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Motion detection based on temporal-to-spatial conversion of depth maps for multi-view video

Motion detection based on temporal-to-spatial conversion of ...

引用

International Conference on Wireless Communications and Signal Processing (WCSP)

作者： Xiaoming Lu Mei Yu Yun Zhang Gangyi Jiang Faculty of Information Science and Engineering Ningbo University Ningbo China National Key Laboratory of Software New Technology Nanjing University Nanjing China

Motion detection and extraction for multi-view video (MVV) is one of the key technologies for MVV applications, and it has become a hot in recent years. In this paper, a new method that will use semantic information and movement information based on depth maps for motion detection is pro-posed. First, a sequence of consecutive depth images is converted into a sequence of consecutive temporal-to-spatial slices in the horizontal and vertical directions. In each one temporal-to-spatial slice, semantic information and motion information are both included, the background region forms a vertical line pattern, and a moving object creates an irregular, non-vertical structure. Second, to binarize the temporal-to-spatial slices are binarized by a dynamic threshold. Then we reconstruct the converted slices in the horizontal and vertical directions into temporal image masks, and reserve the common part of two corresponding masks. At last, by post-processing the reconstructed images, moving object masks can be obtained. Experiment results show that the proposed method exhibits a good performance for motion detection.

关键词： Motion detection Image converters Image segmentation Data mining Image reconstruction Object segmentation Videoconference Image edge detection Video sequences Space technology

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New no-reference blocking artifacts metric based on human visual system

New no-reference blocking artifacts metric based on human vi...

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International Conference on Wireless Communications and Signal Processing (WCSP)

作者： Ahong Wang Gangyi Jiang Xu Wang Mei Yu Faculty of Information Science and Engineering Ningbo University Ningbo China National Key Laboratory of Software New Technology Nanjing University Nanjing China

Block-based discrete cosine transform (BDCT) is an important tool in the image and video compression. Blocking artifacts caused by BDCT may be noticeable in the decoded image under low bit-rate conditions. Measuring blocking artifacts is of great significance in the evaluation of image and video image. To ensure reliability of the model outputs, a new no-reference blocking artifacts metric is proposed in this paper, based on human vision sensitivity by the research on a model of luminance and texture masking. Furthermore, blocking artifacts are measured with different weighting coefficient in flat regions and edge regions, respectively. Compared with Wang's blind measurement of blocking artifacts, experimental results illustrate that the proposed metric has better consistency to the visual perception, and it can reflect the image quality more effectively.

关键词： Humans Visual system Visual perception Video compression Image quality Distortion measurement Discrete cosine transforms Image coding Videoconference Transform coding

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An MLP-based face authentication technique robust to orientation

An MLP-based face authentication technique robust to orienta...

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International Joint Conference on Neural Networks (IJCNN)

作者： Goutam Chakraborty Basabi Chakraborty Jagdish C. Patra Chotipat Pornavalai Graduate School of Software and Information Iwate Prefectural University Japan School of Computer Engineering Nanyang Technological University Singapore Faculty of Information Technology King Mongkut''s Institute of Technology Ladkrabang Thailand

The need for stricter security, availability of sophisticated algorithms and improved hardware at cheaper price, are the driving forces for increasing popularity of biometric authentication. Machine authentication from face images or fingerprints at the entrance of a building or at bank-teller is getting more and more common. The popularity of using face image features for authentication is due to its ease of use. But its success depends on proper orientation and illumination. Facial features change with the angle of orientation, and even a genuine person would be rejected by the machine due to improper orientation of the face towards the camera. In this work, we proposed a multi-layer perceptron based face identification technique which is robust to orientation of the face image under similar illumination condition. Training data of facial features against orientation angle features is used to train a Multi-Layer Perceptron (MLP). It is then used for interpolation of facial features at different angles. Experiments were conducted with two types of face image identifying features, using PCA and ICA. A good interpolation property could be obtained by the trained MLP, and a zero equal error rate (EER) could be achieved.

关键词： Authentication Robustness Facial features Lighting Multilayer perceptrons Interpolation Security Hardware Biometrics Fingerprint recognition

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View Synthesis Oriented Depth Map Coding Algorithm

View Synthesis Oriented Depth Map Coding Algorithm

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Asia-Pacific Conference on information Processing, APCIP

作者： Bo Zhu Gangyi Jiang Yun Zhang Zongju Peng Mei Yu Faculty of Information Science and Engineering Ningbo University Ningbo China National Key Laboratory of Software New Technology Nanjing University Nanjing China

A view synthesis-oriented depth map coding algorithm is proposed in this paper. Depth map is classified into inner motion regions, background subtracted with edges and edge regions by using edge detection of current depth map and the frame difference between corresponding color images. Then macroblocks in different regions are encoded with different RDO schemes so as to speed up the encoding process while keep the quality of reconstructed depth map. Experimental results show that the proposed method not only improves the encoding speed significantly, but also saves bitrate of depth map sequence while maintaining high quality of synthesized virtual view images.

关键词： Color Cameras Layout Image edge detection Rendering (computer graphics) Image coding Compression algorithms information processing information science Motion detection

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Improving Usability of HTA Charts

Improving Usability of HTA Charts

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International Conference on Advances in Computer-Human Interaction

作者： Raja Jamilah Raja Yusof Khairuddin Hashim Faculty of Computer Science and Information Technology University of Malaya Kuala Lumpur Malaysia Software Engineering Department Tenaga National University Kajang Malaysia

This paper proposes improving the usability of HTA (hierarchical task analysis) chart through redefinition. The plans in the existing HTA chart (HTAe) are replaced with symbols giving a proposed representation of HTA chart (HTAs). An empirical experiment was done on both types of chart, the HTAe and the HTAs, to see whether there is an improvement on the usability of HTA chart. An analysis was done on the score given for each task done correctly in interpreting the chart. An improvement was recorded. Lastly, a further redefinition of HTA chart was done based on results of the experiment carried out.

关键词： Usability software engineering Computer interfaces User interfaces software systems Application software Process design Performance analysis Human computer interaction Computer science

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Fast Disparity Refinement Algorithm for Client-Oriented Multi-view Video System

Fast Disparity Refinement Algorithm for Client-Oriented Mult...

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Asia-Pacific Conference on information Processing, APCIP

作者： Mei Yu Tao Qiu Feng Shao Gangyi Jiang Faculty of Information Science and Engineering Ningbo University Ningbo China National Key Laboratory of Software New Technology Ningbo University Ningbo China

Compared to traditional multi-view systems, client-oriented multi-view video system could significantly simplify the complexity at the client since part of disparity estimation is left to the sever. This paper proposes a fast disparity refinement algorithm for the client-oriented multi-view video system. Firstly, the coarse disparity map is generated by adopting 8times8 block based disparity estimation based on smoothness restriction at the server, and the 8times8 block based disparity map is transmitted to the client. Then according to the spatial correlation of disparity vectors and disparity discontinuity at the boundary area of objects, pixel-wise disparity map is obtained with a fast disparity refinement algorithm. Experimental results show that, compared with the traditional block-matching based algorithm at the client, the disparity refinement algorithms spend no more than 2% time to generate a pixel-wise disparity map, moreover, the disparity maps are more smoother within the objects. Compared with the previous refinement algorithm, the proposed algorithm not only improves the quality of the reconstructed right view images, but also saves about 20% time for generating of pixel-wise disparity map.

关键词： Rendering (computer graphics) Three dimensional displays Cameras Bandwidth Costs Videoconference information processing information science Image reconstruction Pixel

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Design and implementation of knowledge-based framework for ground objects recognition in remote sensing images

Design and implementation of knowledge-based framework for g...

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MIPPR 2009 - Remote Sensing and GIS Data Processing and Other Applications: 6th International Symposium on Multispectral Image Processing and Pattern Recognition

作者： Chen, Shaobin Ding, Mingyue Cai, Chao Fu, Xiaowei Sun, Yue Chen, Duo Institute for Pattern Recognition and Artificial Intelligence of HUST Wuhan 430074 China College of Life Science and Technology HUST Wuhan 430074 China College of Software Engineering HUST Wuhan 430074 China National Lab. for Multi-spectral Information Processing Technologies Wuhan 430074 China

ISBN: (纸本)9780819478092

The advance of image processing makes knowledge-based automatic image interpretation much more realistic than ever. In the domain of remote sensing image processing, the introduction of knowledge enhances the confidence of recognition of typical ground objects. There are mainly two approaches to employ knowledge: the first one is scattering knowledge in concrete program and relevant knowledge of ground objects are fixed by programming;the second is systematically storing knowledge in knowledge base to offer a unified instruction for each object recognition procedure. In this paper, a knowledge-based framework for ground objects recognition in remote sensing image is proposed. This framework takes the second means for using knowledge with a hierarchical architecture. The recognition of typical airport demonstrated the feasibility of the proposed framework. © 2009 Copyright SPIE - The International Society for Optical engineering.

关键词： Knowledge based systems

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The Development of software Configuration Management Repository

The Development of Software Configuration Management Reposit...

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International Conference on information Management and engineering, ICIME

作者： Nuraminah R. Shukor Sanim M. Fauzi M. Hairul Nizam M. Nasir Faculty of Information Technology and Quantitative Sciences Universiti Teknologi Mara Arau Perlis Malaysia Department of Software Engineering University of Malaya Kuala Lumpur Malaysia

ISBN: (纸本)9781424437740

The idea of the OSCMR is to manage software configuration items (CSCI) of various software development processes. OSCMR has been designed and developed to run on the Internet and features simple user interfaces. It also has been designed to help beginners having a simple view of the software development process. Next, OSCMR is flexible enough to adapt itself to different software development methodologies. CSCI in OSCMR is referred to any documents from early phase of software development until the end of the software development process. It can contain anything that can be stored and distributed in electronic form such as source codes, compiled executables, change request forms, software testing materials, and others. In this paper, we discuss the overview of OSCMR.

关键词： software development management Programming technology management Open source software Network servers Conference management engineering management information technology Internet Content management

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Automatic Testing of Financial Charting software Component: A Case Study on Point and Figure Chart

Automatic Testing of Financial Charting Software Component: ...

引用

International Symposium on Computer Science and its Applications, CSA

作者： K. Y. Sim C. S. Low F.-C. Kuo School of Engineering Computing and Science Swinburne University of Technology Sarawak Malaysia Nextwave Software Gombak Malaysia Faculty of Information and Communication Technologies Swinburne University of Technology VIC Australia

ISBN: (纸本)9781424449453;9781424449460

Financial charting software is widely used for technical analysis of price movements in financial markets. Commercial off-the-shelf charting components are often used to build such software. However, the outputs of some charting components are difficult to be verified because the correct outputs are unknown, In many cases, charting output verification relies on subjective visual judgment and manual construction of the chart by the testers, which are prone to human errors. Hence, the charting components could be poorly tested before being integrated into software. In this paper, we perform a study on the Point and Figure charting component and propose an automatic testing technique that is built upon the notions of assertion checking and metamorphic testing to alleviate these problems. Experiments on pre-release builds of Nextwave software Point and Figure charting component show that this automatic testing technique has successfully detected real faults in the charting component tested.

关键词： Automatic testing software testing Humans Fault detection software packages Investments Communications technology Australia information analysis Performance evaluation

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Threats to Health information Security

Threats to Health Information Security

引用

The Fifth International Conference on information Assurance and Security(第五届信息保障与安全国际会议)

作者： Ganthan Narayana Samy Rabiah Ahmad Zuraini Ismail Department of Computer Systems and Communications Faculty of Computer Science and Information System Centre for Advanced Software Engineering (CASE) Faculty of Computer Science and Information Systems Department of Science College of Science and Technology Universiti Teknologi Malaysia (UTM) Malaysia

ISBN: (纸本)9781424451012

The purpose of this paper is to identify the threats that exist in Healthcare information Systems (HIS). The study has been carried out in three different departments namely, information technology Department (ITD), Medical Record Department (MRD) and X-Ray Department in one of the leading government supported hospital in Malaysia. The hospital was equipped with Total Hospital information System (THIS) environment. The data were collected using in-depth structured interviews. The study identified 22 types of threats according to major threat categories based on ISO/IEC 27002 (ISO 27799:2008). The result shows the most critical threat for the THIS is the power failure. In addition, acts of human error or failure threat also show high frequency of occurrence. The contribution of the paper will be categorization of threats in HIS and can be used to design and implement effective security systems and policies in healthcare setting.

关键词： Threats Healthcare information Systems (HIS) information Security Risk Analysis

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