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检索条件"任意字段=International Conference on Signal Image Technology and Internet Based Systems"

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An image authentication technique based on cross chaotic map

An image authentication technique based on cross chaotic map

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international conference on Computational systems and Communications (ICCSC)

作者： Rija M Raju K. Gopakumar Dept. of ECE TKM College of Engineering Kollam Kerala India

Digital data transmitted through the internet can be copied and can be used in malicious ways. This may cause problems referring to the protection of intellectual rights and the integrity of the transmitted information. Watermarking has emerged as a new technology to resolve these problems, providing both copyright claiming mechanisms and integrity verification tools. A novel image authentication technique is proposed in this paper in which both discrete wavelet transform (DWT) and chaotic principle are combined effectively. The watermark is embedded using Haar wavelet transform and the cross chaotic map is generated by combining the non-periodical and non-convergence properties of Henon map and Arnolds Cat map. The map is run for a couple of iterations to generate a chaotic sequence, and the pixels of the watermarked image are encrypted with these sequences. The method proposed is efficient, fast and highly secure that can be used for digital data transmission.

关键词： Chaotic communication Watermarking Encryption Correlation Discrete wavelet transforms

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6th international conference on Mechanical and Electrical technology, ICMET 2014

6th International Conference on Mechanical and Electrical Te...

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6th international conference on Mechanical and Electrical technology, ICMET 2014

ISBN: (纸本)9783038352051

The proceedings contain 71 papers. The special focus in this conference is on on Mechanical and Electrical technology. The topics include: Dynamic equilibrium configurations of multibody systems;on the use of composite-steel joint for semi-monocoque frame design;influence of blast wave on behavior of steel plate;the new rolling mill gearbox concept design;design of a simple underactuated mechanical gripper;field investigation on thermal performance of the tile ventilator;computer aided design of the die-set for sheet metal punching and blanking dies;transient radiation coupled with conduction heat transfer in a one dimensional slab;a CAPP/CAD for sheet metal deep drawing;the effect of rise angle of v-hull non ballast ship on resistance performance;the effects of injection timing on BDF in an IDI diesel engine;the performance of the interlocking block solar collector;SOx reduction by feedwater in an industrial boiler;development of an oscillating drum granulator prototype for cassava pearl;2x2 rectangular-slot microstrip array antenna for WLAN applications;parallel-connected high voltage multiplier with symmetrical structure;electrical energy conservation in engineering industry;space frame analysis, design, and testing for electric vehicle formula;an innovative motion planning for 4-DOF PKM;dexterity measures for 4DOF exoskeleton robot;implementing expandable path for an resizable cobot;the performance of a delta telerobot;a study on mobile gait rehabilitation training robots;experiment of the state variable feedback for a quadrotor;vibration rejection and stabilization control for an inertial stabilization system;a new stator flux estimation method for direct torque control of electrical excitation flux-switching generator;improved spiht algorithm for texture image compression;10.3125Gbps high-speed SFP+ channel signal integrity evaluations;complex network based modeling and analysis of resource nodes for MG;comparative study on wear particle colour classifications

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Research on high resolution & high sensitivity panoramic surveillance system

Research on high resolution & high sensitivity panoramic sur...

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IEEE conference on Advanced Video and signal based Surveillance (AVSS)

作者： Zhenhai Zhang Kejie Li Bo Hu Bo Pu Jiyang Li Zijie Jiang Mengying Liu Tao Li Xudong Liu School of Mechatronics Engineering Beijing Institute of Technology Haidian District Beijing P.R. China The Institutes of Unmanned Ground Systems Beijing Institute of Technology Haidian District Beijing P.R. China

Catadioptric panoramic vision systems have been widely used in many fields because of their advantages such as a wide field of view, integrated imaging, and rotational symmetry. They also play a very important role in the monitoring of unmanned platforms. However, the resolution of catadioptric panoramic vision systems is not very high, usually less than 5 million pixels at present. Even if the resolution is greater than 5 million pixels, the unwrapping and rectification of these images is carried out off-line. Further, the systems are also deployed in a stationary or near-stationary state. This paper proposes an unwrapping and rectification method for a high-resolution catadioptric panoramic vision system that can be used while moving. It can segment dynamic circular mark regions from panoramic videos accurately, determine the center coordinates of circular images in real time, eliminate the processing of unwanted video regions, and shorten the image processing time. In addition, the center coordinates and radius of the circular mark regions are obtained simultaneously so that the image distortion caused by inaccurate center coordinates is reduced. The method uses radial and decentering distortion parameters and a correction factor for fitting a polynomial to rectify the panoramic video without distortion.

关键词： Machine vision Cameras image resolution Lenses Charge coupled devices Approximation algorithms image segmentation

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Study on multiple image processing hardware system based on DSP

Study on multiple image processing hardware system based on ...

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IEEE international conference on Mechatronics and Automation

作者： Junchao Zhu Yongchen Li Zhijun Ma Yingkui Jiao Baofeng Zhang Tianjin Key Laboratory for Control Theory and Applications in Complicated Systems Tianjin University of Technology Xiqing District Tianjin China School of Electrical Engineering Tianjin University of Technology Xiqing District Tianjin China

ISBN: (纸本)9781479939800

This paper presents the hardware system scheme of multi-channel image processing based on DSP, with DSP as the core control of FPGA and CMOS, responsible for the overall scheduling system, using FPGA as coprocessor responsible for the collection of the original image information from CMOS. This paper combines the fisheye lens to obtain the complete original image for panoramic vision and stereo vision requirement. FPGA is used to design the SRAM cache controller based on Ping-pong mechanism. The data exchanging between DSP and FPGA are completed in EDMA model of DSP. Asynchronous FIFO is applied to solve the problem of cross clock domain. Experiments show that the system can be realized in the image data acquisition speed of 45 frames per second and the output of PAL style distortion fisheye image.

关键词： Field programmable gate arrays Digital signal processing CMOS integrated circuits Lenses Hardware image processing Random access memory

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Gait recognition basded on Contourlet Transform and Collaborative Representation

Gait recognition basded on Contourlet Transform and Collabor...

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international conference on signal Processing Proceedings (ICSP)

作者： Jieru Jia Qiuqi Ruan Beijing Key Laboratory of Advanced Information Science and Network Technology Beijing China Institute of Information Science Beijing Jiaotong University Beijing China

ISBN: (纸本)9781479921898

Gait recognition is an important task for video surveillance systems. In this paper, we propose a novel gait recognition algorithm based on Contourlet Transform and Collaborative Representation. Contourlet transform is adopted to extract multi-scale and multi-direction features of Gait Energy image (GEI). Then, different from recent works, we use Collaborative Representation based Classification (CRC) instead of Sparse Representation based Classification (SRC) to classify the gait sequences. CRC uses l 2 -norm instead of the expensive l 1 -norm for coefficients regularization, which makes it much more efficient. The experimental results on the benchmark CASIA B gait database demonstrate that our method can get state-of-the-art performance.

关键词： Transforms Gait recognition Feature extraction Collaboration Databases Legged locomotion image reconstruction

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Face recognition systems based on independent component analysis and support vector machine

Face recognition systems based on independent component anal...

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international conference on Audio, Language and image Processing, ICALIP

作者： Jia Jun Zhang Yu Ting Shi Zhejiang Key Lab. for Signal Processing Zhejiang University of Technology Hangzhou Zhejiang P.R. China

ISBN: (纸本)9781479939046

This paper presents an approach for face recognition system based on independent component analysis (ICA) and support vector machine(SVM). The ICA is a feature extraction technique for isolating a multivariate signal into additive subcomponents by considering that the hidden components are non-Gaussian signals. It has been mainly used on the problem of blind signal separation, while support vector machine is a very effective tool to classify the objects/faces into the right category. In this paper, a face recognition system was proposed based on these two techniques. Experiments were carried out on ORL, Yale and YaleB face databases. Simulation results reveal that the proposed system using ICA and SVM can achieve a higher recognition rate with the increasing number of face features. The results also show that the SVM using radial basis functions yields a better performance.

关键词： Support vector machines Face Face recognition Databases Principal component analysis Kernel Independent component analysis

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Study of variable spray control system based on machine vision

Study of variable spray control system based on machine visi...

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IEEE international conference on Cognitive Informatics

作者： Rui Zhang Lepeng Song College of Electrical & Information Engineering Chongqing University of Science and Technology Chongqing China

This system captures and analyses the growth of crops based on machine vision technology, controlled by the PLC variables and achieve the objective of saving fertilizer, improving economic efficiency and protecting the environment. It uses shape or texture of the crops and background information contained in the image to classify, builds database algorithms, processes the collecting real-time signal by the internal computer and provides a spray flow rate required by the target area of operation, thus achieves variable spray to the target automatically. As a result, the real-time database of the precision agriculture variable spray is created; the system then receives the target spray flow signals on the intelligent platform and variable sprays with an intelligent spray operation platform speed.

关键词： Control systems Real-time systems image segmentation Agriculture Valves Machine vision Computers

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An improved steganographic approach to diminish data modification for enhancing image quality

An improved steganographic approach to diminish data modific...

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international conference on Medical Imaging, m-Health and Emerging Communication systems (MedCom)

作者： Pavninderpal Kaur Harchet Singh Anupama Gupta Akshay Girdhar Department of Computer Science and Engineering Lala Lajpat Rai Institute of Engineering and Technology Moga India Department of Information Technology Guru Nanak Dev Engineering College Ludhiana India

This paper introduces a hybrid approach to steganography which is based on the least significant bit substitution. It is a standalone steganographic technique that is focused on reducing the changes in the least significant bits of cover image by finding identical matches between image pixel values and message bits. The two least significant bits of cover image are changed only in case when no identical match is found between them. Hence, it aims to minimize the image degradation factor when message is embedded in cover image to form steganographic image by diminishing the data modification in least significant bits. In order to improve the security of message, the concept of jump table is used, i.e., message is scattered on the blocked image rather than embedding it on continuous pixels which makes extraction a semi-blind process. The proposed algorithm is validated using peak signal to noise ratio, correlation coefficient and structural similarity index matrix.

关键词： Streaming media PSNR Biomedical imaging image segmentation Computer science Security

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Identification of environmental influences in electronic nose measurement data

Identification of environmental influences in electronic nos...

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IEEE Instrumentation and Measurement technology conference

作者： Maximilian Fechteler Matthias Blankenburg Jörg Krüger Technische Universitat Berlin Berlin Berlin DE Fraunhofer Institute for Production Systems and Design Technology Berlin Germany

ISBN: (纸本)9781467363846

For the purpose of detection of counterfeits a metal-oxide gas sensor array is applied to measure the odor bouquet of textile probes. Since this has to be done in arbitrary environments the sensor data has to be processed to separate the probe signal from environmental influences. In this article we propose a method for detecting and clearing environmental influences caused by temperature and humidity variations in electronic nose based datasets.

关键词： Indexes Textiles Humidity measurement Encyclopedias Electronic publishing internet

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3D medical images denoising

3D medical images denoising

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international image Processing, Applications and systems conference (IPAS)

作者： Feriel Romdhane Faouzi Benzarti Hamid Amiri Signal Image and Information Technology Laboratory (SITI) National Engineering School of Tunis (ENIT)

The two-dimensional images are often insufficient to achieve a perfect diagnosis in the medical area; on the other hand the three-dimensional images allow having an interesting deductive vision and there denoising has become a necessity and an essential need. Many methods have been proposed to reduce noise and to preserve edge, are usually used for 2D images and they have been extended to 3D data. The Non-Local Means filter has become the most popular one for denoising medical images, based on a weighted average of voxels inside a search window. In this work, we present a new method in the field of 3D image denoising based on combination between Non-local Means filters and the diffusion tensor. Our proposed algorithm is to normalize the weight average by adding iteratively an anisotropic diffusion stencil. The performance and efficiency of the algorithm are estimated by calculating various quality metrics and compared with other methods.

关键词： Noise reduction Three-dimensional displays Biomedical imaging Noise Anisotropic magnetoresistance Filtering algorithms Tensile stress

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