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检索条件"任意字段=8th International Conference on Signal Image Technology and Internet Based Systems, SITIS 2012"

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8th international conference on signal image technology and internet based systems, sitis 2012

8th International Conference on Signal Image Technology and ...

引用

8th international conference on signal image technology and internet based systems, sitis 2012

ISBN: (纸本)9780769549118

the proceedings contain 137 papers. the topics discussed include: adapting the streaming video based on the estimated position of the region of interest;video error concealment of p-frame using packets of the following frames;efficient depth image compression using accurate depth discontinuity detection and prediction;an RGB-D database using Microsoft's Kinect for windows for face detection;edge-based automatic parameter selection for sub-optimal image despeckling using Kuan filter;design and application of a new multiscale multidirectional non-subsampled filter bank;compressed sensing face recognition method in heterogeneous database with small sample size problem;face recognition using multiscale and spatially enhanced Weber law descriptor;face recognition based on sparse representation classifier with Gabor-edge components histogram;and measuring the quality of IRIS segmentation for improved IRIS recognition performance.

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EDGE-based AUTOMATIC PARAMETER SELECTION FOR SUB-OPTIMAL image DESPECKLING USING KUAN FILTER

EDGE-BASED AUTOMATIC PARAMETER SELECTION FOR SUB-OPTIMAL IMA...

引用

8th international conference on signal image technology and internet based systems (sitis)

作者： Akl, Adib Tabbara, Kamal Yaacoub, Charles Holy Spirit Univ Kaslik Fac Engn Jounieh Lebanon

ISBN: (纸本)9780769549118

Multiplicative speckle noise is a common problem found in several imaging applications, mainly in SAR and ultrasound imaging. this paper targets the Kuan despeckling filter and seeks to optimize its output without the need for several runs of the filter with the parameters adjusted each time. the proposed solution estimates the optimal filter parameter value, which results in near-optimal performance, where the PSNR loss does not exceed 0.1 dB most of the time, compared to the best possible filter output.

关键词： Denoising filtering Kuan multiplicative noise speckle

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Fast image and Video Segmentation based on α-tree Multiscale Representation

Fast Image and Video Segmentation based on α-tree Multiscal...

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8th international conference on signal image technology and internet based systems (sitis)

作者： Merciol, Francois Lefevre, Sebastien Univ Bretagne Sud IRISA Vannes France

ISBN: (纸本)9780769549118;9781467351522

In this paper, we propose to rely on a recent image representation model, namely the alpha-tree, to achieve efficient segmentation of images and videos. the alpha-tree is a multiscale representation of an image, based on its quasi-flat zones. An in-depth study of this tree reveals some interesting features of image pixels and regions. these features are then used in the design of both automatic and interactive segmentation algorithms. Interactivity is achieved thanks to a new and efficient implementation scheme. Experiments on the Berkeley Segmentation Dataset lead to very promising results.

关键词： alpha-tree Multiscale Representation image Segmentation Video Matting

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Comparative Evaluation of Various Fractal Dimension Estimation Methods

Comparative Evaluation of Various Fractal Dimension Estimati...

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8th international conference on signal image technology and internet based systems (sitis)

作者： Lehamel, Malha Hammouche, Kamal Univ Mouloud Mammeri Fac Genie Elect & Informat Dept Automat Tizi Ouzou Algeria

ISBN: (纸本)9780769549118;9781467351522

the fractal dimension (FD) is an indicator of the complexity of form, shape or texture of images. Several fractal dimension estimation methods which lead to different results are developed. this paper draws up a survey on FD estimation methods and presents a comparative evaluation between eleven FD estimation techniques belonging to three different approaches namely box-counting, area measurement and fractional Brownian motion.

关键词： Fractal dimension estimation image analysis box-counting area measurement fractional Brownian motion(fBm)

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A Fine-Grained image Access Control Model

A Fine-Grained Image Access Control Model

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8th international conference on signal image technology and internet based systems (sitis)

作者： Al Bouna, Bechara Chbeir, Richard Gabillon, Alban Capolsini, Patrick Antonine Univ Dept Comp Sci Baabda Lebanon

ISBN: (纸本)9780769549118;9781467351522

Sharing and publishing images and photos have become the trend of nowadays (social networks, messengers, etc.). Providing appropriate techniques to preserve privacy and protect content of sensitive and private images is an essential need. In this paper, we present a novel security model for image content protection. In our model, we provide dynamic security rules based on first order logic to express constraints that can be applied to contextual information as well as low level features of images. We finally discuss a set of experiments and studies carried out to evaluate the proposed approach.

关键词： Multimedia Access control Logic Data protection

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Tiled image Container for Web Compatible Compound image Compression

Tiled Image Container for Web Compatible Compound Image Comp...

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8th international conference on signal image technology and internet based systems (sitis)

作者： Kuruvilla, Ashok Mathew Adobe Syst Inc San Jose CA 95110 USA

ISBN: (纸本)9780769549118

Encoding images containing mixed content in web compatible formats like PNG, GIF and JPEG poses challenges in maintaining the quality along with good compression. In this paper, we describe a method for improving the compression of web compatible compound images while retaining high quality. the proposed method is based on the principle that the compression ratio of a given image depends upon both the image content and the compression algorithm used. therefore, encoding various tiled regions in a given image with the algorithm appropriate to the content in the region improves the overall compression of the image. Further optimizations like sharing of indexed colors between the various tiles in the same image and removal of duplicate tiles improve the compression. this method would support both lossy and lossless compression. the resulting encoded data can be rendered by a web browser supporting CSS background-cropping or HTML5 canvas APIs.

关键词： Compression algorithms Web and internet services image quality

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Improving Barcode Detection with Combination of Simple Detectors

Improving Barcode Detection with Combination of Simple Detec...

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8th international conference on signal image technology and internet based systems (sitis)

作者： Bodnar, Peter Nyul, Laszlo G. Univ Szeged Dept Image Proc & Comp Graph H-6720 Szeged Hungary

ISBN: (纸本)9780769549118;9781467351522

Barcode detection is required in a wide range of real-life applications. Imaging conditions and techniques vary considerably and each application has its own requirements for detection speed and accuracy. In our earlier works we built barcode detectors using morphological operations and uniform partitioning with several approaches and showed their behaviour on a set of test images. In this work, we examine ensemble efficiency of those simple detectors using various aggregation methods. Using a combination of several simple features localization performance improves significantly.

关键词： barcode detection computer vision clustering feature extraction morphological filters distance transformation Hough transformation

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image SEGMENTATION thROUGH A HIERARCHY OF MINIMUM SPANNING TREES

IMAGE SEGMENTATION THROUGH A HIERARCHY OF MINIMUM SPANNING T...

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8th international conference on signal image technology and internet based systems (sitis)

作者： Infantino, Ignazio Gaglio, Salvatore Vella, Filippo Vetrano, Gaspare Natl Res Council Italy CNR Ist Calcolo & Reti Alte Prestaz Rome Italy

ISBN: (纸本)9780769549118

Many approaches have been adopted to solve the problem of image segmentation. Among them a noticeable part is based on graph theory casting the pixels as nodes in a graph. this paper proposes an algorithm to select clusters in the images (corresponding to relevant segments in the image) corresponding to the areas induced in the images through the search of the Minimum Spanning Tree (MST). In particular is is based on a clustering algorithm that extracts clusters computing a hierarchy of Minimum Spanning Trees. the main drawback of this previous algorithm is that the dimension of the cluster is not predictable and a relevant portion of found clusters can be composed by micro-clusters that are useless in the segments computation. A new algorithm and a new metric are proposed to select the exact number of clusters and avoid unmeaningful clusters.

关键词： image Segmentation Minimum Spanning Tree image segmentation Spanning tree Social Hierarchy images Clustering algorithms Clusters Graph theory

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Generalizing and Improving SQL/XML Query Evaluation

Generalizing and Improving SQL/XML Query Evaluation

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8th international conference on signal image technology and internet based systems (sitis)

作者： Boettcher, Stefan Bokermann, Dennis Hartel, Rita Univ Paderborn Dept Comp Sci D-33102 Paderborn Germany

ISBN: (纸本)9780769549118;9781467351522

SQL/XML has gained increasing interest whenever relational data has to be transformed to XML data, which is transferred, stored, or further processed in internet-based systems. However, SQL/XML is not supported by all relational database systems and SQL/XML query processing may become a bottleneck when large amounts of XML data are generated by SQL/XML queries. We have developed a technique to generalize and to improve the evaluation of SQL/XML queries in comparison to the SQL/XML query evaluation techniques provided by the database systems Oracle 11g and DB2. Our generalization supports the SQL/XML transformation of relational data into XML for all relational database systems, including those that up to now support only SQL, but not SQL/XML, and it allows generating compressed or uncompressed XML. the improvement is that our approach does this faster than Oracle 11g and than DB2 in most cases.

关键词： SQL/XML XML compression XML generation from relational databases for internet-based systems

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Open Source Platforms for internet Monitoring and Measurement

Open Source Platforms for Internet Monitoring and Measuremen...

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8th international conference on signal image technology and internet based systems (sitis)

作者： Aceto, Giuseppe Botta, Alessio de Donato, Walter Marchetta, Pietro Pescape, Antonio Ventre, Giorgio Univ Naples Federico II Naples Italy

ISBN: (纸本)9780769549118;9781467351522

Understanding the ever-changing scenario of computer networks and how they operate in the real world implies measuring and analyzing their characteristics. this in turn requires a set of advanced tools and methodologies to be shared among researches, along with the data derived from such activities. In this paper we first present some of the main issues and challenges in the field of internet Monitoring and Measurement, then we present several open source platforms we have developed in the last 10 years for monitoring heterogeneous and large scale networks. Finally, we describe some of the data sets we made publicly available to the research community.

关键词： BISmark D-ITG Hobbit Hynetd Plab TIE Traffic traces UANM Tie internet monitoring open source computer network Platform

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