用VHDL设计CRC发生器和校验器
本设计是利用 VHDL 硬件描述语言设计 CRC 发生器和校验器 。12 位信息加 5 位 CRC 校验码发送 、 接收 ,由两个模块组成 ,CRC 校验生成模块 ( 发送) 和 CRC校验检错模块 ( 接收) ,采用输入,输出都为并行的 CRC校验 生 成 方 式 。产 生 此 CRC 码 可 利 用 Peterson 和Brown 提出的移位寄存器电路实现 。初始时置各寄存器为 0 ,信息位串从高位起逐位输入电路 ,每送入一位就进行一次异或操作和循环移位 ,由于信息位串为 12 位 ,所以经过 12 次操作后 ,4 个寄存器中的值就是冗余位 。
- 2020-11-29下载
- 积分:1
改进的种子区域生长算法
站里这方面资源不多,特别是种子区域生长方面的很少,上传一个算一个吧rightnumleftnuIm percent2()Ivaluerightnumipercent2(rvalue)pm= lvalue/‖P‖,pma= rvalue/‖P‖‖Pwindows xpMATLAB (R2008aOtsa.RlenI=ll, Rlen2=60, percent1=55%c, percent270%b. Rlenl=ll, Rlen2=80, percent1=50%, percent2=94%c.Rlen1-1l, Rlen2-100 percent1-65%. percent2-80%d. Rlen1-1l, Rlen2-=80, percent1=60%. percent2-83%2cent 1percent2Percentppercent 13C1994-2012ChinaAcademicJournalElectronicPublishingHouse.Allrightsreservedhtlp://www.cnki.net[J]2007,29(6):854-857[J]26(2):93-962010,45(7):76-80[JI.1963:1l5-12005,26(11):[J],2005,17(1):1-3Research on the improved algorithm and application ofseed region growth method and its sail image extrationYAN Shen-hai, HUANG Xian-tong, LIU Yang(School of Mathematics Computer Science, Gannan Normal University, Ganzhou 341000, Jiangxi, ChinaAbstract: Seeded region growing is a common method of image segmentation. Its performance depends largelyon the seleclion of seed points and growth rules. In order Lo extract snail images with such methods more effectively.The article analyzes the basic idea of the seeded region growing method(SRG) and presents an improved seededregion growing method (ISRG) which is used to extract the snail images. In ISRG, novel similarities rules and anew dynamic threshold method are adopted. For the complex and various habitat of snail, ISRG selects the region growing seed points manually. It is demonstrated by experimental results that ISRG can achieve better snailimage extraction results under the complicated real-world sceneKey words: seeded region growing (SRG; image extraction; dynamic threshold; snail(E D:X, JC1994-2012ChinaAcademicJournalElectronicPublishingHouse.Allrightsreservedhtlp://www.cnki.net
- 2020-12-01下载
- 积分:1