基于DSP技术的边缘检测实现

提出了基于提升小波变换的边缘检测方法,并通过DSP硬件平台实现.此算法没有采用传统的提升算法中的下采样方法,而是利用algorithme a trous算法.虽然计算量有所增加,但简化了边缘检测的算法,易于编程实现和实际应用;基于DSP硬件平台的实现克服了传统方法的缺点,很好地满足了实时性的要求.实验表明,该方法具有运算速度快、易于编程实现、效果好等优点,是一种适于实际应用的方法.     

自适应OSTU算法在舰船边缘检测中的应用及其FPGA实现

针对舰船边缘信息检测实时性差、检测效果不佳等问题,通过选取适用于舰船边缘检测的数学形态运算与最大类间方差二值法的方法,并结合 FPGA并行处理能力,构建舰船边缘检测硬件平台。在该硬件平台上,采用FPGA对舰船目标相关算法进行硬件实现。从舰船图像处理结果分析可知,采用传统CPU进行算法处理需要约120ms,采用FPGA实现仅需21.2ms,采用FPGA加速后处理速度提高5倍以上,完全可满足实时性要求,因此该方法具有良好的应用前景。     

基于DSP的数字视频处理系统中边缘检测算法的实现

近年来,随着DSP技术的快速发展,数字视频处理技术得到了越来越广泛的应用。边缘检测是是数字视频处理中的一项关键技术,而且是进行对象检测和识别的基础。首先分析了当前发展比较成熟的几种边缘检测算法,然后针对基于DSP的数字视频处理系统的特点选用Canny边缘检测算法,并在基于DM642的数字视频处理系统上实现,给出了仿真的结果。     

改进的基于模糊集的边缘检测算法

传统的边缘检测方法对模糊边缘图像不敏感。改进了模糊边缘检测算法,用min-max重心法模糊推理该点的边缘隶属度,实现边缘检测。给出了应用本算法边缘检测的实例,并与传统的边缘检测算法进行了比较。结果表明,本算法比传统算法边缘检测效果好。     

基于亚像素精度的锯齿角度测量

随着图像处理精度的要求不断提高,传统的像素级图像边缘检测算法难以满足要求。因此,需要采用精度更高的亚像素级边缘检测算法。为了提高锯齿测量精度,采用一种基于亚像素精度锯齿轮廓提取算法,并且结合最小二乘法直线拟合算法拟合锯齿边界,选用MicrosoftVisualStudio2008编程环境,采用Ｃ++语言编程实现锯片的锯齿角度测量。实验结果表明,该测量方法得到的锯齿角度具有较高测量精度。     

一种改进的三边定位算法

RFID无线定位技术因系统易于实现、硬件成本低等优点,已被广泛应用于各种室内定位领域.在RFID定位算法中,三边定位算法因其算法简单、易于编程实现,因此在实际定位问题中被广泛采用,但是传统的三边定位算法受环境中的不确定因素影响较大,定位精度较低,因此本文提出一种基于相交法的三边定位改进算法,在一定程度上提高了定位精度.实验结果验证了本文算法的可行性及优越性.     

基于DSP的人脸识别系统的设计与实现

为了提高身份识别系统的实时性、可靠性和便捷性,设计了基于DSP的人脸识别系统。基于肤色的人脸检测算法和基于小波变换的主成分分析的人脸识别算法构成了所设计系统的软件算法;DSP(DM642)微处理器、CCD传感器摄像头和显示屏等构成了该系统的硬件平台。测试结果表明,设计的人脸识别系统具有识别速度快和成功率高等优点。     

基于无效器件原理的逆变器死区补偿方法

PWM逆变器死区的存在对异步电动机变频调速系统的动态、静态性能及稳定性均产生了许多负面影响。针对DSP控制的电压源型PWM逆变器,文中提出一种基于无效器件原理的死区补偿方法,利用DSP检测定子电流,通过软件编程只给有效器件送驱动信号,达到补偿的目的,具有外接电路简单,成本低,易于实现等特点,数字仿真结果证实了其补偿效果。     

基于Freeman链码二维图像轮廓的提取与匹配

在边缘检测技术的基础上,利用Freeman链码的性质实现了二维图像轮廓的提取;并运用动态规划编程,提出了一种新的图像轮廓匹配算法。结果表明,该算法比传统的图像轮廓匹配算法更简洁有效。     

基于用户的协同过滤推荐算法MapReduce并行化实现

基于用户的协同过滤推荐算法是应用范围广且应用效果较好的推荐算法之一。传统单机模式下运行的基于用户的协同过滤推荐算法在面对海量数据时存在严重的性能瓶颈问题,很难满足实际计算需求,而基于MapReduce的并行计算框架为解决该问题提供了新思路。MapReduce是Hadoop开源框架的核心计算编程模型, MapReduce的设计目标是方便编程人员在不熟悉分布式并行编程的情况下,可将自己的程序运行在分布式系统上。根据基于用户的协同过滤推荐算法特点,提出MapReduce并行化实现方法。实验结果表明,在MapReduce并行计算框架下实现的基于用户的协同过滤推荐算法在算法性能及稳定性方面都取得了理想效果。     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

胡主席在印度,我却在中国

Today, Sunday morning, I sit thinking and typing at my computer. My thoughts are in my homeland, India and my body is in China. The body is here and mind there for a good reason. Mr. Hu is president and I am resident and both are in each other's countries (what a difference the absence of one small letter makes!). Mr. Hu will return in a few days and I will stay on longer.