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2012 International Conference on Communication, Information & Computing Technology (ICCICT)最新文献

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Extended visual cryptography for color images using coding tables 使用编码表的彩色图像扩展视觉密码学
M. Kamath, A. Parab, A. Salyankar, S. Dholay
Visual cryptography (VC) schemes encrypt a secret image into two or more cover images, called shares. The secret image can be reconstructed by stacking the shares together, with no complex cryptographic calculations. This paper proposes a new VC scheme for color images. The shares generated are similar to the cover images, thereby reducing the suspicion of data encryption. The proposed scheme makes use of Jarvis error filter, a key table and specialized tables for coding. High visual quality is achieved as up to 50 percent of the secret image can be recovered.
视觉加密(VC)方案将一个秘密图像加密成两个或多个封面图像,称为共享。秘密图像可以通过将共享叠加在一起来重建,而不需要复杂的加密计算。提出了一种新的彩色图像VC格式。生成的股份与封面图片相似,从而减少了对数据加密的怀疑。该方案利用Jarvis错误过滤器、键表和专用表进行编码。高达50%的秘密图像可以恢复,从而实现了高视觉质量。
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引用次数: 18
A 6–17 GHz linear wide tuning range and low power ring oscillator in 45nm CMOS process for electronic warfare 用于电子战的6-17 GHz线性宽调谐范围和45nm CMOS工艺低功率环形振荡器
B. Patro, J. K. Panigrahi, S. Mandal
A two-stage CMOS Voltage Controlled Ring Oscillator (VCRO) with very low power consumption has been designed in 45 nm CMOS process which operates at 1-V supply voltage. The circuit is simulated in GPDK 45 nm technology in Cadence environment. The simulation result shows wide tuning range from 6 GHz to 17 GHz and the oscillator can be used for electronic warfare application. It has also very low power consumption of about 3 μW. The phase noise of this ring oscillator is found to be -78 dBc/Hz @ 10 MHz offset which can be improved by using more number of stages.
设计了一种低功耗的两级CMOS压控环振荡器(VCRO),采用45 nm CMOS工艺,工作电压为1v。在Cadence环境下,采用GPDK 45纳米技术对电路进行了仿真。仿真结果表明,该振荡器具有6 ~ 17 GHz的宽调谐范围,可用于电子战。它还具有非常低的功耗,约为3 μW。发现该环形振荡器的相位噪声为-78 dBc/Hz @ 10 MHz偏移,可以通过使用更多的级数来改善。
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引用次数: 8
Reducing handover failure probability by repetitive scanning process 通过重复扫描过程降低切换失败概率
S. Chatterjee, J. K. Bag, M. Samadder
In wireless communication, handoff has become an important topic of research. A mobile station (MS) requires handoff when it travels out of the coverage area of its current access point (AP) and tries to associate with another AP. But handoff failure probability provides a serious barrier for such services to be made available to mobile platforms. Throughout the last few years plenty of research had been done to reduce handoff failure probability, whereas very few of them can be applied for an irregular (haphazard) motion of MS. In this paper, we are going to implement a new handoff scheme which is applicable for both regular and irregular motion of MS. We will find the minimum time interval (T) that the MS should stay within the handoff region (the particular area within a cell where the handoff is initiated and performed). We will repeat the scanning process number of times at different points of MS trajectory within the handoff region until the total scanning time exceeds the fixed time interval (T) and by doing so we can find out the most significant AP. Our simulation results show the effectiveness of our proposed scheme in practical field.
在无线通信中,切换已成为一个重要的研究课题。当移动站(MS)走出其当前接入点(AP)的覆盖区域并试图与另一个AP关联时,需要切换。但是切换失败的概率为移动平台提供此类服务提供了严重的障碍。在过去的几年里,大量的研究已经完成减少切换失败概率,而很少人可以申请一个不规则(偶然的)摘要女士的运动,我们要实现一个新的切换方案既适用于规则和不规则的运动,我们会发现女士的最小时间间隔(T),女士应该呆在切换区域(细胞内特定区域切换启动和执行)。我们将在切换区域内MS轨迹的不同点重复扫描过程次数,直到总扫描时间超过固定的时间间隔(T),从而找到最显著的AP。仿真结果表明了我们提出的方案在实际领域的有效性。
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引用次数: 1
A novel approach for saliency detection based on multiscale phase spectrum 一种基于多尺度相谱的显著性检测方法
D. Singh, S. Meher
Saliency detection is one of the core modules which is incorporated in various industrial applications such as computer vision, object based surveillance, content adaptive data delivery for low data rate systems. Saliency map represents the significance of objects in the scene. As in a visual scene all objects do not get equal attention. Objects which are different from their surroundings, automatically get more visual importance. Hardware based eye tracker devices are commercially available but the cost is comparatively very high. So to match the gaze attention, various algorithms are explored by several researchers. In this paper, multiscale phase spectrum based efficient saliency detection method is proposed. The proposed method is performing better by yielding better results than other methods. Four state-of-art of salient object detection techniques are analyzed along with the ground truth and compared against the proposed method for experimental evaluation.
显著性检测是集成在各种工业应用中的核心模块之一,如计算机视觉、基于对象的监控、低数据速率系统的内容自适应数据传输。显著性图表示场景中物体的重要性。就像在一个视觉场景中,并不是所有的物体都能得到同样的关注。与周围环境不同的物体会自动获得更多的视觉重要性。基于硬件的眼动仪已经上市,但成本相对较高。因此,为了匹配注视注意力,许多研究者探索了各种算法。提出了一种基于多尺度相谱的显著性检测方法。与其他方法相比,该方法的结果更好,性能更好。分析了四种显著目标检测技术的现状,并与所提出的方法进行了对比,进行了实验评价。
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引用次数: 0
‘Robot-Cloud’: A framework to assist heterogeneous low cost robots “机器人云”:一个帮助异构低成本机器人的框架
R. Doriya, P. Chakraborty, G. Nandi
This paper gives a framework to offer assistance to low cost ROS (Robot Operating System) supported heterogeneous robots in a large environment through cloud. To build such a system `Robot-Cloud' is prepared which extends the functionality of a robot. A `Robot-Cloud' is designed and implemented with components like cloud controller, ROS master node, storage unit, Map-reduce computing cluster and robotic services. In this system every robot is facilitated with ROS capability that helps to provide abstraction over hardware, heterogeneity and communication over TCP/IP. All the robots communicate with a master node present at the cloud controller to avail communication with other robots and to request services from the cloud. Our system supports all three basic service models i.e. Saas, PaaS and IaaS by incorporating typical SOA (Service Oriented Architecture) functionality. This approach can also be utilized to achieve a common goal for the networked robots. Finally, some simulation results are given to support the claimed framework.
本文提出了一个框架,通过云为大环境下支持异构机器人的低成本ROS (Robot Operating System)提供帮助。为了构建这样一个系统,准备了“机器人云”,它扩展了机器人的功能。“机器人云”由云控制器、ROS主节点、存储单元、Map-reduce计算集群和机器人服务等组件设计和实现。在这个系统中,每个机器人都具有ROS功能,有助于提供硬件抽象、异构和TCP/IP通信。所有机器人都与云控制器上的主节点通信,以便与其他机器人通信并从云请求服务。我们的系统通过整合典型的SOA(面向服务的体系结构)功能,支持所有三种基本服务模型,即Saas、PaaS和IaaS。这种方法也可以用于实现网络化机器人的共同目标。最后,给出了一些仿真结果来支持所要求的框架。
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引用次数: 37
Ternary SRAM for low power applications 用于低功耗应用的三元SRAM
H. Jayashree, V. P. Sai Shruthi
Design and Performance verification of Ternary CMOS SRAM is presented in this paper. Ternary SRAM is designed in 180nm, 90nm & 65nm technology process. The Ternary SRAM cell consists of two cross coupled Ternary inverters. READ and WRITE operations of the Ternary SRAM cell are performed with the help of Sense Amplifier, Tritline Conditioning circuits and Fast Decoders using TSPICE. The proposed work can be used for Low Power Application as the Fast Decoders use less number of Transistors compared to the conventional Decoders. The Ternary SRAM array module (1X1) in 65 nm technology consumes only 0.608mW power and data access time is about 9.88ns.
本文介绍了三元CMOS SRAM的设计与性能验证。三元SRAM采用180nm、90nm和65nm工艺设计。三元SRAM单元由两个交叉耦合三元逆变器组成。三元SRAM单元的读写操作是在感测放大器、三线调理电路和使用TSPICE的快速解码器的帮助下完成的。由于与传统解码器相比,快速解码器使用的晶体管数量更少,因此所提出的工作可用于低功耗应用。采用65纳米技术的Ternary SRAM阵列模块(1X1)功耗仅为0.608mW,数据访问时间约为9.88ns。
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引用次数: 4
Various techniques for low bit rate video coding 低比特率视频编码的各种技术
S. Mishra, S. Sawarkar
In this paper various techniques for low bit rate video coding are studied and implemented. The selection of an optimal regular-shaped pattern set for very low bit-rate video coding, focusing on moving regions has been the objective of much recent research in order to try and improve bit-rate efficiency. An approach to Variable Size Block Matching is also implemented, based on the binary partitioning of blocks. If a particular block does not allow for accurate motion compensation, then it is split into two using the horizontal or vertical line that achieves the maximum reduction in motion compensation error. This method causes partitioning to occur along motion boundaries, thus substantially reducing blocking artifacts. In addition, small blocks are placed in regions of complex motion, while large blocks cover regions of uniform motion. Also the paper is a review of the block matching algorithms used for motion estimation in video compression. It implements and compares 7 different types of block matching algorithms that range from the very basic Exhaustive Search to the recent fast adaptive algorithms like Adaptive Rood Pattern Search.
本文对各种低比特率视频编码技术进行了研究和实现。为非常低的比特率视频编码选择一个最优的规则形状模式集,重点是移动区域,已经成为最近许多研究的目标,以尝试和提高比特率效率。本文还实现了一种基于块二进制分割的可变大小块匹配方法。如果一个特定的块不允许精确的运动补偿,那么它被分成两个使用水平或垂直线,达到最大限度地减少运动补偿误差。这种方法导致沿运动边界进行分区,从而大大减少了阻塞工件。此外,小块被放置在复杂运动区域,而大块覆盖均匀运动区域。本文还对视频压缩中用于运动估计的块匹配算法进行了综述。它实现并比较了7种不同类型的块匹配算法,从非常基本的穷举搜索到最近的快速自适应算法,如自适应道路模式搜索。
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引用次数: 1
Performance improvement using average query fired to bins of four statistical moments for CBIR 使用CBIR的四个统计时刻的平均查询来提高性能
H. B. Kekre, Kavita Sonawane
This paper explains the effectiveness of average feature vector used as compared to a single query image feature vector to be fired to the CBIR designed using bins approach based on the partitioning of the equalized histograms of R, G and B planes of images. The feature vectors of dimension 27 are extracted into bins holding the statistical information of first 4 centralize absolute moments of R, G and B colors separately. Three different similarity measures are used in this paper for comparing the query image and database images namely Absolute distance, Euclidean distance and Cosine correlation distance. Experimentation of this approach is demonstrated for image database of 2000 BMP images containing 100 images from 20 different classes. Three parameters are used namely PRCP, LSRR and Longest String to evaluate the performance of the approaches used in this paper for CBIR.
本文解释了使用平均特征向量与单个查询图像特征向量相比的有效性,该特征向量将被发射到使用基于图像R, G和B平面的均衡直方图划分的bin方法设计的CBIR中。将27维特征向量提取到分别保存R、G、B颜色的前4个中心化绝对矩统计信息的箱子中。本文使用三种不同的相似性度量来比较查询图像和数据库图像,即绝对距离、欧几里得距离和余弦相关距离。在包含20个不同类别的100幅BMP图像的2000幅图像数据库中进行了实验。使用PRCP、LSRR和Longest String三个参数来评估本文所采用的CBIR方法的性能。
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引用次数: 2
A novel CPW-FED circular square-corner fractal antenna with varying notch-band for UWB applications 一种用于超宽带应用的新型CPW-FED变陷波带圆方角分形天线
K. Sawant, R. Kumar, A. Gaikwad
The design of this paper represents the novel cpw-fed circular square corner fractal antenna with varying notch-band frequency characteristics. The position and width of the notch-band can be adjusted in the entire operating band. A prototype of the antenna has been designed on FR4-Epoxy substrate dielectric constant 4.4 and thickness h=1.53 mm with a N-shape slot in coplanar waveguide feed of length L = 7.4 mm and slot width W = 2.8 mm. The experimental result of this antenna exhibits ultra wide band characteristics from frequency 3.1 GHz to 15.0 GHz. The notch in operating band helps to reduce the interference with the frequency bands of Wireless Local Area Network (WLAN). The simulated and experimental return losses are found in good agreement. The experimental radiation of this antenna in azimuth plane is nearly omni-directional. This proposed cpw-fed circular square corner fractal antenna with varying notch-band frequency characteristics can thus be used for Ultra wide band (UWB) system, microwave imaging, precision position system, and radar tracking system.
本文设计了一种具有变陷波带频率特性的新型cpw馈电圆方角分形天线。缺口带的位置和宽度可以在整个操作带中调节。在介电常数为4.4、厚度为h=1.53 mm的fr4 -环氧基板上设计了天线样机,共面波导馈电中n形槽长L = 7.4 mm,槽宽W = 2.8 mm。实验结果表明,该天线在3.1 GHz ~ 15.0 GHz范围内具有超宽带特性。工作频段的陷波有助于减少对无线局域网(WLAN)频段的干扰。仿真结果与实验结果吻合较好。该天线在方位面上的实验辐射几乎是全向的。该分形天线可用于超宽带(UWB)系统、微波成像系统、精密定位系统和雷达跟踪系统。
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引用次数: 9
Comparative analysis of off-line signature recognition 离线签名识别的对比分析
Rahul Dubey, D. Agrawal
Biometrics (or biometric authentication) assigns to the confirmation of humans by their biological features. Computer science, biometrics to be specific, is used as an aspect of determination and access control. It is also used to determine individuals in groups that are under examination. Handwriting is one of the most widely used biometric systems for authentication of person as well as document. Online and offline signature is existing in person identification and authentication problems. Offline signature categorizes the signature into two classes: genuine and forged. In this paper, we discuss various features of offline signature recognition and verification process. We review and compare existing techniques, their results and methods of feature extraction.
生物识别(或生物识别认证)是指通过人类的生物特征对其进行确认。计算机科学,具体地说,是生物计量学,被用作确定和访问控制的一个方面。它也被用来确定被检查群体中的个体。笔迹是一种应用最广泛的生物识别系统,可用于个人和文件的身份验证。在线签名和离线签名在个人身份识别和认证中都存在问题。离线签名将签名分为真实签名和伪造签名两类。在本文中,我们讨论了离线签名识别和验证过程的各种特点。我们回顾和比较了现有的技术,它们的结果和特征提取方法。
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引用次数: 7
期刊
2012 International Conference on Communication, Information & Computing Technology (ICCICT)
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