本文的目的就是研究如何应用FPGA这种大规模的可编程逻辑器件实现CCD（Charge coupled Device，电荷耦合器件）数字图像的实时采集及预处理。基于对实时图像处理系统的研究与设计，本文主要研究工作及成果如下： 1.本论文详细的介绍了图像采集卡的结构和基本工作原理。同时，针对高分辨率的CCD摄像机，探讨了有关点目标与CCD像元一一对应的图像采集及其硬件和软件设计方法。 2.本文分析了星图中弱小目标、噪声以及背景的特点，给出了点目标的场景图像的数学模型及复杂背景下点目标检测的预处理方法。针对星图灰度分布的特点，采用高斯低通滤波算法和高通滤波算法对星图进行预处理，同时还对图像扫描聚类算法进行了研究与分析。 3.数字信号处理器常常因为在复杂性、运算速度等方面的限制，难以实时的实现复杂的检测算法。本文采用FPGA技术，实现了复杂背景下弱点目标的预处理算法，解决了计算、数据缓冲和存储操作协调一致的问题，同时采用并行高密度加法器和流水线的工作方式，使整个系统的数据交换和处理速度得以很大的提高，合理的解决了资源和速度之间的相互制约问题，并在实际中取得满意的结果。
上传时间： 2013-07-03
上传用户：wang5829
摘要：本水位监测报警器使用5V低压直流电源（也可以用3节5号电池代替）就可以对5~15厘米的水位进行监测，用LED显示和数码管显示水位，并可以对不再此范围内的水位发出报警。主要采用CD4066、74LS86、74LS32、CD4511芯片，再加上数码管、蜂鸣器、发光二极管、电阻这些器件组成一个简单而灵敏的监测报警电路，操作简单，接通电源即可工作。因为大部分电路采用数字电路，所以本水位监测报警器还具有耗能低、准确性高的特点。关键字：译码电路 报警电路 监测电路 Abstract: The water level alarm monitoring the use of 5 V low-voltage DC power (can also use three batteries replaced on the 5th) will be able to 5 to 15 centimeters of water level monitoring, with LED display and digital display of water level, and this can no longer Within the scope of a water level alarm. Mainly CD4066, 74LS86, 74LS32, CD4511 chips, coupled with digital control, buzzer, light-emitting diode, the resistance of these devices composed of a simple and sensitive monitoring alarm circuits. Because the majority of circuits using digital circuitry, so the water level monitored alarm system also has low energy consumption, high accuracy of the characteristics. Keyword: Decoding circuit alarm circuit monitoring circuit
上传时间： 2013-11-05
上传用户：王庆才
使用Nios II紧耦合存储器教程 Chapter 1. Using Tightly coupled Memory with the Nios II Processor Reasons for Using Tightly coupled Memory . . . . . . . . . . . . . . . . . . . . . . . 1–1 Tradeoffs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1 Guidelines for Using Tightly coupled Memory . . . .. . . . . . . . 1–2 Hardware Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2 Software Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . 1–3 Locating Functions in Tightly coupled Memory . . . . . . . . . . . . . 1–3 Tightly coupled Memory Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–4 Restrictions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–4 Dual Port Memories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . 1–5 Building a Nios II System with Tightly coupled Memory . . . . . . . . . . . 1–5
上传时间： 2013-10-13
上传用户：黄婷婷思密达
Digital cameras have become increasingly popular over the last few years. Digital imagingtechnology has grown to new markets including cellular phones and PDA devices. With thediverse marketplace, a variety of imaging technology must be available. Imaging technologyhas expanded to include both charge-coupled device (CCD) and CMOS image sensors.
标签： CoolRunner-II XAPP CPLD 390
上传时间： 2013-10-16
上传用户：18710733152
CHMMBOX, version 1.2, Iead Rezek, Oxford University, Feb 2001 Matlab toolbox for max. aposteriori estimation of two chain coupled Hidden Markov Models.
标签： aposteriori University CHMMBOX version
上传时间： 2014-01-23
上传用户：rocwangdp
三维矢量有限元-矩量法电磁场分析程序。 EMAP5 is a full-wave electromagnetic field solver that combines the method of moments (MOM) with a vector finite element method (VFEM). It employs the finite element method (FEM) to analyze a dielectric volume, and employs the method of moments (MoM) to solve for currents on the surface of (or external to) this volume. The two methods are coupled through the fields on the dielectric surface.
标签： electromagnetic full-wave combines solver
上传时间： 2016-04-03
上传用户：cylnpy
RS_latch using vhdl, When using static gates as building blocks, the most fundamental latch is the simple SR latch, where S and R stand for set and reset. It can be constructed from a pair of cross-coupled NOR (Not OR) logic gates. The stored bit is present on the output marked Q. Normally, in storage mode, the S and R inputs are both low, and feedback maintains the Q and Q outputs in a constant state, with Q the complement of Q. If S (Set) is pulsed high while R is held low, then the Q output is forced high, and stays high when S returns to low similarly, if R (Reset) is pulsed high while S is held low, then the Q output is forced low, and stays low when R returns to low.
标签： using fundamental the RS_latch
上传时间： 2017-07-30
上传用户：努力努力再努力
Microprocessors are getting smaller, cheaper and faster. Every day, it is easier to embed more functionality into a smaller space. Embedded processors have become pervasive, and as time goes on, more and more functions that were once implemented with analog circuitry or with electromechanical assemblies are being realized with microcontrollers, ADCs and DACs. Many of these assemblies that are being supplanted by the microprocessor are controlling dynamic processes, which is a good thing, because the microprocessor coupled with the right software is often the superior device.
上传时间： 2016-07-20
上传用户：kunger
Today, electric power transmission systems should face many demanding chal- lenges, which include balancing between reliability, economics, environmental, and other social objectives to optimize the grid assets and satisfy the growing electrical demand. Moreover, the operational environment of transmission systems is becoming increasingly rigorous due to continually evolving functions of interconnected power networks from operation jurisdiction to control responsibly – coupled with the rising demand and expectation for reliability.
标签： Monitoring Protection Wide Area
上传时间： 2020-06-07
上传用户：shancjb
This reference design describes the design of a 3-phase AC induction vector control drive with position encoder coupled to the motor shaft. It is based on Motorola’s DSP56F805 dedicated motor control device. AC induction motors, which contain a cage, are very popular in variable speed drives. They are simple, rugged, inexpensive and available at all power ratings. Progress in the field of power electronics and microelectronics enables the application of induction motors for high-performance drives, where traditionally only DC motors were applied. Thanks to sophisticated control methods, AC induction drives offer the same control capabilities as high performance four-quadrant DC drives.
标签： Reference Designer Manual Phase DRM 023 AC
上传时间： 2020-06-10
上传用户：shancjb
