检索结果-内蒙古大学图书馆

8th International Conference on Image and Graphics, ICIG 2015

作者： Zhou, Baoliang Zheng, Aihua Jiang, Bo Li, Chenglong Tang, Jin Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education School of Computer Science and Technology AnHui University Hefei China Key Laboratory of Industry Image Processing and Analysis in Anhui Province Hefei China

ISBN: (纸本)9783319219684

Human salience of pedestrians images is distinctive and has been shown importantly in person re-identification (or pedestrians identification) problem. Thus, how to obtain the salient area of pedestrian images is important for this salience based pedestrians identification problem. In this paper, we first show that this kind of salient area detection can be formulated as a kind of outlier detection problem, and then propose a novel unsupervised salience learning method using a local outlier-detection technique for person re-identification task. The main feature of the proposed salience computation method is that it exploits both distance and density information simultaneously. Experimental results on several datasets show the effectiveness of the proposed salience based person re-identification method. © Springer International Publishing Switzerland 2015.

关键词： Statistics

来源：评论

学校读者我要写书评

暂无评论

Band structure of triangular lattices photonic crystals with lossy and dispersive materials

引用

Guangzi Xuebao/Acta Photonica Sinica 2016年第3期45卷 0319002-1-0319002-1-0319002-6页

作者： Niu, Kai-Kun Wang, Li-Hua Huang, Zhi-Xiang Wu, Bo Kuang, Xiao-Jing Wu, Xian-Liang Key Laboratory of Intelligent Computing and Signal Processing Anhui University Hefei230039 China Electronic and Information Engineering School Hefei Normal University Hefei230061 China

In order to explore the properties of photoniccrystals, the finite element method was introduced to calculate the band structure of lossy and dispersive photonic crystals with triangular lattice. By using this method, the calculation of band structure is reduced to a quadratic eigenvalue problem which the eigenvalue is the Bloch wave vector, the band structure and eigenmode can be obtained more effectively. The band structure in the TE and TM mode of photonic crystals with dielectric material in triangular lattice was compared with the reference to demonstrate the accuracy of the method. Furthermore, the dispersion relation of the lossy and lossless photonic crystals was also given by the proposed method. The symmetry and surface plasmon polarizations properties are found in lossless photonic crystals and electric field distributions are concentrated on the interface of dispersive materials and air. It is demonstrated in the lossy photonic crystals that the symmetry is destroyed, the surface plasmon polarizations properties are weakened and electric field density is decreased. The results can be used as theoretical basis and reference for studying the lossy photonic crystals and surface plasmon polarizations. © 2016, Science Press. All right reserved.

关键词： Finite element method

来源：评论

学校读者我要写书评

暂无评论

An image compression method based on block truncation coding and linear regression

引用

Journal of Information Hiding and Multimedia signal processing 2016年第1期7卷 198-215页

作者： Lyu, Wan-Li Chang, Chin-Chen Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education School of Computer Science and Technology Anhui University Hefei230039 China Department of Information Engineering and Computer Science Feng Chia University 100 Wenhwa Rd Seatwen Taichung40724 Taiwan Department of Computer Science and Information Engineering Asia University Taichung41354 Taiwan

This paper describes an image compression method based on block truncation coding (BTC) and linear regression coding (LRC) hybrid strategy. BTC is simple and easy to use, but only two representative values can not adequately represent the visual feature of image blocks. However, LRC can obtain different values of points with the line function by recording the coefficient of the regression line while the data distribution shows a linear relationship. The proposed method designs a hybrid strategy to combine the advantages of the two methods to improve image quality. In the paper, first, models are designed to rearrange the data of image blocks to satisfy a linear distribution, and then these models are used to code the image blocks. The experimental results indicated that the proposed method is superior to the BTC scheme in terms of image quality, and it can be used for image compression applications. © 2016.

关键词： Linear regression

来源：评论

学校读者我要写书评

暂无评论

Complete separable reversible data hiding in encrypted image 1st

Complete separable reversible data hiding in encrypted image

引用

1st International Conference on Cloud computing and Security, ICCCS 2015

作者： Zhaoxia, Yin Huabin, Wang Haifeng, Zhao Bin, Luo Xinpeng, Zhang Key Laboratory of Intelligent Computing and Signal Processing Ministry of Education Anhui University Hefei230601 China School of Communication and Information Engineering Shanghai University Shanghai200072 China

ISBN: (纸本)9783319270500

Reversible data hiding in encrypted image (RDHEI) is an emerging technology since it has good potential for practical applications such as encrypted image authentication, content owner identification and privacy protection. But there is one key problem of many existing published works, that the embedded data only can be extracted either before or after image decryption. In this paper, a complete separable reversible data hiding scheme in encrypted images is proposed. Additional data can be embedded into a cipher image which is encrypted by RC4 and can be extracted error-free both from the cipher domain and the plaintext domain. Moreover, the proposed method is simpler to calculate, while offering better performance. The results demonstrate that larger payload, better image quality, and error-free data extraction as well as image recovery are achieved. © Springer International Publishing Switzerland 2015.

关键词： Data privacy

来源：评论

学校读者我要写书评

暂无评论

Compressive holography reconstruction using phase-shifting interferometry

Compressive holography reconstruction using phase-shifting i...

引用

Three-Dimensional Imaging, Visualization, and Display 2015

作者： Zhang, Cheng Shen, Chuan Cheng, Hong Zhang, Fen Liu, Kaifeng Zhang, Quanbing Wei, Sui Key Laboratory of Intelligent and Computing Signal Processing Anhui University Hefei230039 China Key Laboratory of Modern Imaging and Displaying Technology of Anhui Province Hefei230039 China

ISBN: (纸本)9781628416114

In classical compressive holography (CH), which based on the Gabor holography setup, two nonlinear terms are inherent in the intensity recorded by a 2D detector arrays, the DC term and the squared field term. The DC term (the term at the origin) can be eliminated by filtering the Fourier transform of the interference irradiance measurements using appropriate high-pass filter near the zero frequency. The nonlinearity caused by the squared field term can be neglected and modeled as a error term in the measurement. However, the above assumptions are significantly limited, which yields the degradation of reconstruction quality. In this paper, an novel scheme using phase-shifting method is presented. To accurately recover the complex optical field caused by the propagation of the object, without the influence of the DC term and the squared field term, a very effective method for removing these two terms is introduced. The complex optical field of the 3D object and the complex optical field at the detector plane can be precisely represented by a linear mapping model. The complex optical field at the recorder plane is obtained by phase-shifting interferometry with multiple shots. Then, the corresponded complex optical field at the detector plane can be successfully extracted from multiple captured holograms using conventional four phase-shifting interferometry. From such complex optical field at the record plane, including the amplitude and phase information, the complex optical field of the 3D object can be reconstructed via an optimization procedure. Numerical results demonstrate the effectiveness of our proposed method. © 2015 SPIE.

关键词： Holograms

来源：评论

学校读者我要写书评

暂无评论

Reducing the ionospheric dispersion for P-band spaceborne SAR images by Stochastic Parallel Gradient Descent algorithm

Reducing the ionospheric dispersion for P-band spaceborne SA...

引用

IET International Radar Conference 2015

作者： Shi, Jing-Jing Yao, Bo-Dong Wu, Xian-Liang Key Laboratory of Intelligent Computing and Signal Processing Anhui University Hefei China Hefei Normal University Hefei China East China Research Institute of Electronic Engineering Hefei China

ISBN: (纸本)9781849199940

There has been an increasing interest in the use of spaceborne SAR for measuring forest biomass which requires the use of longer wavelengths for enhanced foliage penetration. However, the propagation characteristics of the wave will be seriously affected by the ionosphere, especially below P-band (500 MHz). In this paper, the ionospheric effects of the spaceborne SAR in range direction are theoretically analyzed. In order to correct those effects, a new method called Stochastic Parallel Gradient Descent (SPGD) algorithm which was already applied in adaptive optics is proposed, and the simulation results verify the effectiveness of this method.

关键词： Synthetic aperture radar

来源：评论

学校读者我要写书评

暂无评论

Spray and wait routing algorithm based on historic throughput ratio of nodes in DTN

引用

Journal of Computational Information Systems 2015年第19期11卷 6967-6974页

作者： Wang, Guizhu Li, Run Shao, Mei Ma, Yao Key Laboratory of Intelligent Computing & Signal Processing Ministry of Education Anhui University Hefei China

The performance of nodes shows great differences in Delay Tolerant Network (DTN). In order to estimate the performance of nodes in a more effective way, we put forwarded the concept of historic throughput ratio of nodes (HTR). Afterward, we proposed the Spray and Wait Routing algorithm based on historic throughput ratio of nodes (HTR-SW) in DTN Network. The algorithm uses the ratio of HTR to assign the number of message copies to the encounter nodes dynamically and to select the right length of messages sprayed to the encounter nodes. It not only solves the problem of being random and blind when using the Binary Spray and Wait (BSW) routing to spray the number of message copies, but also assigns the right length of messages according to the performance of the encounter nodes. The simulation results show that compared with the BSW algorithm, HTR-SW algorithm can enhance the message delivery probability, reduce the average latency and network overhead. At the same time, it can also reduce the number of messages forwarded by relay-nodes in the DTN network significantly. © 2015 by Binary Information Press.

关键词： Throughput

来源：评论

学校读者我要写书评

暂无评论

Diffusion tensor based curvature-driven difiusion model for digital inpainting

引用

Journal of Computational Information Systems 2015年第1期11卷 185-194页

作者： Qu, Lei Huang, Linsheng Wei, Sui Key Lab of Intelligent Computing and Signal Processing Ministry of Education Anhui University Hefei China

In this paper, we formulate the digital inpainting as a curvature-driven anisotropic concentration difiusing process. The difiusion strength along the gradient directions is defined as a function of curvature, so that the "Connectivity Principle" can be satisfied. Difierent to the classic Curvature-Driven Difiusion (CDD) model, the difiusion along the edge directions can be easily integrated into the difiusion equation in our model by using difiusion tensor. As result, more exibility in designing the local difiusion behavior is allowed, and the CDD model can be generalized as a special case. We show that our model can boost inpainting speed 3fi6 times and at the same time has similar inpainting quality compared to the widely used CDD model. Experimental results on synthetic and real images have verified the stability and eficiency of our model. ©, 2014, Journal of Computational Information Systems. All right reserved.

关键词： Tensors

来源：评论

学校读者我要写书评

暂无评论

Research on bearing micro deformation based on the frequency domain technique of white light speckle image

引用

Yi Qi Yi Biao Xue Bao/Chinese Journal of Scientific Instrument 2016年 37卷 46-52页

作者： Feng, Bo Xu, Chao Shao, Deyang Luo, Shixian Anhui Engineering Laboratory of Agro-Ecological Big Data Anhui University Hefei230601 China Key Laboratory of Intelligent Computing & Signal Processing Ministry of Education Hefei230601 China

In this paper, a new method of non contact and on-line measurement is presented for the change of the axis of the rotation axis. Under the condition of a constant light source, the image of the original position and the offset image in the original position are collected by the micro camera, These two pictures are calculated by the improved White light digital image point by point analysis method in this paper, and get the black and white stripes. The number and the angle of the fringe in the white light digital frequency domain interference image can be known as the offset and direction of the rotating shaft in the rotating process. Because this method only use a camera and a light source, and this method is very simple, and it can always detect, and it does not affect the normal work, so there is a wide range of industrial application prospects. This method can provide alarm before the plastic deformation occurs in the shaft, Reduce the risk of shaft damage. © 2016, Science Press. All right reserved.

关键词： Frequency domain analysis

来源：评论

学校读者我要写书评

暂无评论

Design of hardware-in-the-loop simulation system for LTE-A system based on USRP

Design of hardware-in-the-loop simulation system for LTE-A s...

引用

IEEE Conference on Industrial Electronics and Applications (ICIEA)

作者： Zhaoming Chen Yanjun Hu Xue Wang Haowen Wang Delin Cai Ministry of Education Key laboratory of Intelligent Computing & Signal Processing (Anhui University) Hefei P.R.China Shanghai Research Center for Wireless Communications Shanghai P.R.China China Electronics Technology Group Corporation No.38 Research Institute Hefei P.R.China

ISBN: (纸本)9781467386456

The traditional LTE-A algorithm validation is limited to pure computer software simulation, which can't simulate the actual link scenes, missing scene parameters, the simulation results is invaluable in practice. Therefore, this paper designs LTE-A hardware-in-the-loop simulation system based on software-defined radio device USRP, and the physical layer real-time test level downlink is designed on the system. The downlink scheduled by the scheduling algorithm of the PC simulation platform, with scene parameters feedback to MAC layer in real time. The downlink designed with power interference between cells and users simulate the actual scene. Compare to current design of LTE hardware-in-the-loop simulation, this design presents data interaction between MAC layer and physical layer, implement of specific requirements for physical layer link, instead of generation of vector signal only. The results show that the system is running normally with easy scalability.

关键词： Physical layer Interference Long Term Evolution Downlink Real-time systems Hardware Atmospheric modeling

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：