Artificial mosaics

Art often provides valuable insight that can be applied to technological innovations, especially in the fields of image processing and computer graphics. In this paper we present a method to transform a raster input image into a good-quality mosaic: an “artificial mosaic.” The creation of mosaics of artistic quality is challenging because the tiles that compose a mosaic, typically small polygons, must be packed tightly and yet must follow and emphasize orientations chosen by the artist. The proposed method can reproduce the colors of the original image and emphasize relevant boundaries by placing tiles along edge directions. No user intervention is needed to detect the boundaries: they are automatically detected using a simple but effective image processing technique. Several examples reported in the paper show how the right mixture of mathematical tools together with time-tested ideas of mosaicists may lead to impressive results.     

Applying CIM technology to image factories

Image processing allows the automation of the business transaction, turning “paper factories” into “image factories.” This burgeoning new area of computerization needs new paradigms, theories, and methods to maximize its effectiveness at cutting time and costs. This paper investigates what this new area of computerization can gain from CIM technology. It examines the similarities between the processing of computer images in a paperless business environment and the processing of materials into products in the manufacturing plant. These similarities will allow us to apply mature, well-tested CIM techniques to emerging image factories.     

Group technology applications in manufacturing operations through the computer system

The typical manufacturing facility is constantly developing new product designs and related manufacturing processes. The increased volume of new designs and processes causes rapid and inefficient construction of product designs and manufacturing processes. Many parts and manufacturing processes are developed over the life cycle of a production facility with no organized means of cataloging this past and present data. This procedure is extremely ineffective because there is no way to determine if a part or process has been previously developed. The constant “reinventing of the wheel” creates a tremendous waste of manpower and cost.

One approach to solving this problem is through the use of group technoogy. Group technology is the identification and grouping of similar parts and processes in order to take avantage of their similarities in the design and manufacturing process. Parts and processes can be grouped under a classification and implemented with a coding system. Concurrently, the number of parts and processes can be reduced by putting them in a “family.” This “family” has common characteristics such as shape, size, color, tolerance or production operations.

For handling and manipulation of this data, a computer system has been developed. The computer system would set up a reporting format that would classify, code and group the parts and processes, so the user can analyze if a previously designed process or part can be used in the current system and/or if a better layout can be feasible.

Many advantages such as reduced inventory cost, increased facility space and better utilization of manpower are but a few of the benefits from this system.     

An Effective Coalgebraic Bisimulation Proof Method

The bisimulation “up-to-…” technique provides an effective way to relieve the amount of work in proving bisimilarity of two processes. This paper develops a fresh and direct approach to generalize this set-theoretic “up-to-...” principle to the setting of coalgebra theory. The notion of consistent function is introduced, as a generalization of Sangiorgi's sound function. Then, in order to prove that there are only bisimilar pairs in a relation, it is sufficient to find a morphism from it to the “lifting” of its image under some consistent function. One example is given showing that every self-bisimulation in normed BPA is just such a relation. What's more, we investigate the connection between span-bisimulation and ref-bisimulation. As a result, λ-bisimulation turns out to be covered by our new principle.     

基于平面阵列电极传感器的ECT系统设计

设计了基于平面阵列电极传感器的电容层析成像(ECT)系统.由平面阵列电极传感器ECT系统和计算机成像界面组成,采用电容的边缘效应测量原理,对复合材料的损伤、缺陷进行检测.结果表明:在介电常数ε=3.5的玻璃块材料为被测对象的条件下,得到的ECT图像分辨率高、伪影少.由此表明:该系统是一种简单有效、图像重建效果优良的无损检测(NDT)系统.     

Finite-element technique for solving problems formulated by Hamilton''s principle

The finite element technique is applied to functional which govern dynamical problems, where time is an independent variable.

The present paper demonstrates improved accuracy in mass-spring-damper systems and exemplifies “rendevous problems” of a “travelling” particle in a medium. The motion is governed by Hamilton's principle. The time interval is fixed.

Functionals are constructed from Hamilton's extended principle and appropriate conditions stating the various constraints.

Initial value problems may be incorporated by writing a functional in accordance with Gurtin's method.

Shape functions are polynomials in time and can be extended to other spatial variables when present.

As a result of a variation to the functional, a system of algebraic (not necessarily linear) equations is formed. This system is solved simultaneously to yield its motion within the boundaries of the given time interval.     

零件几何参数的计算机测量系统

介绍了一种利用视频测量、计算机图像处理技术实现的零件几何参数测量系统。该系统具有较高的测量效率 ,能够达到较高的测量精度。阐述了系统组成原理、图像处理算法以及影响系统测量精度的主要原因     

基于红外技术的火情预警报警及定位方案研究

随着经济的高速发展,露天堆积场、大型仓库和超高压输电线经过的森林区域等越来越多,这对火灾的防控工作提出了更高的要求.提出了一种基于红外技术和无线电测向原理的火灾预警报警系统设计方案.本火灾探测系统能够扫描半径5 km的区域,并在后台生成一幅全景灰度图像,如探测到火灾,前端将通过无线通信方式发送至后台客户端,并在后台客户端的灰度图像和电子地图分别标注出起火点的位置.黑白全景的电子信息地图中像素点的红外数据是通过下位机光信号采集模块完成的,像素点的坐标信息是通过主轴步进电机的脉冲计数、转镜的旋转角度来确定的.电子地图上的火情点是借助无线电测向思想根据两个探测设备的主轴步进电机的转角信息确定的.所提出的方案具有部署方便、无需聚焦、镜头成本较低、受天气环境影响小、提醒及时等优点.     

基于BP人工神经网络的图像压缩技术过程及分析

本文介绍了BP人工神经网络在计算机图像压缩中应用的原理,对其实现的过程进行了详细的阐述,并通过采用非线性网络和最速下降法实现了图像压缩。分析结果表明:可以通过牺牲压缩率,增加隐含层的神经元数来提高重建图像的质量。     

血液综合信息管理系统(BIMIS)设计和实现

本文从血液综合信息管理系统（BIMIS）开发的实际出发，详细论述了BIMIS设计的原则，思想、方法以及BIMIS实现的主要功能，介绍了字符识别、电子影像档案，指纹识别、二维码等关键技术在BIMIS中的应用，BIMIS实现了对血站整个业务的计算机管理、使血站在管理流程上统一、简便、高效。     

Some approaches to integration

The integration of CAD and CAM is one of the weightiest of the so far unsolved (or only partially solved) problems that are proving to be grave obstacles to the computer-integrated manufacturing systems that we have all envisaged over a number of years. There are two main reasons for this. One is the failure to apply a design methodology conducive to integration; the other is the lack of a clearly suitable principle around which the integration should take place. The lack of a methodical, overall system design directed towards integration from the outset is due not so much to the absence of suitable methodologies (in fact, quite a few have been developed), as to their failure to gain acceptance in industrial practice.

As regards the integrative principle that can provide the core around which a CAD/CAM system can be built, opinions differ widely. One fashionable trend considers geometric modellingto be the “all-saving” principle. Others allot this role to process planning, family-of-parts classification, databases and their management, distributed systems architectures and their implementations. Following their various traditions, various countries are pursuing different courses based on these and other principles.

It is apparent (and appreciated by all the countries concerned) that none of the methods that they have separately or jointly developed is as yet suitable for the fool-proof design and implementation of the “factory of the future”. However, they all have something to offer and have allowed spectacular progress to be made. There is widespread agreement that it is only the synthesis of the extent approaches, the deepening of our theoretical understanding, and above all the acquisition and sharing of much practical experience that can lead to a usable “science” of integration.     

基于单片机的数码监控装置

摘要主要介绍了基于CMOS图像传感器(0V7620),闪速存储器和单片机AT89C51以及U盘控制芯片SL811HS的简易数码监控设备.介绍了USB总线和CMOS图像传感器的概况,并且分别详细讨论了USB接口芯片PDIUSBD12和CMOS图像传感器0V7620基本原理和使用方法.设计了适于高速图像采集的硬件系统,并编写了相应的软件,实现了800×600图像的实时传输和显示.整个系统由单片机控制,监控的结果以图像数据的形式存储在闪速存储器中,图像数据还可以通过USB接口传送到计算机中.     

MIPAS: A neural network-based multimedia information processing and analysis system

This paper presents the structure and design criteria of a neural network-based multimedia information processing and analysis system (MIPAS) which can be used to deal with more-complicated intelligence issues. According to the structure and design criteria, a software environment (SEMIPAS), which supports the implementation of multimedia information (image + speech, image + characters, speech + characters, image + speech + characters) processing and analysis applications, is implemented and introduced. Under this software environment, a multimedia information processing and analysis system called “To Know the World” is constructed. Experiments show that the multimedia information processing and analysis is much more powerful and effective than single-medium information processing and analysis.     

The basic concepts for ISO/IEC's Image Interchange Format (IIF)

This paper describes the basic concepts for the Image Interchange Format (IIF) for the first International Image Processing and Interchange Standard (IPI), which is under elaboration by ISO/IEC JTC1/SC24 (International Standards Organization/International Electronics Commission, Joint Technical Committee, Computer Graphics)—i.e., “information processing”/“computer graphics”—committee work. Starting with a discussion of existing image formats and current image interchange practices, this study outlines the need for a new approach to a general image interchange format. A requirements list and corresponding design goals for the IIF are presented. Finally, the relation to the other parts of the IPI standard are described. The authors are coworkers and contributors to the relevant committees within the ISO/IEC and the DIN German Institute for Standardization (DIN Deutsches Institut für Normung).     

Interactive relevance feedback mechanism for image retrieval using rough set

Recently, how to express human perception has become one of the most active research topics in image retrieval. In this paper, we propose a relevance feedback mechanism that can express objectively human perception by using rough set theory in retrieval system. The mechanism makes full use of the inherent advantages of rough set to solve the difficulty that the retrieval system cannot express human perception. In the end, an image retrieval system – “Basestar”, which is based on the technology, is introduced to illustrate the retrieval performance.     

Developing a generic FMS for small to medium size industries of Korea

This article reports on the development of a generic FMS that is suitable for small to medium size industries. It introduces FMS construction tool named “shell”, system building methodology using it. Also, it outlines the overview of the developed FMS(KUFMS) and its computer control system. Furthermore, it elaborates on the intercommunication device that links the machinery to its control computer. The factors considered in the development of KUFMS are low implementation cost, easy implementation, case of expandability, simple modification capability.