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Non-reference virtual view quality evaluation of MVD

Journal of Shanghai University(English Edition) 2011年第4期15卷 342-346页

作者：张艳安平张秋闻王元庆张兆杨 School of Communication and Information Engineering Shanghai University Department of Computer Science and Technology Anhui University of Finance and EconomicsBengbu 230030AnhuiP.R.China Key Laboratory of Advanced Display and System Application (shanghai University) Ministry of Education Department of Electronics Science and Engineering Nanjing University

The quality of virtual view based on multi-view video （MVD） plus depth format is often evaluated by PSNR or subjectively judged. However, due to synthesizing arbitrary view images, the virtual view images mostly have no reference images and are only assessed using non-reference. Virtual view images synthesized by depth estimation reference software （DERS） and view synthesis reference software （VSRS） often accompanied with blockiness and other distortions on the edge. In addition, matching level for the depth map and the corresponding texture maps of left and right views also affects the quality of the virtual view. This paper compares the edge similarity of the depth and the corresponding texture maps which generate the intermediate virtual view and combined with the virtual view＇s blockiness which causing blur to evaluate the quality of the virtual view. Experiment results show that the proposed method can reflect the quality of the virtual view better.

关键词： non-reference quality evaluation virtual view multi-view video （MVD） plus depth free viewpoint television （FTV）

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A system to discover correlations within a biological pathway between the expression levels of genes

A system to discover correlations within a biological pathwa...

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2011 11th IEEE International Conference on Bioinformatics and Bioengineering, BIBE 2011

作者： Wu, Li-Ching Chang, Cheng-Wei Chao, Tsung-Ming Yeh, Rong-Hwei Horng, Jorng-Tzong Institute of System Biology and Bioinformatics National Central University Taiwan Department of Information Management Hsing Wu College Taiwan Department of International Business Ching Yun University Taiwan Department of Photonics and Communication Engineering Asia University Taiwan Department of Computer Science and Information Engineering National Central University Taiwan Department of Bioinformatics Asia University Taiwan

ISBN: (纸本)9780769543918

Current pathway presentation method to the biologist is static graph. The analysis of differentially expressed genes using microarray gene expression data can help to find factors that affect diseases. However, the differentially expressed genes that are identified may be too large in number and it's difficult for biologist to pinpoint the correlations between genes and crucial points on pathway interactively. In this study, we propose a method that attempts to avoid this problem and allows the discovery of greater biological meaning than the traditional method. We select a gene pair set of interacting genes in a biological pathway and investigate the correlation in expression between the gene pairs under different condition (such as relapsed and non-relapsed breast cancer) using microarray gene expression data. We tested the approach using breast cancer relapsed and non-relapsed datasets in order to demonstrate that our method is both useful and reliable;very stable results were obtained when the same microarray platform was used. We finally use an interface to display correlations within a biological pathway. © 2011 IEEE.

关键词： Gene expression

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Analysis of the light dependent resistor configuration for line tracking robot application

Analysis of the light dependent resistor configuration for l...

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International Colloquium on Signal Processing & Its Applications, CSPA

作者： Nurfarhana Nasrudin Nur M. Ilis Tan P. Juin Terry Tan K. Chun Loo W. Zhe Fakhrul Z. Rokhani Department Of Computer and Communication System Engineering Faculty of Engineering Universiti Putra Malaysia Serdang Selangor Darul Ehsan Malaysia

Modern days, a robot can be designed based on human needs. In particular, the line tracking robot is a classic introductory robot design and needs minimal amount of material and cost. The aim of this project is to construct a robot that has capability to follow the white line placed on a horizontal smooth surface lighted by LED and the low cost light dependant resistor as the sensor. Rigorous analysis has been applied to determine the optimal configuration for the sensor on the mobile robot. Our findings show that angle of LDR of 30°, the distance between LDR and LED of 2.5cm and height of 2cm is the best configuration. The line tracking robot will detect the light intensity that is rebounded from the white color path.

关键词： Robot sensing systems Light emitting diodes Mobile robots Resistors Floors Algorithm design and analysis

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3DV quality model based depth maps for view synthesis in FTV system

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Journal of Shanghai University(English Edition) 2011年第4期15卷 335-341页

作者：张秋闻安平张艳张兆杨王元庆 Key Laboratory of Advanced Display and System Application (Shanghai University) Ministry of EducationShanghai 200072P.R.China School of Communication and Information Engineering Shanghai University Department of Computer Science and Technology Anhui University of Finance and EconomicsBengbu 230030AuhuiP.R.China Department of Electronics Science and Engineering Nanjing University

Depth maps are used for synthesis virtual view in free-viewpoint television （FTV） systems. When depth maps are derived using existing depth estimation methods, the depth distortions will cause undesirable artifacts in the synthesized views. To solve this problem, a 3D video quality model base depth maps （D-3DV） for virtual view synthesis and depth map coding in the FTV applications is proposed. First, the relationships between distortions in coded depth map and rendered view are derived. Then, a precisely 3DV quality model based depth characteristics is develop for the synthesized virtual views. Finally, based on D-3DV model, a multilateral filtering is applied as a pre-processed filter to reduce rendering artifacts. The experimental results evaluated by objective and subjective methods indicate that the proposed D-3DV model can reduce bit-rate of depth coding and achieve better rendering quality.

关键词： free-viewpoint television （FTV） 3D video quality model base depth maps （D-3DV） view synthesis

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The impact of light compensation on the performance of parametric skin detection model

International Journal of Signal Processing, Image Processing...

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International Journal of Signal Processing, Image Processing and Pattern Recognition 2011年第4期4卷 29-38页

作者： Mharib, Ahmed M. Mashohor, Syamsiah Ramli, Abdul Rahman Marhaban, Mohammad Hamiruce Department of Computer and Communication System Engineering Faculty of Engineering Universiti Putra Malaysia Malaysia Department of Electrical and Electronic Engineering Faculty of Engineering Universiti Putra Malaysia Malaysia

Skin detection is an essential step for important vision tasks such as the detection, tracking and recognition of face, segmentation of hand for gesture analysis, and person identification. Using skin color as a feature commonly raises problem related to the varying of lighting conditions due to the complex illuminated environment in the real world. Due to this problem, many researchers describe the lighting compensation algorithm as the best solution for such a problem that is indispensable for robust skin-tone color detection. This paper presents a study on the effect of light compensation on a skin color detection model which is based on the 2-dimensional normal distribution of the skin chromatic. A number of images captured in indoor and outdoor environments are used for the experiments to prove the effect of the studied algorithm. The findings show that the lighting compensation technique gives no significant effect on the performance of parametric skin detector model and therefore this problem demands for more research work.

关键词： Normal distribution

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Performance of subcarrier- OCDMA system with complementary subtraction detection technique

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World Academy of Science, engineering and Technology 2011年 51卷 1421-1426页

作者： Sahbudin, R.K.Z. Abdullah, M.K. Mokhtar, M. Anas, S.B.A. Hitam, S. Department of Computer and Communication System Engineering Faculty of Engineering Universiti Putra Malaysia 43400 Serdang Selangor Malaysia Universiti Putra Malaysia 43400 Serdang Selangor Malaysia

A subcarrier - spectral amplitude coding optical code division multiple access system using the Khazani-Syed code with Complementary subtraction detection technique is proposed. The proposed system has been analyzed by taking into account the effects of phase-induced intensity noise, shot noise, thermal noise and intermodulation distortion noise. The performance of the system has been compared with the spectral amplitude coding optical code division multiple access system using the Hadamard code and the Modified Quadratic Congruence code. The analysis shows that the proposed system can eliminate the multiple access interference using the Complementary subtraction detection technique, and hence improve the overall system performance.

关键词： Multiple access interference

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A new technique to reproduced High-Dynamic-Range images for Low-Dynamic-Range display

A new technique to reproduced High-Dynamic-Range images for ...

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IEEE International Conference on Signal and Image Processing Applications (ICSIPA)

作者： Tung Li Qian Suhaidi Shafie M. Iqbal Saripan Department of Electrical and Electronic Engineering Universiti Putra Malaysia Serdang Malaysia Department of Computer and Communication System Engineering Universiti Putra Malaysia Serdang Malaysia

Tone mapping is a process for reproduction of High-Dynamic-Range images (HDR) for Low-Dynamic-Range (LDR) output devices. In this report, author presents a new local tone-mapping operator, derived from the Contrast Limited Adaptive histogram Equalization (CLAHE) technique for displaying high dynamic range image. The CLAHE is a method which was originally developed for medical imaging. This method has effectively expanded the full dynamic range of display and it is fully automatic. Due to different luminance intervals could result in overlapped reaction on the limited response in limited response range of visual system, scene region splitting and merging were used to segment the scaled luminance and perform the image segmentation to segment image into smaller part. After the region splitting and merging, there will be some noise or variation of intensity that may result in holes or over segmentation. As the result, the morphological operation, opening and closing were used to perform the mask to applied different clip limit of the CLAHE operation.

关键词： Dynamic range Image segmentation Histograms Merging Imaging Conferences Tiles

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Packet Loss Differentiation of TCP over Mobile Ad Hoc Network Using Queue Usage Estimation

Packet Loss Differentiation of TCP over Mobile Ad Hoc Networ...

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2011 IEEE 3rd International Conference on communication Software and Networks(ICCSN 2011)

作者： Mohammad Amin Kheirandish Fard Sasan Karamizadeh Mohammad Aflaki Department of Computer system and Communication Universiti Teknologi Malaysia Faculty of engineering Multi Media University Cyberjaya Selangor Malaysia

the main deficiency of standard TCP and all existing variations in ad hoc mobile network arises in its inability to classify packet *** TCP diagnoses all losses due to congestion since non-congestion losses are rare and ignorable in wired ***,these losses are generated frequently in MANET due to signal attenuation,interference and node`s *** order to prevent TCP form invoking congestion control over non-congestion loss and vice versa,Packet loss classification with high accuracy is *** paper proposes an end-to-end sender-side approach which aims to classify congestion loss,wireless channel loss and link failure loss using queue usage *** One-way Trip Time is key factor in calculating queue *** losses with queue usage rate greater than predefined threshold is always interpreted as congestion loss no matter how loss ***,queue usage less than threshold signify presence of non-congestion ***-congestion loss which recognized by three duplicate ack labels loss due to wireless channel error since it is indication of route existence between communicating end point that duplicate ACKs moved *** Non-congestion loss which recognized after retransmission timer expiration has been probably due to link *** approaches efficiency are evaluated based on loss classification`s accuracy under different conditions such as various flow numbers,various wireless loss rates and variable speed for *** illustrate that obtained accuracy of enhanced scheme is the highest among proposed methods.

关键词： loss classification MANET

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Audio-Video Synchronous Coding Based on Mode Selection in H.264

Audio-Video Synchronous Coding Based on Mode Selection in H....

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2011 4th International Congress on Image and Signal Processing(第四届图像与信号处理国际学术会议 CISP 2011)

作者： Hexin Chen Xiaoyin Qi Xiaoni Li Dazhong Wang School of Communication Engineering Jilin University Changchun China Department of Computer System Tampere University of Technology Tampere Finland

An embedded audio-video synchronous coding scheme based on mode selection is proposed in the paper. In H.264, many mode types are employed to conduct inter prediction for determining the best one to achieve good coding efficiency. In the paper, the audio information is embedded into video stream by modulating the best mode in inter prediction, and then synchronous coding is applied to the mixing video and audio. The modulation is based on the cost function and mapping rules between the mode types and the audio bits. We have verified the proposed scheme based on H.264/AVC using JM 11.0 and evaluated it by four objective indicators: the video quality, the embedded cost, the change of bit-rate and the change of total encoding time. The experimental results show that this scheme has achieved synchronous coding between audio and video with small influence on the above four objective indicators.

关键词： synchronous coding inter mode selection H.264/A VC audio and video

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An advanced hybrid P2p botnet 2.0

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World Academy of Science, engineering and Technology 2011年 81卷 595-597页

作者： Lu, T.T. Liao, H.Y. Chen, M.F. The Department of Computer Science and Information Engineering University of Ching Yun Chung-Li Taoyuan County 320 Taiwan The Department of Institute of Computer Communication and System Engineering University of Ching Yun Chung-Li Taoyuan County 320 Taiwan

Recently, malware attacks have become more serious over the Internet by e-mail, denial of service (DoS) or distributed denial of service (DDoS). The Botnets have become a significant part of the Internet malware attacks. The traditional botnets include three parts - botmaster, command and control (C&C) servers and bots. The C&C servers receive commands from botmaster and control the distributions of computers remotely. Bots use DNS to find the positions of C&C server. In this paper, we propose an advanced hybrid peer-to-peer (P2P) botnet 2.0 (AHP2P botnet 2.0) using web 2.0 technology to hide the instructions from botmaster into social sites, which are regarded as C&C servers. Servent bots are regarded as sub-C&C servers to get the instructions from social sites. The AHP2P botnet 2.0 can evaluate the performance of servent bots, reduce DNS traffics from bots to C&C servers, and achieve harder detection bots actions than IRC-based botnets over the Internet.

关键词： Botnet

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