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Boosted sigma set for pedestrian detection

Boosted sigma set for pedestrian detection

引用

International Conference on Pattern Recognition

作者： Hong, Xiaopeng Chang, Hong Chen, Xilin Gao, Wen School of Computer Science and Technology Harbin Institute of Technology China Key Lab. of Intelligent Information Processing Chinese Academy of Sciences Institute of Computing Technology China Institute of Digital Media Peking University China

ISBN: (纸本)9780769541099

This paper presents a new method to detect pedestrian in still image using Sigma sets as image region descriptors in the boosting framework. Sigma set encodes second order statistics of an image region implicitly in the form of a point set. Compared with the covariance matrix, the traditional second order statistics based region descriptor, which requires computationally demanding operations based on Riemannian manifold, Sigma set preserves similar robustness and discriminative power more efficiently because the classification on Sigma sets can be directly performed in vector space. Experimental results on the INRIA and the Daimler Chrysler pedestrian datasets show the effectiveness and efficiency of the proposed method. © 2010 IEEE.

关键词： Covariance matrix

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A sample pre-mapping method enhancing boosting for object detection

A sample pre-mapping method enhancing boosting for object de...

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International Conference on Pattern Recognition

作者： Ren, Haoyu Hong, Xiaopeng Heng, Cher-Keng Liang, Luhong Chen, Xilin Key Lab. of Intelligent Information Processing of Chinese Academy of Sciences Institute of Computing Technology CAS China School of Computer Science and Technology Harbin Institute of Technology Panasonic Singapore Laboratories Pte Ltd.

ISBN: (纸本)9780769541099

We propose a novel method to improve the training efficiency and accuracy of boosted classifiers for object detection. The key step of the proposed method is a sample pre-mapping on original space by referring to the selected 'reference sample' before feeding into weak classifiers. The reference sample corresponds to an approximation of the optimal separating hyper-plane in an implicit high-dimensional space, so that the resulting classifier could achieve the performance similar to kernel method, while spending the computation cost of linear classifier in both training and detection. We employ two different non-linear mappings to verify the proposed method under boosting framework. Experimental results show that the proposed approach achieves performance comparable with the common-used methods on public datasets in both pedestrian detection and car detection. © 2010 IEEE.

关键词： Object detection

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Skin color weighted disparity competition for hand segmentation from stereo camera

Skin color weighted disparity competition for hand segmentat...

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2010 21st British Machine Vision Conference, BMVC 2010

作者： Wang, Qi Chen, Xilin Gao, Wen Key Lab. of Intelligent Information Processing Institute of Computing Technology Chinese Academy of Sciences Beijing China Institute of Digital Media School of EE and CS Peking University Beijing China

ISBN: (纸本)1901725405

Hand segmentation is the basis of many vision-based hand gesture applications in human computer interaction (HCI). This paper proposes a novel method of skin color weighted disparity competition to incorporate the skin color and depth cues for hand segmentation in clutter environment from stereo camera. The basic idea is that the hand disparity will be apparently different from most of the background disparities. Note that we refer to the scene except the user as the background. The proposed method validates a hand pixel by verifying whether the pixel satisfies the disparity limit of the hand more than of the background. Its novelty lies in incorporating the skin color probability to weight the disparity competition to improve the robustness of validation and the accuracy of boundary location. Experiments demonstrate the efficiency of the proposed method. © 2010. The copyright of this document resides with its authors.

关键词： Pixels

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Machine translation with lattices and forests

Machine translation with lattices and forests

引用

23rd International Conference on Computational Linguistics, Coling 2010

作者： Mi, Haitao Huang, Liang Liu, Qun Key Lab. of Intelligent Information Processing Institute of Computing Technology Chinese Academy of Sciences China Information Sciences Institute Viterbi School of Engineering University of Southern California United States

Traditional 1-best translation pipelines suffer a major drawback: the errors of 1- best outputs, inevitably introduced by each module, will propagate and accumulate along the pipeline. In order to alleviate this problem, we use compact structures, lattice and forest, in each module instead of 1-best results. We integrate both lattice and forest into a single tree-to-string system, and explore the algorithms of lattice parsing, lattice-forest-based rule extraction and decoding. More importantly, our model takes into account all the probabilities of different steps, such as segmentation, parsing, and translation. The main advantage of our model is that we can make global decision to search for the best segmentation, parse-tree and translation in one step. Medium-scale experiments show an improvement of +0.9 BLEU points over a state-of-the-art forest-based baseline.

关键词： Pipelines

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From use case model to service model: An environment ontology based approach

From use case model to service model: An environment ontolog...

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International Conference on Grid and Cloud computing

作者： Zhao, Bin Cai, Guangjun Jin, Zhi Key Lab. of Intelligent Information Processing Institute of Computing Technology CAS Graduate University of the Chinese Academy of Sciences Beijing China Software Engineering Institute Peking University Beijing China

ISBN: (纸本)9780769543130

One fundamental problem in services computing is how to bridge the gap between business requirements and various heterogeneous IT services. This involves eliciting business requirements and building a solution accordingly by reusing availab.e services. While the business requirements are commonly elicited through use cases and scenarios, it is not straightforward to transform the use case model into a service model, and the existing manual approach is cumbersome and error-prone. In this paper, the environment ontology, which is used to model the problem space, is utilized to facilitate the model transformation process. The environment ontology provides a common understanding between business analysts and software engineers. The required software functionalities as well as the availab.e services' capabilities are described using this ontology. By semi-automatically matching the required capability of each use case to the availab.e capabilities provides by services, a use case is realized by that set of services. At the end of this paper, a fictitious case study was used to illustrate how this approach works. © 2010 IEEE.

关键词： Ontology

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Forest-based semantic role lab.ling

Forest-based semantic role labeling

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作者： Xiong, Hao Mi, Haitao Liu, Yang Liu, Qun Key Lab. of Intelligent Information Processing Institute of Computing Technology Chinese Academy of Sciences P.O. Box 2704 Beijing 100190 China

ISBN: (纸本)9781577354659

Parsing plays an important role in semantic role lab.ling (SRL) because most SRL systems infer semantic relations from I-best parses. Therefore, parsing errors inevitably lead to lab.ling mistakes. To alleviate this problem, we propose to use packed forest, which compactly encodes all parses for a sentence. We design an algorithm to exploit exponentially many parses to learn semantic relations efficiently. Experimental results on the CoNLL-2005 shared task show that using forests achieves an absolute improvement of 1.2% in terms of Fi score over using 1-best parses and 0.6% over using 50-best parses. Copyright © 2010, Association for the Advancement of Artificial Intelligence (***). All rights reserved.

关键词： Semantics

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Counter designs in quantum-dot cellular automata

Counter designs in quantum-dot cellular automata

引用

2010 10th IEEE Conference on Nanotechnology, NANO 2010

作者： Kong, Kun Shang, Yun Lu, Ruqian Institute of Mathematics Academy of Mathematics and Systems Science CAS Beijing 100190 China Shanghai Key Lab. of Intelligent Information Processing Fudan University Shanghai 200433 China CAS Key Lab. of IIP Institute of Computing Technology CAS Beijing 100190 China

ISBN: (纸本)9781424470334

In this paper, we present a new method for the design of an n-bit synchronous binary up counter in quantum-dot cellular automata (QCA). This method is based on the JK flip-flop which almost always produces the simplest combinational logic in traditional sequential circuits. We implement a new QCA architecture for the JK flip-flop. Compared to the existing QCA JK flip-flop, the majority gate count, cell count, clock cycle count, and area of our QCA JK flip-flop are reduced by 57.1%, 88.1%, 55.6%, and 92.0%, respectively. Based on our QCA JK flip-flop, a method of extending state cells is proposed to design the QCA layout of the n-bit counter, such that all the clock cycle counts between any two state cells become 1. This feature can ensure that one count just takes one clock cycle, in existing methods, however, one count needs to take n-1 clock cycles. Comparisons indicate that, by applying our method, the hardware requirements (i.e., complexity and area) for QCA n-bit counter can be greatly reduced. ©2010 IEEE.

关键词： Design

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Memory matrix: A novel user experience for home video

Memory matrix: A novel user experience for home video

引用

18th ACM International Conference on Multimedia ACM Multimedia 2010, MM'10

作者： Xu, Qianqian Wu, Zhipeng Li, Guorong Qin, Lei Jiang, Shuqiang Huang, Qingming Graduate University Chinese Academy of Sciences Beijing 100049 China Key Lab. of Intell. Info. Process Chinese Academy of Sciences Beijing 100190 China Institute of Computing Technology Chinese Academy of Sciences Beijing 100190 China

ISBN: (纸本)9781605589336

Nowadays, various efforts have sprung up aiming to automatically analyze home videos and provide users satisfactory experiences. In this paper, we present a novel user experience for home video called Memory Matrix, which could facilitate users to re-experience the joy of their memories, travelling along not only the time axis but also the space axis. In other words, the video clips (sub-shots) are organized both by taken times and taken locations, which further allows the user to browse home videos taken at similar locations. Moreover, given a specific query in Memory Matrix (row, column), it can also provide the user optional summaries along the time axis or space axis. The summarization scheme in this paper is based on a top-down interest score generation algorithm which automatically propagates the pre-lab.led video level interest scores to sub-shot level interest scores. Firstly, the user is asked to provide interest scores to all the video sequences in the home video collection. Then, the video sequences are decomposed into sub-shots which are represented by keyframes. Consequently, we employ multi-scale spatial saliency analysis to remove the foregrounds and model the background scenes based on histogram of visual words. Finally, the interest scores are propagated from video level to sub-shot level by using gradient descent algorithm. Experimental results demonstrate the effectiveness, efficiency, and robustness of our framework. © 2010 ACM.

关键词： Video recording

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Efficient incremental decoding for tree-to-string translation

Efficient incremental decoding for tree-to-string translatio...

引用

Conference on Empirical Methods in Natural Language processing, EMNLP 2010

作者： Huang, Liang Mi, Haitao Information Sciences Institute University of Southern California 4676 Admiralty Way Marina del Rey CA 90292 United States Key Lab. of Intelligent Information Processing Institute of Computing Technology Chinese Academy of Sciences P.O. Box 2704 Beijing 100190 China

ISBN: (纸本)1932432868

Syntax-based translation models should in principle be efficient with polynomially-sized search space, but in practice they are often embarassingly slow, partly due to the cost of language model integration. In this paper we borrow from phrase-based decoding the idea to generate a translation incrementally left-to-right, and show that for tree-to-string models, with a clever encoding of derivation history, this method runs in average-case polynomial-time in theory, and linear-time with beam search in practice (whereas phrase-based decoding is exponential-time in theory and quadratic-time in practice). Experiments show that, with comparable translation quality, our tree-to-string system (in Python) can run more than 30 times faster than the phrase-based system Moses (in C++). © 2010 Association for Computational Linguistics.

关键词： Decoding

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From Use Case Model to Service Model An Environment Ontology Based Approach

From Use Case Model to Service Model An Environment Ontology...

引用

The Ninth International Conference on Grid and Cloud computing(第九届网格与云计算国际学术会议 GCC 2010)

作者： Guangjun Cai Bin Zhao Zhi Jin Key Lab. of Intelligent Information Processing Institute of Computing Technology CAS Graduate Unive Software Engineering Institute Peking University Beijing China

One fundamental problem in services computing is how to bridge the gap between business requirements and various heterogeneous IT services. This involves eliciting business requirements and building a solution accordingly by reusing availab.e services. While the business requirements are commonly elicited through use cases and scenarios, it is not straightforward to transform the use case model into a service model, and the existing manual approach is cumbersome and error-prone. In this paper, the environment ontology, which is used to model the problem space, is utilized to facilitate the model transformation process. The environment ontology provides a common understanding between business analysts and software engineers. The required software functionalities as well as the availab.e services’ capabilities are described using this ontology. By semi-automatically matching the required capability of each use case to the availab.e capabilities provides by services, a use case is realized by that set of services. At the end of this paper, a fictitious case study was used to illustrate how this approach works.

关键词： services computing requirements engineering use case environment ontology service model

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