共查询到20条相似文献,搜索用时 56 毫秒
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用无需选取参数的Unit-linking PCNN进行自动图像分割 总被引:1,自引:0,他引:1
脉冲耦合神经网络(PCNN-Pulse Coupled Neural Network)是一种有生物学依据的人工神经网络,它可有效地用于图像分割。基于PCNN的图像分割效果取决于PCNN中各参数的选择。然而,图像分割时,各种不同的图像对应的PCNN参数是不同的,而PCNN参数的选择是困难的。本文提出了一种基于Unit-linking PCNN的图像分割新方法,解决了PCNN图像分割参数选择的难题。用本文提出的新方法可有效地自动分割各种图像,而无需考虑PCNN参数的选择,这对于PCNN的理论研究和实际应用有重要的意义。 相似文献
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脉冲耦合神经网络(Pulse Coupled Neural Network,PCNN)可有效的用于图像分割,但无法确定最优分割时的迭代次数.针对这一问题,文章从原始图像与分割图像的相似性出发,提出了一种基于最大互相关匹配的简化PCNN图像分割新方法.该算法通过计算原始图像与分割图像的相关匹配系数来确定最优分割.实验结果验证了该方法的有效性. 相似文献
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一种基于简化PCNN的自适应图像分割方法 总被引:35,自引:2,他引:33
近年来的研究表明,脉冲耦合神经网络(Pulse Coupled Neural Network,PCNN)可有效地用于图像分割.然而对于不同图像,常需要选取适当的网络参数,以得到有效的分割结果.但是,目前网络参数的选取还主要停留在人工调整和确定阶段,尚无一种能够根据图像本身特性自动确定参数的方法,这在很大程度上限制了PCNN的应用.针对这一问题,本文提出了一种基于简化PCNN的自适应图像分割方法,通过利用图像本身空间和灰度特性自动确定网络参数,实现对不同图像的分割.实验结果表明,本文算法可以有效地对不同图像进行自动分割,具有一定的健壮性. 相似文献
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文章研究了基于PCNN模型的图像分割。该方法利用PCNN模型有类似的灰度值与神经元对应可以同时发出脉冲的特征,保留图像的区域信息,显示了更多分割目标的细节信息,文章采用Lena图、Coins图以及经过模糊处理以后的Bike图进行了图像分割,并与最大类间方差Ostu分割方法进行了对比。实验结果表明,脉冲耦合神经网络分割方法利用最小的迭代次数、最快的分割速度,在图像的细节、轮廓以及去模糊方面实现了良好的分割效果。 相似文献
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基于神经网络的图像分割算法在FPGA上的实现 总被引:1,自引:0,他引:1
脉冲耦合神经网络(Pulse Coupled Neural Network,PCNN)是一种新型神经网络模型,作为研究图像分割的常用方法,一直广受关注.针对目前大量文献关注PCNN模型仿真实现研究的情况,本文基于PCNN模型提出了将最小交叉熵分割算法在FPGA硬件平台上进行实现.相比于传统的PCNN软件实现以及最大信息熵分割算法实现的方案,本文提出的图像分割方案最佳分割精准度高,具有处理速度快,实时性强,图像分割效果好的优势,应用范围更广,因此该设计具有较高实际应用价值. 相似文献
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Meihua Shen Wilfred Pau Nicolas Gani Jianping Wen Shashank Deshmukh Thorsten Lill Jian Zhang Hanming Wu Guqing Xing 《半导体技术》2004,29(8)
This paper presents a brief overview of the Applied Centura(R)DPS(R)system,configured with silicon etch DPS Ⅱ chamber, with emphasis on discussing tuning capability for CD uniformity control. It also presents the studies of etch process chemistry and film integration impact for an overall successful gate patterning development. Discussions will focus on resolutions to key issues, such as CD uniformity, line-edge roughness, and multilayer film etching integration. 相似文献
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White organic light-emitting devices based on fac tris(2- phenylpyridine) iridium sensitized 5,6,11,12-tetraphenylnap -hthacene 总被引:1,自引:0,他引:1
We have fabricated the white organic light-emitting devices (WOLEDs) based on 4,4' -bis(2,2 -diphenyl vinyl)-1,1' - biphenyl (DPVBi) and phosphorescence sensitized 5,6,11,12,-tetraphenylnaphthacene (rubrene). The device structure is ITO/2T-NATA (20 nm)/NPBX (20 nm)/CBP: x%Ir(ppy)3:0.5% rubrene (8 nm)/NPBX (5 nm)/DPVBi (30 nm)/Alq(30 nm)/LiF(0.5 nm)/A1. In the devices, DPVBi acts as a blue light-emitting layer, the rubrene is sensitized by a phosphorescent material, fac tris (2-phenylpyridine) iridium [Ir(ppy)3], acts as a yellow light-emitting layer, and N,N' -bis- (1-naphthyl)- N,N' -diphenyl -1, 1' -biphenyl-4,4' -diamine (NPBX) acts as a hole transporting and exciton blocker layer, respectively. When the concentration of Ir (PPY)3 is 6wt%, the maximum luminance is 24960 cd/m^2 at an applied voltage of 15 V, and the maximum luminous efficiency is 5.17 cd/A at an applied voltage of 8 V. 相似文献
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Complete approach to automatic identification and subpixel center location for ellipse feature 总被引:1,自引:0,他引:1
XUE Ting WU Bin SUN Mei YE Sheng-hua 《光电子快报》2008,4(1):51-54
To meet the need of automatic image features extraction with high precision in visual inspection, a complete approach to automatic identification and sub-pixel center location for similar-ellipse feature is proposed. In the method, the feature area is identified automatically based on the edge attribute, and the sub-pixel center location is accomplished with the leastsquare algorithm. It shows that the method is valid, practical, and has high precision by experiment. Meanwhile this method can meet the need of instrumentation of visual inspection because of easy realization and without man-machine interaction. 相似文献
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Credence Systems Corporation 《半导体技术》2004,29(9)
Integrated circuits (ICs) intended for increasingly sophisticated automotive applications bring unique test demands. Advanced ICs for applications such as highly integrated automatic braking system (ABS) and airbag controllers combine high voltage digital channels, significant VI demands and precise timing capability. Along with continued missioncritical reliability concerns, the trend toward higher voltage operation and increased device integration requires specialized test capabilities able to extend across the wide operating ranges found in automotive applications. Among these capabilities, automotive test requirements increasingly dictate a need for a cost-effective versatile mixed-signal pin electronics with very high data rates reaching up to 50MHz with a voltage swing of-2 V to +28 V. 相似文献
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It is of interest to get appropriate information about the dynamic behaviour of rotating machinery parts in service. This paper presents an approach of optical vibration and deviation measurement of such parts. Essential of this method is an image derotator combined with a high speed camera or a laser doppler vibrometer (LDV). 相似文献
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Zhang Xinsheng 《中国通信》2014,(1)
正Happy New Year!As we step into a new year,we take a look back at the key feature topics covered in China Communications over the past 12 months and set out our expecta- 相似文献
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正For a long time,optical and wireless systems/net-works are developed in separate communities witha few attempts for in-depth convergence.In fact,it prom-ises many advantages to combine the optical and wire-less technologies in the levels of systems and networks.Recently,both academia and industry have made manyefforts to enter a new phase of development to take op-tical and wireless systems as fully integrated networks.To provide high bandwidth and reliable service for bothfixed and mobile users,a well-designed network must 相似文献
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