing algorithm provides a powerful mechanism for processing facial expressions.     

计算机生成卡通烟雾动画

给出了一个用于二维计算机动画烟雾的模型,这里着重强调的用计算机生成卡通风格的烟雾效果。首先介绍如休从手工绘制的卡通烟画面中提取烟雾骨架的静态结构与动态,然后沿骨架进行不同的形状绘制来生成卡通烟缕和烟团,引进随机分量控制,该模型可以自动生成无重复机械感的并与卡通风格一致的烟雾序列画面。     

Visual Speech Synthesis by Morphing Visemes

We present MikeTalk, a text-to-audiovisual speech synthesizer which converts input text into an audiovisual speech stream. MikeTalk is built using visemes, which are a small set of images spanning a large range of mouth shapes. The visemes are acquired from a recorded visual corpus of a human subject which is specifically designed to elicit one instantiation of each viseme. Using optical flow methods, correspondence from every viseme to every other viseme is computed automatically. By morphing along this correspondence, a smooth transition between viseme images may be generated. A complete visual utterance is constructed by concatenating viseme transitions. Finally, phoneme and timing information extracted from a text-to-speech synthesizer is exploited to determine which viseme transitions to use, and the rate at which the morphing process should occur. In this manner, we are able to synchronize the visual speech stream with the audio speech stream, and hence give the impression of a photorealistic talking face.     

Fast Lighting Independent Background Subtraction

This paper describes a simple method of fast background subtraction based upon disparity verification that is invariant to arbitrarily rapid run-time changes in illumination. Using two or more cameras, the method requires the off-line construction of disparity fields mapping the primary background images. At runtime, segmentation is performed by checking background image to each of the additional auxiliary color intensity values at corresponding pixels. If more than two cameras are available, more robust segmentation can be achieved and, in particular, the occlusion shadows can be generally eliminated as well. Because the method only assumes fixed background geometry, the technique allows for illumination variation at runtime. Since no disparity search is performed, the algorithm is easily implemented in real-time on conventional hardware.     

动漫产业的象征符号——动漫形象

随着动漫产业的发展,人们将更多的注意力投向了动漫产业及其周边产品的开发,动漫形象作为一种媒介,已经成为动漫业发展中的一种符号,动漫形象能够反映受众心理,完成文化符号向产业符号的转变,象征着一个时代的文化缩影。充分研究和发挥动漫形象的这些符号特征,能够推动动漫业的继续发展。     

浅析建筑三维动画技术

在建筑方案设计阶段和工程完成后,三维动画为筛选、优化设计方案、评估城市景观、协调工程与环境的关系,都创造了有利条件。主要介绍建三维动画的简介,制作过程,及得到的启示,最后介绍了建筑三维动画的优势和广阔发展前景。     

动漫在医学中的应用

动漫可以逼真的呈现现实世界的事物,它已经被广泛地应用于诸多领域,特别是在医学领域。介绍了动漫技术在基础医学、临床医学等方面的应用,并展望了动漫技术在医学中的应用前景。