共查询到20条相似文献,搜索用时 46 毫秒
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研究了一种可以实现图像数据的远距离传输和高速实时存储的技术。该技术以FPGA为逻辑控制单元,通过LVDS接口电路远距离传输采集到的图像数据;利用交叉双平面页编程技术流水线式写FLASH以提高存储速度。用CY7C68013A控制的USB2.0接口上传FLASH中的数据到计算机,最后用上位机软件分析数据。结果表明,该系统稳定可靠地远距离传输并高速存储了图像数据。 相似文献
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在电晕探测系统中,为满足高精度Camera Link接口相机的高实时视频采集、处理需要,同时降低系统成本及复杂度,提出了一种通过DM642的视频端口扩展Camera Link接口的方法.与一般采用FPGA作为处理前端不同,该方法基于视频端口的原始捕获模式,实现了在DM642上的Camera Link的直接扩展.设计了硬件电路及VP口采集驱动程序,并采用高精度(16 bit)紫外相机进行了实时采集.结果表明,该接口可以满足采用Camera Link接口的紫外相机实时采集需求.基于该接口的高速数字图像处理系统已用于紫外探测系统信息处理中. 相似文献
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介绍了一种基于碲镉汞红外短波相机的图像实时采集与显示系统。以基于
碲镉汞短波红外探测器以及FPGA+DSP硬件结构,且具有手动调焦、调节积分时间和增减衰减
片等多种功能的红外短波凝视相机作为采集系统的基础,以Camera Link接口连接线作为传输通道,采
用兼容PCI Express x4总线的采集卡实现了红外图像的实时快速采集和显示。实验中,设计了图
像采集与显示界面,以实现对相机的实时控制和对采集图像的调整;设计了一种图像回放软件,以完成
存储图像检验和后期图像处理等工作。实验结果证明,该系统的性能稳定可靠,实时采集、传输和存
储功能完备准确,因此具有很高的工程实用价值。 相似文献
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基于EZ-USB FX2系列USB(通用串行总线)单片机中的GPIF(通用可编程接口)功能和USB2.0接口功能,模拟EPP(扩展并行端口)的全部读写时序,使得PC能够通过USB接口与EPP接口设备进行通信.方案中通过PC上的驱动程序和转换板上固件程序实现了USB接口的控制、中断、批量3种传输方式,通过使用Cypress公司提供的GPIF Designer工具开发GPIF,预先定义好波形描述符,在程序执行过程中通过激发GPIF功能来模拟EPP的数据读写、地址读写时序,完成USB协议与EPP协议的双向转换.此方案硬件实现简单,具有可靠性高、传输速度快、占用CPU及内存资源少等特点,是扩展PC上EPP接口的良好选择. 相似文献
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Real-Time Edge Follow: A Real-Time Path Search Approach 总被引:1,自引:0,他引:1
Undeger C. Polat F. 《IEEE transactions on systems, man and cybernetics. Part C, Applications and reviews》2007,37(5):860-872
Real-time path search is the problem of searching a path from a starting point to a goal point in real-time. In dynamic and partially observable environments, agents need to observe the environment to track changes, explore to learn unknowns, and search suitable routes to reach the goal rapidly. These tasks frequently require real-time search. In this paper, we address the problem of real-time path search for grid-type environments; we propose an effective heuristic method, namely a real-time edge follow alternative reduction method (RTEF-ARM), which makes use of perceptual information in a real-time search. We developed several heuristics powered by the proposed method. Finally, we generated various grids (random-, maze-, and U-type), and compared our proposal with real-time A*, and its extended version real-time A* with n-look-ahead depth; we obtained very significant improvements in the solution quality. 相似文献
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This paper reviews our recent efforts in the design and implementation of real-time speech coders. We discuss our approach and methodology for real-time hardware for coder techniques ranging from low to high complexity. Examples of realizations are given for each approach. They include adaptive differential PCM coding, subband coding, harmonic scaling with subband coding, and adaptive transform coding. Low to medium complexity techniques are based on the use of the Bell Laboratories digital signal processing (DSP) integrated circuit. High complexity block processing techniques are based on the use of an array processing computer. We conclude with an assessment of the performance versus complexity tradeoffs involved in these coding methods. 相似文献
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Cugnal Integrated Products Inc 《电子质量》2001,(11):69-71
当系统时钟使用高频内置振荡器时,辅助振荡器可用来驱动石英作实时时钟(RTC)。系统时钟信号可取自内置和辅助振荡器,改变RTC信号源时不会降低其精度,RTC使用定时器2,它是为给辅助输入信号下降沿计数而设置的。CPO用来把石英振荡波形转换成方波。 相似文献
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本文根据STD总线控制系统的要求和环境,以RAM的故障模型为基础,提出了基于时间控制及模块的系统故是实时检测设计,重点研究了暂时故障的处理问题。由各模块检测算法构成的检测任务灵活方便,实用性强,能处理文中提出的所有故障。 相似文献
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Adaptive Real-Time Wavelet Detection 总被引:1,自引:0,他引:1
Detection of wavelets in noisy signals is important for many biomedical as well as other applications. An adaptive wavelet detection system is described, based on the cross correlation method. The method is restricted to fnite-length, nonoverlapping wavelets. A random reference correlator (RRC) circuit is used to estimate the correlation between signal and template, eliminating the need for expensive hardware or time-consuming software correlation calculations. 相似文献
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Joel Woodward 《电子产品世界》2006,(6):73-74
高速数字产品的设计者们面临着测试方面令人生畏的挑战.设计团队必须在严格的项目进度和有限的预算下设计出全新的功能和实现前所未有的品质.于是,FPGA正发挥着越来越重要的作用.ASIC的开发本身更为缓慢,仿真是其中心任务,保证ASIC第一次就能正常工作显得非常关键;快速的FPGA则与之不同,其开发以反复的系统内测试为中心.设计团队若使FPGA设计具有可测性的话,则可以削减数周、甚至数月的开发时间. 相似文献