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Modulating a Local Shape Descriptor through Biologically Inspired Color Feature

Journal of Bionic engineering 2014年第2期11卷 311-321页

作者： Hongwei Zhao Baoyu Zhou Pingping Liu Tianjiao Zhao School of Computer Science and Technology Jilin University Changchun 130012 P. R. China Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education Jilin University Changchun 130012 P. R. China

This paper presents a biologically inspired local image descriptor that combines color and shape features. Compared with previous descriptors, red-cyan cells associated with L, M, and S cones （L for long, M for medium, and S for short） are used to indicate one of the opponent color channels. Stepping forward from state-of-the-art color feature extraction, we exploit a new approach to compute the color orientation and magnitudes of three opponent color channels, namely, red-green, blue-yellow, and red-cyan, in two-dimensional space. Color orientation is calculated in histograms with magnitude weighting. We linearly concatenate the four-color-opponent-channel histogram and scale-invariant-feamre-transform histogram in the final step. We apply our biologically inspired descriptor to describe the local image feature. Quantitative comparisons with state-of-the-art descriptors demonstrate the significant advantages of maintaining invariance to photometric and geometric changes in image matching, particularly in cases, such as illumination variation and image blurring, where more color contrast information is observed.

关键词： local image descriptor color opponent color scale-invariant feature transform image matching

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Distributed Authentication Without Centre Authority Based on Threshold Theory for VANET

Distributed Authentication Without Centre Authority Based on...

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2015 International Conference on Automation,Mechanical and Electrical engineering(AMEE 2015)

作者： Y.J.Hou D.Wei J.Q.Zhu Z.Y.Yuan M.Li T.Sun College of Computer Science and Technology Jilin University Key Laboratory of Symbolic Computation and Know ledge Engineering of Ministry of Education Jilin University Changchun Regional Road Transportation Administrative Bureau

For emerging vehicle ad hoc network, the security problem is the biggest problem facing at present. The network is vulnerable to hacking and attacks. Generally, to join a region of the vehicle Ad Hoc networks, a vehicle node needs to be verified its identity by the roadside infrastructures first. This paper proposes an authentication mechanism based on threshold secret sharing mechanism without relying on the infrastructures. The proposed scheme conforms to the characteristics of the VANET, such as without the credible centre, self-organization and so on. The vehicle should be accepted by the other vehicles to communicate. The proposed authentication mechanism contains the generation of signing certificate, the update mechanism and the revocation mechanism. The availability and security of the network can be ensured in the scheme.

关键词： VANET without centre identity authentication threshold secret sharing

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A new statistics-based evaluation measure for classification models

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Journal of computational Information Systems 2014年第20期10卷 8775-8782页

作者： Ding, Tienan Li, Xiongfei Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education Jilin University Changchun China College of Computer Science and Technology Jilin University Changchun China Pinggang Middle School Shenzhen China

In this paper, we investigate the problem of evaluating the performance of classification models. First of all we propose the concept of weighted correct pair map. Then based on the weighted correct pair map, we proposed a new evaluation measure. The attractive features of the measure are that it is insensitive to imbalanced class distributions and discriminating enough. Experimental results demonstrate that the proposed measure is reliable. The work presented in this paper may stimulate new research in classification model designing, such as designing new optimization-based classification or ranking models.

关键词： Information systems

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Iris recognition based on probabilistic features

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Journal of computational Information Systems 2014年第20期10卷 8783-8792页

作者： Liu, Zhaojun Li, Xiongfei Zhao, Zhenting Key Laboratory of Symbolic Computation and Knowledge Engineering for Ministry of Education Jilin University Changchun China College of Computer Science and Technology Jilin University Changchun China College of Software Jilin University Changchun China

In this paper, we propose an iris recognition algorithm based on probabilistic features. At the image preprocessing step, we do many experiments on iris segmentation in order to minimize the negative influence on recognition caused by eyelash and eyelid. As different segmentation angle has different results, we have determined an ideal angle for further recognition. At the recognition step, iris is transformed into frequency domain by using Log Gabor filters. Then raw features are extracted. Probabilistic features, with two forms of distribution, random distribution and normal distribution, are set of vectors generated from these raw features. At the matching step, the raw features are replaced by the property features. KNN algorithm is used to decide the final result. Experiment results showed that the proposed method can make further improvement of recognition rates and reduce the time consumption significantly.

关键词： Normal distribution

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A new epistasis detecting algorithm based on ant colony optimization 14

A new epistasis detecting algorithm based on ant colony opti...

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6th International Conference on Internet Multimedia Computing and Service, ICIMCS 2014

作者： Zhou, Zhihui Liu, Guixia Su, Lingtao Han, Liang Yan, Lun College of Computer Science and Technology Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education Jilin University Changchun 130012 China

ISBN: (纸本)9781450328104

The rapid developments of chip-based technology have greatly improved human genetics and made routine the access of thousands of single nucleotide polymorphisms (SNPs) contributing to an informatics challenge. The characterization and interpretation of genes and gene-gene interactions that affect the susceptibility of common, complex multifactorial diseases is a computational and statistical challenge in genome-wide association studies (GWAS). Various methods have been proposed, but they have dificulty to be directly applied to GWAS caused by excessive search space and intensive computational burden. In this paper, we propose an ant colony optimization (ACO) based algorithm by combining the pheromone updating rule with the heuristic information. We tested power performance of our algorithm by conducting suficient experiments including a wide range of simulated datasets experiments and a real genome-wide dataset experiment. Experimental results demonstrate that our algorithm is time efficient and gain good performance in the term of the power of prediction accuracy. Copyright 2014 ACM.

关键词： Ant colony optimization

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Detecting epistasis by LASSO-penalized-model search algorithm in human Genome-Wide Association Studies

Detecting epistasis by LASSO-penalized-model search algorith...

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4th International Conference on Materials Science and Information Technology, MSIT 2014

作者： Zhou, Zhi Hui Liu, Gui Xia Su, Ling Tao Han, Liang Yan, Lun College of Computer Science and Technology Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education Jilin University Changchun 130012 China

ISBN: (纸本)9783038351733

Extensive studies have shown that many complex diseases are influenced by interaction of certain genes, while due to the limitations and drawbacks of adopting logistic regression (LR) to detect epistasis in human Genome-Wide Association Studies (GWAS), we propose a new method named LASSO-penalized-model search algorithm (LPMA) by restricting it to a tuning constant and combining it with a penalization of the L1-norm of the complexity parameter, and it is implemented utilizing the idea of multi-step strategy. LASSO penalized regression particularly shows advantageous properties when the number of factors far exceeds the number of samples. We compare the performance of LPMA with its competitors. Through simulated data experiments, LPMA performs better regarding to the identification of epistasis and prediction accuracy. © (2014) Trans Tech Publications, Switzerland.

关键词： Genes

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Density and sliding window-based clustering over evolving data streams

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ICIC Express Letters, Part B: Applications 2015年第8期6卷 2275-2283页

作者： Yu, Yanwei Zhao, Jindong Zhang, Yonggang Wen, Changci School of Computer and Control Engineering Yantai University No. 32 Qingquan Road Laishan District Yantai China Key Laboratory of Symbolic Computation and Knowledge Engineering of Ministry of Education Jilin University No. 2699 Qianjin Street Changchun China Jingchang Office of Chinese Airforce No. 11 Shuangyuan Road Shijingshan District Beijing China

Density-based clustering over huge volumes of evolving data streams is critical for many modern applications ranging from network traffic monitoring to moving object management. In this work, we propose an efficient density-based clustering algorithm under sliding window environments to handle evolving data streams. First, we use cell partition optimization to fast determine points’ status instead of expensive completed neighbor query for core points. Second, we cluster new and expired points with cell-cluster structure. Cell-cluster leverages relationships of connected cells around points to complete classification of the points in the cells. Under the effect analysis of new and expired points, we then design an exact clustering framework with cell partition and cell-cluster in streaming windows. Our experimental evaluation, using both real and synthetic streaming data, demonstrates that our algorithm shows effectiveness in capturing the clusters with noise and performs faster than state-of-the art methods, and scales to high volume data streams. © 2015, ICIC International.

关键词： Cells

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An object shrunken algorithm for image classification

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Journal of computational Information Systems 2014年第20期10卷 8741-8748页

作者： Pan, Zheng Ouyang, Dantong College of Computer Science and Technology Jilin University ChangChun China Key Laboratory of Computation and Knowledge Engineering Ministry of Education ChangChun China

In this letter, we suggest a novel Object Shrunken (OS) algorithm to handle the image classification task. Unlike the prior art, this letter considers the foreground or the object location in the image for more discriminative image-level representation. The OS algorithm suggests a straightforward procedure to box the object location. It first proposes a Weighted Local Outlier Factor (WLOF) to remove all the interest point outliers, and then positions the object location in terms of the distribution of the rest interest points. We evaluate the proposed algorithm on the well-known dataset Caltech-101. The resulting OS algorithm outperforms the state-of-art approaches in the image classification task.

关键词： Image classification

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Boosting image retrieving result with GPS sensor information

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Sensor Letters 2014年第2期12卷 213-217页

作者： Zhao, Hongwei Wang, Zhen Liu, Pingping Gao, Shan Nong, Zhimeng China School of Computer Science and Technology Jilin University Changchun China Key Laboratory of Symbolic Computation and Knowledge Engineering Ministry of Education No. 2699 Qianjin Street Chaoyang District Changchun China

Due to the limited computing resource on mobile devices, it is more difficult to get semantically relevant results from a large dataset in time in a mobile image retrieving system, compared with normal content based image retrieval system, such as in a PC. In order to fix up this problem, images annotated with GPS sensor information have been proposed in this *** an image is acquired by a mobile device, the corresponding location information deriving from GPS coordinates can be obtained by the GPS sensor embedded in the mobile device. For the purpose of using the GPS information, the index database should be built first. In such an indexed database, the whole image database is divided into several small independent databases according to images' location label. Depending on this indexed database and the location label of the query image, image retrieval is carried in a small dataset. To further accelerate the retrieval speed, the hash-based image feature is adopted in this paper. Experimental results show that our proposed method has excellent retrieval performance and low computational complexity. Copyright © 2014 American Scientific Publishers.

关键词： Global positioning system

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A directional algorithm based on shape context for 3D point pattern matching

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Journal of computational Information Systems 2015年第7期11卷 2355-2365页

作者： Pang, Kuo Liang, Yanchun Zhou, You Wang, Kangping Wang, Shu Key Laboratory for Symbol Computation and Knowledge Engineering of National Education Ministry College of Computer Science and Technology Jilin University Changchun China Department of Computer Science and Technology Zhuhai College of Jilin University Zhuhai China

Point pattern matching is the basis of image recognition and computer vision. Point pattern matching in three dimensional space with the presence of noise and outlier is an important research focus. In this paper, we present a novel method for point pattern matching base on shape context. Particularly, we aim to find robust feature points to determine the positive direction of the point set for three dimensional rotation. At the same time, we improve the feature extraction and similarity measurement, and then combine with bipartite map matching. Comparative experiments on both synthetic point sets and real data sets demonstrate that the proposed algorithm is effective and robust. ©, 2015, Binary Information Press. All right reserved.

关键词： Image recognition

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