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Digital-image retrieval based on shape-feature and MPEG-7 standard

Digital-image retrieval based on shape-feature and MPEG-7 st...

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International Conference on Consumer Electronics, Communications and Networks

作者： Wu Siqing Xiong Gang Wang Geng Zhang Guoping School of Electronic and Information Engineering Xianning University Xianning China College of Physical Science and Technology Huangzhong Normal University Wuhan China

ISBN: (纸本)9781612844589

Shape features are an important feature of image, It is the result of carrying on the description to the picture target shape. Using shape feature to retrieval image may enhance accuracy and efficiency of retrieval. This paper introduced the three key aspects to realize image retrieval based on shape feature: the description to shape feature, the extraction shape feature, shape match and introduced the standard of multimedia-content-description interface - MPEG-7.

关键词： transform coding Shape Feature extraction Pattern recognition Image retrieval Educational institutions Markup languages

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Interfacing sensors and virtual world health avatar application

Interfacing sensors and virtual world health avatar applicat...

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International Conference on New Trends in Information and Service Science, NISS

作者： Sang-Kyun Kim Jonghoon Chun Hyunmin Park Dongseop Kwon Younghee Ro Computer Engineering Department Myongji University Yongin South Korea Daeyang Electric Company Limited Seoul South Korea

In this paper, a new mobile application system that controls health avatars on mobile devices is proposed. The status of health avatars reflects personal physical state of a user, which is converted and estimated by data gathered from sensors attached to exercise equipment or from the time spent on a specific exercise routine on specific equipment installed in a U-Health park. Especially in this paper, we confine ourselves on introduction to a metadata application system that converts sensor signals to MPEG-V International Standard data format (ISO/IEC 23005-5). The proposed system utilizes the biometric metadata written in standard data formats from sensors to visualize virtual world health avatars, which make users recognize their health condition without difficulty. The health avatar system and its application scenario are presented in this paper.

关键词： Avatars Temperature sensors Biosensors IEC standards transform coding Semantics

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Picture-level parameteric motion representation for efficient motion compensation

Picture-level parameteric motion representation for efficien...

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IEEE International Conference on Image Processing

作者： Jaewon Sung Seung-Wook Park Joonyoung Park Byeong-Moon Jeon Convergence Lab LG Electronics Limited Seoul South Korea

When a picture contains non-translational motions in it, a picture-level parametric motion model can be more efficient than the block-based translational motion model because the former has small number of parameters that can replace many motion vectors of individual blocks. In addition, the former can represent the deformation of the image better than the latter. Based on this idea, we detected multiple homography transformations between a reference and a current picture. Then, we generated warped reference pictures 1 corresponding to the homographies and inserted the one of the warped reference pictures into reference picture lists. We measured the performance of the proposed algorithm using the test condition that is proposed by MPEG and ITU recently. Experimental result showed 3.1% overall bitrate saving under low delay & high efficiency condition and 3.5% overall bitrate saving under random access & high efficiency condition compared with TMuC 0.7.3.

关键词： Conferences Video coding Vectors transform coding Motion compensation Bit rate Motion segmentation

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Distributive segmented PCA: A novel approach to hyperspectral image compression

Distributive segmented PCA: A novel approach to hyperspectra...

引用

International Conference on Application of Information and Communication Technologies (AICT)

作者： Abbasi Naveed Ahmed Fatima Syeda Narjis Institute of Avionics and AeroSpace (IAA) Air University Islamabad Pakistan

We propose a segmented PCA based distributed framework exploiting the high correlation and dimensionality reduction properties of PCA in conjugation with the distributed source coding paradigm for onboard hyperspectral image compression. The hybrid scheme deploying Lossy Wyner Ziv coding in conjunction with statistically segmented PCA strategy exploits the two fold intra group and inter group correlation for establishment of multiple independent processing elements evenly distributing the cumulative encoder load over the entire system. The net performance of this flexible infrastructure scheme is further increased by utilizing the superior rate distortion performance of JPEG2000 for high fidelity reconstruction of side information crucial for corresponding Wyner Ziv decoding. The inherent parallelism and low encoder complexity of the proposed scheme not only makes it a viable candidate for onboard implementation but also conforms it to subsequent multi node transmission. Experimental analysis demonstrates that the proposed scheme offers a novel perspective and competitive performance as compared to other techniques in the same domain.

关键词： Encoding Image coding transform coding Image segmentation Hyperspectral imaging Image reconstruction Bit rate

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Fast and accurate hybrid power estimation methodology for embedded systems

Fast and accurate hybrid power estimation methodology for em...

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Conference on Design and Architectures for Signal and Image Processing

作者： Santhosh Kumar Rethinagiri Rabie Ben Atitallah Smail Niar Eric Senn Jean-Luc Dekeyser INRIA Lille Nord Europe Université de Lille 1 Lille France LAMIH Universita de Valenciennes et du Hainaut Cambrésis Valenciennes France LAB-STICC Université de Bretagne Sud Lorient France

Nowadays, having the appropriate Electronic System Level (ESL) tools for power estimation in embedded systems is becoming mandatory. The main challenge for the design of such dedicated tools is to achieve a better trade-offs between accuracy and speed. In this paper, a new power consumption estimation methodology for embedded systems is proposed. First, the Functional Level Power Analysis (FLPA) is used to set up generic power models based on real board measurements. In the second step, a simulation framework is developed to evaluate accurately the architectural parameters of the elaborated power models. The proposed methodology has several benefits: it improves significantly the accuracy of the functional level approach and the power consumption estimation can be accomplished without a costly and complex material. In order to speed up the estimation process, our methodology refers to the selection of data pattern size and to the application sampling technique. Experimental results show that our tool achieves high simulation speed of 21 times faster with a marginal power estimation error of 1%.

关键词： Estimation Program processors Power demand Accuracy Hybrid power systems transform coding Solid modeling

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Scheduling of dynamic dataflow programs with model checking

Scheduling of dynamic dataflow programs with model checking

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IEEE Workshop on Signal Processing Systems (SIPS)

作者： Johan Ersfolk Ghislain Roquier Fareed Jokhio Johan Lilius Marco Mattavelli Åbo Akademi University Finland Turku Centre of Computer Science Finland École Polytechnique Fédérale de Lausanne Switzerland

The scheduling at compile-time of dynamic dataflow programs is still an open problem. This paper presents some initial results showing that scheduling of dynamic portions of CAL dataflow networks can be reduced to static scheduling by the analysis of the state space of network partitions. The CAL sub-network is converted to an equivalent Promela program and analyzed using a state analysis tool (SPIN) identifying deterministic schedules that link recurring network execution states. Therefore, the only dynamic operation of the scheduler remains the guard evaluations between states linked by the obtained deterministic schedules. Experiments show that the number of operations employed by dynamic schedulers is largely reduced when the schedules extracted by the state analysis are employed.

关键词： Schedules Dynamic scheduling Decoding transform coding Switches Processor scheduling Availability

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Binary Hybrid GA-PSO based algorithm for compression of hyperspectral data

Binary Hybrid GA-PSO based algorithm for compression of hype...

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International Conference on Signal Processing and Communication Systems, ICSPCS

作者： Pedram Ghamisi Farshid Sepehrband Jayran Choupan Mohammad Mortazavi Geodesy and Geomatics Engineering Faculty K. N. Toosi University of Technology Tehran Iran School of Science and Engineering Sharif University of Technology Kish Island Iran Faculty of School of Engineering and Technology Islamic Azad University Abhar Iran

This paper introduces two new compression methods. One of these methods is adaptive and powerful for the compression of hyperspectral data, which is based on separating the bands with different specifications by the histogram analyzes and new version of Binary Hybrid GA-PSO (BHGAPSO) and compressing each one with a different manner. The new proposed methods improve the compression ratio of the JPEG standards and save storage space the transmission system. The proposed methods are applied on different test cases, and the results are evaluated and compared with some other compression methods, such as lossless JPEG and JPEG2000.

关键词： Image coding Entropy Hyperspectral imaging Correlation transform coding Histograms Optimization

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Exploring the temporal placement for partially reconfigurable device

Exploring the temporal placement for partially reconfigurabl...

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International Conference on Communications, Computing and Control Applications (CCCA)

作者： Ramzi Ayadi Bouraoui Ouni Abdellatif Mtibaa Microélectronique (LAB IT06) Laboratoire d'Electronique et de Monastir (FSM) Tunisie

In this paper, we examine the temporal placement, showing how it can be decomposed into a number of distinct but not independent subtasks. Then, we detail the early algorithms that have been developed for solving the temporal placement problem. Next we introduced a new temporal placement algorithm that aims to reduce the routing cast between modules. And finally, experiments are conducted in order to evaluate the complexity and design performances of the proposed algorithm versus others temporal placement algorithms.

关键词： transform coding

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Improved CRT-based DCT domain watermarking technique with robustness against JPEG compression for digital media authentication

Improved CRT-based DCT domain watermarking technique with ro...

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IEEE International Conference on Systems, Man and Cybernetics

作者： Jagdish C. Patra A. K. Kishore Cedric Bornand School of Computer Engineering Nanyang Technological University Singapore HEIG-VD University of Applied Sciences Yverdon-les-Bains Switzerland

Digital watermarking techniques have been used as one of the means for copyright protection and authentication of multimedia data. Conventional Singular Value Decomposition (SVD)-based and Chinese Remainder Theorem (CRT)-based spatial domain watermark techniques do not perform well under JPEG compression. However, it is seen that the CRT-based watermarking technique in Discrete Cosine transform (DCT) domain performs well for JPEG compression. In the current paper, we presented an improved CRT-based DCT domain watermarking scheme. This method is shown to be more robust against cropping, tampering, addition of noise and JPEG compression. The existing CRT-based DCT domain technique results in increase in Tamper Assessment Function (TAF) due to the conversion into DCT domain, whereas the proposed method is shown to reduce TAF under DCT conversion.

关键词： Watermarking Discrete cosine transforms transform coding Image coding Robustness PSNR Frequency domain analysis

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A modified approach for image compression based on fuzzy transform

A modified approach for image compression based on fuzzy tra...

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Iranian Conference on Electrical Engineering (ICEE)

作者： Fatemeh Ghofrani Mohammad Sadegh Helfroush Shiraz University of Technology Iran

In this paper a modified image coding scheme based on discrete fuzzy transform is presented. In this method, the image is partitioned in to subimages of size 16×16, then any compressed subimage is obtained using fuzzy transform and uniform quantization according to the standard deviation of subimage. These subimages are decompressed with the related inverse fuzzy transform and recomposed for the reconstruction of the image. This method allows the user to select regions of interest and to compress each one with different quality factor. A comparison with the fuzzy-based image coding scheme (FTR) and JPEG method is performed. Experimental results show that the proposed method performs better than FTR and JPEG, especially for images with a low and medium level of details.

关键词： transforms transform coding Image coding Cameras Image reconstruction Birds Quantization

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