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Facial performance illumination transfer from a single video using interpolation in non-skin region

Facial performance illumination transfer from a single video...

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作者： Wu, Hongyu Chen, Xiaowu Yang, Mengxia Fang, Zhihong State Key Laboratory of Virtual Reality Technology and Systems School of Computer Science and Engineering Beihang University Beijing China

This paper proposes a novel video-based method to transfer the illumination from a single reference facial performance video to a target one taken under nearly uniform illumination. We first filter the key frames of the reference and the target face videos with an edge-preserving filter. Then, the illumination component of reference key frame is extracted through dividing the filtered reference key frames by the corresponding filtered target key frames in skin region. The differences in non-skin region caused by different expressions between the reference and target face may bring about artifacts. Therefore, we interpolate the illumination component of the non-skin region by that of the surrounded skin region to ensure the spatial smoothness and consistency. After that, the illumination components of key frames are propagated to non-key frames to ensure the temporal consistency between the two adjacent frames. We obtain convincing results by transferring the illumination effects of a single reference facial performance video to a target one with the spatial and temporal consistencies preserved. Copyright © 2013 John Wiley & Sons, Ltd.

关键词： Interpolation

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Automatic image inpainting by heuristic texture and structure completion

Automatic image inpainting by heuristic texture and structur...

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16th International Multimedia Modeling Conference on Advances in Multimedia Modeling, MMM 2010

作者： Chen, Xiaowu Xu, Fang State Key Laboratory of Virtual Reality Technology and Systems School of Computer Science and Engineering Beihang University Beijing China

ISBN: (纸本)3642113001

This paper studies an image inpainting solution based on a primal sketch representation model [1], which divides an image into structure (sketchable) and texture (non-sketchable) components. This solution first predicts the missing structures, such as curves and corners, using a tensor voting algorithm [2]. Then the texture parts along structural sketches are synthesized with the patches sampled from the known regions, and the remaining texture parts are defused using a graph cuts algorithm [3]. Compared to the state-of-art image inpainting approaches, the characteristics of this solution include: 1) using the primal sketch representation model to guide completion for visual consistency;2) achieving fully automatic completion. Finally, the experiments on the public datasets show above characteristics. © 2010 Springer-Verlag Berlin Heidelberg.

关键词： Graphic methods

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Using GPU to accelerate a pin-based multi-level cache simulator 10

Using GPU to accelerate a pin-based multi-level cache simula...

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Proceedings of the 2010 Spring Simulation Multiconference

作者： Han, Wan Gao, Xiaopeng Long, Xiang Chen, Xianqin State Key Laboratory of Virtual Reality Technology and System School of Computer Science and Engineering Beihang University Beijing China

ISBN: (纸本)9781450300698

Trace-driven simulation methodology is the most widely used method to evaluate the design of future computer memory architecture. Since this methodology demands large amounts of storage and computer time, there is a growing need for simulation methodologies to determine the memory system requirements of emerging workloads in a reasonable amount of time. Several techniques have been proposed to reduce the space that store memory reference and improve the performance of sequential trace-driven simulation. This paper presents the use of binary instrumentation as the memory reference generator and parallel simulation technique that based on the generic graphics processing unit (GPU). One way to achieve fast parallel simulation is to simulate the independent sets of a cache concurrently on different compute resource, but results show that this method is not efficient because of a high correlation of the activity between different sets. To put parallelism to effective use, we show that a multi-configuration simulation in single pass method gains 2.44x performance improvement compared to traditional sequential algorithm. © 2010 SCS.

关键词： Graphics processing unit

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Chinese character image retrieval based on moment invariants and shape context

Chinese character image retrieval based on moment invariants...

引用

IEEE International Conference on computer and Communications, ICCC 2015

作者： Zhan, Huanian Qi, Yue State Key Laboratory of Virtual Reality Technology and Systems School of Computer Science and Engineering Beihang University Beijing China

ISBN: (纸本)9781467381253

This paper presents a retrieval method for the image of Chinese characters calligraphy. The precision and recall rate are main indicators to measure the quality of image retrieval algorithm. Starting from the two aspects, there are two parts in the process of image retrieve which is proposed in this paper. In this paper, carry out the retrieve with the Hu invariant moment matching algorithm, which is fast and efficient, but little of the accuracy. Then, execute trice retrieval with shape context algorithm taking the advantages of high level of accuracy and good robustness based on the result set of the first retrieval. Experiments show that the method referred in this paper is accurate and efficient. © 2015 IEEE.

关键词： Image retrieval

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Inference rules based on XML functional dependency and XML multi-valued dependency

Inference rules based on XML functional dependency and XML m...

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2014 International Conference on Future Information Engineering and Manufacturing Science(FIEMS 2014)

作者： Zhongping Zhang Shanshan Shi The School of Information Science and Engineering Yanshan University The Key Laboratory for Computer Virtual Technology and System Integration of Hebei Province

ISBN: (纸本)9781138026445

There not only exists the relation of the functional dependency and multi-valued dependency in XML data constraint,but also exists the relation of data dependency obtained only from a certain existing relationship instance that is *** reducing data redundancy,in this paper,the concepts of XML functional dependency and XML multi-valued dependency based on the path expression in the Document Type Definition are *** then the inference rules on the condition of the coexistence of functional dependency and multi-valued dependency in XML are ***,the validity and completeness of the inference rules are *** above-mentioned fundamentally solves the problems of implication of functional dependency and multi-valued dependency in XML data,laying a theoretical foundation for XML database design.

关键词： Extensible Markup Language inference rules functional dependency multi-valued dependency

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A novel photometric stereo method with nonisotropic point light sources 23

A novel photometric stereo method with nonisotropic point li...

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23rd International Conference on Pattern Recognition, ICPR 2016

作者： Nie, Ying Zhan, Song Guangdong Provincial Key Laboratory of Computer Vision and Virtual Reality Technology Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences China

ISBN: (纸本)9781509048472

This paper presents a photometric stereo method with nonisotropic point light sources. Subject to the non-uniform lighting conditions produced by the nonisotropic point sources, each incident light ray should be precisely determined so as to realize an accurate calculation of surface normal. In the proposed method, radiance model of the light source is firstly introduced to the classical photometric stereo framework. By considering the distance and angular attenuations of incident light rays, a precise description for the lighting field can be established. Based on the initial 3D reconstruction result, an iterative process is introduced to optimize the primary light model parameters with respect to the unknown distance factor. The experimental setup is quite simple, which only consists of some LEDs and one camera. And the experimental results show that, with the proposed method, accuracy of the reconstructed surface normal can be greatly improved in comparison with some conventional light models. © 2016 IEEE.

关键词： Light sources

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Automatic generation for penetration testing scheme analysis model for network

Automatic generation for penetration testing scheme analysis...

引用

2011 International Conference on Computational and Information Sciences, ICCIS 2011

作者： Shen, Lu Liang, Xiaoyan Bo, Yang Xia, Chunhe State Key Laboratory of Virtual Reality Technology and System School of Computer Science and Engineering Beihang University Beijing China

ISBN: (纸本)9780769545011

The existing penetration testing systems need to rely on the professional skills in the testing process, so they increase the penetration testing of human resources and costs. While it also reduces the efficiency of the test, it increases the test cycle. This paper presents a new penetration testing scheme by an automatically generated method. Through penetration testing scheme description, we establish an automatic generation system about penetration testing scheme, and the automatic generation penetration testing scheme for network analysis model (AGPTSAM) is established, and then the termination of the AGPTSAM is proved by the pushdown automaton. The prototype system of AGPTSAM is implemented. The penetration testing scheme could provide guidance and basis for the implementation of the penetration testing system, and shorten the test cycle and the human resources cost. This method is verification of effectiveness by experimental which works on the implementing platform. © 2011 IEEE.

关键词： Analytical models Automatica Generation Computational modeling Information security Penetration Testing Prototypes Scheme Testing

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Accelerate cache simulation with generic GPU

Accelerate cache simulation with generic GPU

引用

IEEE 9th International Conference on computer and Information technology, CIT 2009

作者： Han, Wan Xiaopeng, Gao Zhiqiang, Wang State Key Laboratory of Virtual Reality Technology and System School of Computer Science and Engineering Beihang University Beijing China

ISBN: (纸本)9780769538365

Trace-driven cache simulation is the most widely used method to evaluate different cache structures. Several techniques have been proposed to reduce the simulation time of sequential trace-driven simulation. An obvious way to achieve fast parallel simulation is to simulate the individual independent sets of a cache concurrently on different compute resources. We propose improvements to current trace-driven simulation methods to make them faster and more economical. This paper considers the use of generic GPU to accelerate cache simulation which exploits set-partitioning as the main source of parallelism. We develop more efficient parallel simulation techniques by introducing more knowledge into the Compute Unified Device Architecture (CUDA) on the GPU. Our experimental result shows that the new algorithm can produce performance results for a number of set-associative caches in just a single simulation run and still produce the exact results. © 2009 IEEE.

关键词： Graphics processing unit

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Network penetration testing scheme description language

Network penetration testing scheme description language

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2011 International Conference on Computational and Information Sciences, ICCIS 2011

作者： Dai, Zhiyong Lv, Liangshuang Liang, Xiaoyan Bo, Yang State Key Laboratory of Virtual Reality Technology and System School of Computer Science and Engineering Beihang University Beijing China

ISBN: (纸本)9780769545011

Penetration testing is widely used to help ensure the security of the network. Traditional penetration testings were manually performed by tester according to scheme, the process is usually complex resulting in that it is labor-intensive and requires tester to be familiar with all kind of tools. So it is very desirable to use a unified method to describe the scheme which can be identified by computer, then the computer can be used to substitute for tester to perform penetration testing. A new method is presented to describe penetration testing scheme. We propose a language for tester to describe the penetration testing scheme. Based on the conceptual model of penetration testing scheme we design the penetration testing scheme description language (PTSDL) and outline the important EBNF. PTSDL is declarative abstracting the process of penetration testing which makes this language flexible, extensible and adaptable to new penetration testing method. Use of this language is illustrated by an experimental study, which shows that the language can effectively describe the penetration testing scheme. © 2011 IEEE.

关键词： Testing

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Clustering based search algorithm for motion estimation

Clustering based search algorithm for motion estimation

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2012 13th IEEE International Conference on Multimedia and Expo, ICME 2012

作者： Chen, Ke Zhou, Zhong Wu, Wei State Key Laboratory of Virtual Reality Technology and Systems School of Computer Science and Engineering Beihang University Beijing China

ISBN: (纸本)9781467316590

Motion estimation is the key part of video compression since it removes the temporal redundancy within frames and significantly affects the encoding quality and efficiency. In this paper, a novel fast motion estimation algorithm named Clustering Based Search algorithm is proposed, which is the first to define the clustering feature of motion vectors in a sequence. The proposed algorithm periodically counts the motion vectors of past blocks to make progressive clustering statistics, and then utilizes the clusters as motion vector predictors for the following blocks. It is found to be much more efficient for one block to find the best-matched candidate with the predictors. Compared with the mainstream search algorithms, this algorithm is almost the most efficient one, 35 times faster in average than the full search algorithm, while its mean-square error is even competitively close to that of the full search algorithm. © 2012 IEEE.

关键词： Motion estimation

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