Both of the storage and computational ability of wireless multiview video sensor array are very poor, so that low-power and low-complexity encoder device requires to be developed. In this paper, a region of interest (...
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(纸本)300018726X
Both of the storage and computational ability of wireless multiview video sensor array are very poor, so that low-power and low-complexity encoder device requires to be developed. In this paper, a region of interest (ROI) based Wyner-Ziv coding scheme with low encoding complexity is proposed. Since background and smooth regions are identified and only a few blocks with respect to motions need to be encoded so that the bit rate and computation can be saved in Wyner-Ziv coding. The proposed scheme encodes each view independently and performs joint decoding with side information interpolated from adjacent views. The experimental results show that the total encoding time of the WZC views of the proposed scheme is only 15.90% of the H.264 interframe coding time, which means that the computational complexity is reduced significantly.
Scientific workflows are a powerful programming technique for specifying complex computations using a number of otherwise independent components. When used in a Grid environment, it is possible to build powerful "...
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In this paper we develop a new method to model occurred faults in different parts of nonlinear systems. Using an Adaptive Neuro-Fuzzy Inference System (ANFIS) we build a model for faultless plant which is used in the ...
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The benefits of using design patterns have been widely acknowledged by experienced software professionals. The application of design patterns to object-oriented software development has already brought positive result...
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The benefits of using design patterns have been widely acknowledged by experienced software professionals. The application of design patterns to object-oriented software development has already brought positive results in practice. Reported benefits include significant increases in quality and productivity. However, using design patterns is not a trivial process especially for students and novice designers/programmers. This paper introduces a tool for teaching design patterns to students and novice designers/programmers in order to teach those recognizing appropriate patterns and applying them properly. It provides an interactive environment that is designed as if the users requested the information in multiple stages. Each stage adds additional features that were not included in the previous stage. The help supporting each stage guarantees that the user can understand the current stage and help him moving to the next stage. The tool provides a real life existence for each pattern selected that illustrates the application of that pattern in software development
As vast channels for communication such as the Internet are becoming popular, the security of digital media becomes a greater concern. Steganography is one of the techniques used to make detecting the transmitted data...
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As vast channels for communication such as the Internet are becoming popular, the security of digital media becomes a greater concern. Steganography is one of the techniques used to make detecting the transmitted data over channels more difficult, as hiding a message reduces the probability of detecting this message. In this paper we suggest a new steganography algorithm for hiding a gray image in one another. The cover is divided into blocks of equal sizes. Each block size equals the size of the embedding image. The results drawn in this paper with the similarity = 0.9717 are more improved and give the clear picture of the object
Modern scientific experiments can generate large amounts of data, which may be replicated and distributed across multiple resources to improve application performance and fault tolerance. Whilst a number of different ...
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Sequential point trees provide the state-of-the-art technique for rendering point models, by re-arranging hierarchical points sequentially according to geometric errors running on GPU for fast rendering. This paper pr...
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Sequential point trees provide the state-of-the-art technique for rendering point models, by re-arranging hierarchical points sequentially according to geometric errors running on GPU for fast rendering. This paper presents a view dependent method to augment sequential point trees by embedding the hierarchical tree structures in the sequential list of hierarchical points. By the method, two kinds of indices are constructed to facilitate the points rendering in an order mostly from near to far and from coarse to fine. As a result, invisible points can be culled view-dependently in high efficiency for hardware acceleration, and at the same time, the advantage of sequential point trees could be still fully taken. Therefore, the new method can run much faster than the conventional sequential point trees, and the acceleration can be highly promoted particularly when the objects possess complex occlusion relationship and viewed closely because invisible points would be in a high percentage of the points at finer levels.
H.264 is the new multimedia compression standard developed by VCEG and MPEG. In order to maximize the compression performance, H.264 adopts RDO mode decision techniques at the cost of very remarkable computational com...
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Several different approaches to Situational Method engineering exist. They differ in terms of the primary element of the paradigm: the method fragment definition. Here, we introduce four method fragment definitions fr...
Several different approaches to Situational Method engineering exist. They differ in terms of the primary element of the paradigm: the method fragment definition. Here, we introduce four method fragment definitions from the literature and compare their metamodels according to structural and functional criteria. The structural comparison showed a general alignment of some concepts that are sometimes referred with different names while the study of the compositional aspects results in evidence of substantial differences.
XML information retrieval (XML-IR) systems differ from traditional information retrieval systems by using structure of XML documents to retrieve more specific units of information than the documents themselves. Users ...
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XML information retrieval (XML-IR) systems differ from traditional information retrieval systems by using structure of XML documents to retrieve more specific units of information than the documents themselves. Users interact with XML-IR systems via structured queries that express their content and structural requirements. Historically, it has been common belief within the XML-IR community that structured queries will perform better than traditional keyword-only queries. However, recent system-orientated analysis has show that this assumption may be incorrect when system performance is averaged over a set of queries. Here, we test this assumption with users via a simulated work task experiment. We compare a keyword only interface with two user friendly XML-IR interfaces: NLPX, a natural language interface and Bricks, a query-bytemplate interface. This is the first time that a XML-IR natural language interface has been tested in user experiments. We compare the retrieval performance of all three interfaces and the usability of the two structured interfaces. Our results correspond to those of the system-orientated evaluation and indicate that structured queries do not aid retrieval performance. They also show that in terms of retrieval performance and usability the structured interfaces are comparable.
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