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检索条件"任意字段=Conference on Visual Information Processing VI"

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Integration of speech and vision using mutual information 25

Integration of speech and vision using mutual information

引用

IEEE International conference on Acoustics, Speech, and Signal processing

作者： Roy, D MIT Media Lab Cambridge MA 02139 USA

ISBN: (纸本)0780362934

We are developing a system which learns words from co-occurring spoken and visual input. The goal is to automatically segment continuous speech at word boundaries without a lexicon, and to form visual categories which correspond to spoken words. Mutual information is used to integrate acoustic and visual distance metrics in order to extract an audio-visual lexicon from raw input. We report results of experiments with a corpus of infant-directed speech and images.

关键词： Speech Dictionaries as Topic distance metric Continuous speech visualization Acoustics Word AUTOMATIC information

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video pre-processing with JND-based Gaussian filtering of superpixels 6

Video pre-processing with JND-based Gaussian filtering of su...

引用

conference on visual information processing and Communication vi

作者： Ding, Lei Li, Ge Wang, Ronggang Wang, Wenmin Peking Univ Shenzhen Grad Sch Sch Elect & Comp Engn Beijing Peoples R China

ISBN: (纸本)9781628415001

In this paper, an innovative method of HEVC video pre-processing is proposed. The method applies a simple linear iterative clustering (SLIC), which adapts a k-means clustering to group pixels into perceptually meaningful atomic regions of superpixels. By calculating the average of weighted average of luminance differences around each pixel in the superpixel, a suitable parameter of Gaussian filter for the superpixel is determined. Experimental results show that bit rate can be reduced up to 29% without loss in visual quality.

关键词： HEVC JND superpixel video pre-processing Gaussian filtering

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A New Robust Method for Two-Dimensional Inverse Filtering 6

A New Robust Method for Two-Dimensional Inverse Filtering

引用

conference on visual information processing and Communication vi

作者： Fuller, Megan M. Lim, Jae S. MIT Dept Elect Engn & Comp Sci Elect Res Lab Cambridge MA 02139 USA

ISBN: (纸本)9781628415001

In this paper, we present a novel method for inverse filtering a two dimensional (2-D) signal using phase-based processing techniques. A 2-D sequence can be represented by a sufficient number of samples of the phase of its Fourier transform and its region of support. This is exploited to perform deconvolution. We examine the effects of additive noise and incomplete knowledge of the point spread function on the performance of this deconvolution method and compare it with other 2-D deconvolution methods. The problem of finding the region of support will also be briefly addressed. Finally, an application example will be presented.

关键词： inverse filtering deconvolution phase-based processing

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video scouting: An architecture and, system for the integration of multimedia information in personal TV applications

Video scouting: An architecture and, system for the integrat...

引用

IEEE International conference on Acoustics, Speech, and Signal processing

作者： Jasinschi, RS Dimitrova, N McGee, T Agnihotri, L Zimmerman, J Philips Res Briarcliff Manor NY 10510 USA

ISBN: (纸本)0780370414

Currently available Personal video Recorders find and store whole TV programs. Our system, video Scouting, not only finds and stores programs;it automatically segments and indexes story segments from the programs according to viewers' profiles. The extracted descriptions serve the viewers' content information requests for program segment selection, e.g. play the three minute interview with Hillary Clinton. To achieve this, the system combines information from the audio, visual, and transcript domains in a probabilistic framework based on Bayesian networks. In this paper we describe the overall architecture, a system implementation, and discuss some experimental results.

关键词： Image retrieval

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Speed-up keypoint mapping technique by multi-resolution and global information 6

Speed-up keypoint mapping technique by multi-resolution and ...

引用

conference on visual information processing and Communication vi

作者： Qiao, Wei Li, Yong Jin, Hongbin Wen, Zhigang Beijing Univ Posts & Telecommun Beijing Peoples R China

ISBN: (纸本)9781628415001

This work deals with the problem of high computation complexity in image registration. A hierarchical multiresolution strategy is utilized to speed up the processing of SIFT by starting on a low resolution octave. The initial affine transformation model will be achieved. In subsequent multiresolution octaves, we apply the transformation affine model getting from upper octave to current octave, then, combined with geometrical distribution of matched keypoints to further remove incorrect mappings and update affine transformation model. The strategy ends with the best affine transformation model on the bottom octave(full-size image). Experimental results show that the proposed method can achieve comparative accuracy with less computational than original SIFT.

关键词： Multiresolution image registration hierarchical strategy

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Semantic indexing of sports program sequences by audio-visual analysis

Semantic indexing of sports program sequences by audio-visua...

引用

IEEE International conference on Image processing

作者： Leonardi, R Migliorati, P Prandini, M Univ Brescia DEA I-25121 Brescia Italy

ISBN: (纸本)0780377508

Semantic indexing of sports videos is a subject of great interest to researchers working on multimedia content characterization. Sports programs appeal to large audiences and their efficient distribution over various networks should contribute to widespread usage of multimedia services. In this paper, we propose a semantic indexing algorithm for soccer programs which uses both audio and visual information for content characterization. The video signal is processed first by extracting low-level visual descriptors from the MPEG compressed bit-stream. The temporal evolution of these descriptors during a semantic event is supposed to be governed by a controlled Markov chain. This allows to determine a list of those video segments where a semantic event of interest is likely to be found. based on the maximum likelihood criterion. The audio information is then used to refine the results of the video classification procedure by ranking the candidate video segments in the list so that the segments associated to the event of interest appear vi the very first positions of the ordered list. The proposed method is applied to goal detection. Experimental results show the effectiveness of the proposed cross-modal approach.

关键词： video signal processing

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Depth information on moving objects using stereo vision

Depth information on moving objects using stereo vision

引用

conference on visual information processing vi

作者： Choy, I Sin, YG Park, JG Dongshin College (South Korea) Chosun Univ. (South Korea)

ISBN: (纸本)0819424897

In stereo vision, depth information is one of the important parameters to understand the real world. One method for extracting such depth information is based on the geometry of stereo vision using two cameras displaced from each other by a baseline distance. In tills paper, we show an improved triangulation method based on stereo vision angles. We setup a stereo vision system which extracts the distance to the object by detecting moving objects using difference image and by obtaining depth information using the improved triangulation method. It has been implemented employing a TMS320C30 DSP board in a stereo vision system. As a result of experiment, the proposed vision system has the accuracy of 0.2mm in the range of 400mm.

关键词： triangular method stereo vision angles difference method depth information

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The use of temporal speech and lip information for multi-modal speaker identification via multi-stream HMM's 25

The use of temporal speech and lip information for multi-mod...

引用

IEEE International conference on Acoustics, Speech, and Signal processing

作者： Wark, T Sridharan, S Chandran, V Queensland Univ Technol Sch Elect Elect & Syst Engn RCSAVT Speech Res Lab Brisbane Qld 4001 Australia

ISBN: (纸本)0780362934

This paper investigates the use of temporal lip information, in conjunction with speech information, for robust, text-dependent speaker identification. We propose that significant speaker-dependent information can be obtained from moving lips, enabling speaker recognition systems to be highly robust in the presence of noise. The fusion structure for the audio and visual information is based around the use of multi-stream hidden Markov models (MSHMM), with audio and visual features forming the two independent data streams. Recent work with multi-modal MSHMM's has been performed successfully for the task of speech recognition. The use of temporal lip information for speaker identification has been performed previously, however this has been restricted to output fusion via single-stream HMM's. We present an extension to this previous work, and show that a MSHMM is a valid structure for multi-modal speaker identification.

关键词： Speech recognition

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Image order statistics filtering procedures in presence of complex noise

Image order statistics filtering procedures in presence of c...

引用

conference on visual information processing XI

作者： Ponomaryov, vi Funes, FJG de Rivera, LN UP Culhuacan Mech & Elect Engn Higher Sch Natl Polytechn Inst Mexico Mexico City 04430 DF Mexico

ISBN: (纸本)0819444863

In this paper, we present the real-time implementation of image filtering for impulse and mixture of impulsive and multiplicative noise removal with detail preservation by means of use of DSP TMS320C6701. The filtering scheme is given for two filters connected in cascade. In the first stage, we use the MM-KNN (Median M-type K-Nearest Neighbor) filter to provide detail preservation and impulsive noise rejection. The second stage is proposed to use an M filter to provide multiplicative noise suppression. We use different types of influence functions in the M-estimator to provide better noise suppression. Extensive simulation results demonstrate that the proposed filter consistently outperforms other filters by balancing the tradeoff between noise suppression and detail preservation.

关键词： Order Statistics Filters MM-KNN filters DSP TMS320C6701

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Two-stage robust rank filter with fine detail preserving for the image processing

Two-stage robust rank filter with fine detail preserving for...

引用

10th visual information processing conference

作者： Ponomaryov, vi Funes, FJG Pogrebnyak, OB de Rivera, LN Inst Politecn Nacl ESMIE UP Culhuacan Mexico City DF Mexico

ISBN: (纸本)0819440833

In this paper, we present implementation of the robust RM-estimators with different influence functions such as the cut median (skipped median) function and Hampel function. We obtained that use of these functions in the RM algorithms demonstrated better robustness in comparison with the simplest cut median function. Applications of these functions in filtering procedures provide the preservation of fine details, impulsive noise removal and suppression of the multiplicative noise. The implementation of the cut median and Hampel functions in the RM-KNN filter has shown that its use is a good tool for preservation of fine details and suppression of noise by means of use DSP TMS320C6701. The deterministic and statistical properties of the designed filters have been investigated and shown their effectiveness. The optimal values for parameters of these filters for different noise mixture are presented in this paper. Finally, DSP implementation has demonstrated that in the case of use the simplest cut median the time of processing is less than in the case of applications the cut median and Hampel functions, but noise suppression is better when cut median or Hampel functions were applied.

关键词： robust rank filter RM estimators detail preserving filters DSP TMS320C6701

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