一种便携式故障检测系统的设计

供输弹机是武器上易发生故障的子系统,以往的故障检测设备体积庞大。针对这一问题,以某型火炮的供输弹机为对象,结合数据采集的思想,提出了一种基于嵌入式PC104控制总线的便携式故障检测系统。论述了该系统的工作原理,硬件设计,并阐述了基于Visual C++开发工具的系统软件实现。试验表明,该检测系统在保证供输弹机运转的同时,能够快速检测弹丸输送中的多路信号,为准确定位供输弹机的故障,提供了有效的解决方案。     

可见光-热红外视频运动目标融合检测的研究进展及展望

在智能视频监视领域,协同利用可见光和热红外传感器,使全天时、精确、鲁棒的智能监视成为可能,具有显著的优势.对可见光-热红外运动目标融合检测的研究进展进行分析和总结.首先,分析了多源传感器融合检测问题,着重说明了融合检测的显著优势、关键步骤及已有公开测试数据集等;然后,详细分析了该类算法的研究进展,从融合策略、运动检测策...     

Multiple kernel-based multi-instance learning algorithm for image classification

In this paper, a novel multi-instance learning (MIL) algorithm based on multiple-kernels (MK) framework has been proposed for image classification. This newly developed algorithm defines each image as a bag, and the low-level visual features extracted from its segmented regions as instances. This algorithm is started from constructing a “word-space” from instances based on a collection of “visual-words” generated by affinity propagation (AP) clustering method. After calculating the distance between a “visual-word” and the bag (image), a nonlinear mapping mechanism is introduced for registering each bag as a coordinate point in the “word-space”. In this case, the MIL problem is transformed into a standard supervised learning problem, which allows multiple-kernels support vector machine (MKSVM) classifiers to be trained for the image categorization. Compared with many popular MIL algorithms, the proposed method, named as MKSVM-MIL, shows its satisfactorily experimental results on the COREL dataset, which highlights the robustness and effectiveness for image classification applications.     

Multi-factor cheating prevention in visual secret sharing by hybrid codebooks

Visual secret sharing, or the so-called visual cryptography, is a well-known scheme that encrypts a secret image into several meaningless share images, usually printed on transparencies, and decrypts as stacking some or all share images by the human visual system. More and more researches about visual secret sharing and its applications have been recently proposed. Unfortunately, the cheating attack in which malicious participants cheat the honest one(s) by forging a fake share image has existed. Since 2006, some cheating prevention schemes have been proposed but suffered from one or more disadvantages as follows: (1) maintaining extra share images used to verify the integrity of a share image prior to stacking, (2) introducing extra pixel expansion, (3) raising heavy computation cost, and (4) giving ambiguous cheating detection. In this paper, a multi-factor cheating–preventing scheme, aiming at exploiting the hybrid codebook to hide the additional verification images into the share images, has been proposed without suffering the above-mentioned deficiencies. Two-factor cheating–detection exploits the design of verification to both share images and stacked results to deter attackers’ cheating. The experimental results demonstrate the proposed scheme is feasible.     

基于PXI总线的自动测试系统设计

针对电子设备的测试需求、系统开放性和可扩展的要求,开发了一种基于PXI总线的自动测试系统。详细说明了此系统的硬件构成和软件设计方法。该系统以PXI内嵌主控计算机为核心,以LabVIEW软件为开发环境,并综合运用标准接口和总线技术来实现系统的综合设计。系统具有良好的人机交互界面,在使用过程中运行稳定可靠、测试效率高、使用维护方便。     

基于OpenGL的水下云台可视化实现

用于控制声纳姿态的水下云台在实际应用中需要实现可视化。将设计云台的Pro/E模型保存为STL标准三维图形文件格式,利用3D Explore软件将该STL文件转换为标准数组。通过Visual C++结合Open GL编程技术,实现了水下云台的可视化,对准确控制云台提供了帮助。     

SS*:一种嵌入视觉特性的多维图像索引算法

图像检索因信息量巨大，查询速度至关重要。一种有效的方法是对图像特征进行多维索引，然后按多维索引算法检索。但是，现有的多维索引算法并不是专门针对图像数据库设计的，没有考虑图像的视觉特性，检索性能不理想。文章针对图像信息的特点，结合SS多维索引算法，设计了一种新的基于内容的图像检索的多维索引算法——SS^*算法。实验表明，该算法对图像检索是有效的。     

网络型Visual Basic程序设计语言课件的设计与实现

Visual Basic程序设计语言是一门面向对象的程序设计语言，相对简单，适合面向对象语言的初学者，但是他的应用面相当广泛，既可以进行程序设计，又可以和数据库连接，进行数据处理。目前这方面的课件大多设计不够精良，视觉枯燥；拓展功能不够丰富，缺乏相关例题与练习；与用户的沟通交流比较少，甚至没有在线讨论、搜索服务等功能。而本文介绍的网络型Visual Basic程序设计语言课件在这些方面具有独到之处，在此介绍了该课件制作的总体思路，重点介绍了用Dreamweaver与Photoshop配合进行界面设计的方法与技巧，同时详细介绍了本套课件区别于其他同类型软件的技术的实现过程。     

用Visual Basic开发个性化图形界面的技术及其实现

Visual Bhsic(VB)是开发Windows环境下图形化应用程序的良好工具，其易学易用已为广大编程爱好者公认。可是VB开发的图形界面中规中矩，已不能满足日益张显个性的要求，就此本文以时钟程序为例，介绍如何用VB开发具有通明效果的不规则图形界面应用程序的关键技术。     

电视频道包装的核心内涵和品牌建设

通过对电视频道整体包装和品牌建设的关系再认识,具体分析了电视频道包装系统的核心内涵,从理念识别系统、视觉识别系统、行为识别系统入手,详细阐述了建立频道形象包装识别系统,打造优势品牌的具体内容,并指出电视品牌时代频道包装的个性化、人文化、内在化、规范化和时尚化的发展趋势.