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visual communications and image processing 2004

The proceedings contain 68 papers from the Proceedings of SPIE - visual communications and image processing 2004: Part One. The topics discussed include: MPEG-4 advanced simple profile video encoding on an embedded multimedia system;novel algorithm to reduce the complexity of quarter-pixel motion estimation;layered Wyner-Ziv video coding;multiple motion and occlusion segmentation with a multiphase level set method;adaptive lossless video compression;coding-adaptive transforms and statistical motion prediction with drift.

关键词： image coding

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Proceedings of SPIE - visual communications and image processing 2004: Part Two

Proceedings of SPIE - Visual Communications and Image Proces...

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visual communications and image processing 2004

The proceedings contain 70 papers form the Proceedings of SPIE - visual communications and image processing 2004: Part Two. The topics discussed include: content-adaptive up-scaling of chrominance using classification of luminance and chrominance data;motion detection in color image sequence and shadow elimination;motion deblurring based on time-evolution of simultaneous nonlinear reaction-diffusion;multistage feature extraction for accurate face alignment and scalable texture-based video coding.

关键词： Face recognition

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Bibliometric Analysis of Road Distress Detection Based on Citespace 24

Bibliometric Analysis of Road Distress Detection Based on Ci...

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5th International Conference on Computer Science and Management Technology, ICCSMT 2024

作者： Li, Yaoye Zhang, Yinbo He, Rong Ma, Lianxia Chen, Fang Xinjiang communications Construction Group Co. Ltd. Xinjiang Urumqi China Xinjiang Key Laboratory of Transportation Prefabricated Construction and Maintenance Xinjiang Urumqi China Xinjiang University Xinjiang Urumqi China

ISBN: (纸本)9798400709999

To analyze the research progress in the field of road disease detection, this article searched the Web of Science Core Collection database for papers related to road disease detection from 2000 to *** CiteSpace software, a visual analysis was conducted on the 247 retrieved documents, focusing on annual publication numbers, publishing countries, core institutions and authors, keywords, burst words, and timeline mapping to explore the current status and trends in this *** findings indicate that since 2004, the overall research trend in road disease detection has been on an upward trajectory, with a notable increase in the number of research papers published in 2021, reflecting a significant surge in research ***, China, the United States, and Italy have been the most prolific in research *** leading research institutions are primarily scientific and technological academies, with Chang'an University taking a dominant position in the field of road disease *** keyword co-occurrence analysis, burst detection, and keyword clustering analysis, it was determined that disease detection technology, deep learning and machine learning, image processing and intelligent analysis, and system integration and development have been the research hotspots in the road disease detection field from 2000 to *** is anticipated that future research will evolve towards the directions of performance evaluation, multimodal data fusion, and real-time monitoring and analysis. © 2024 Copyright held by the owner/author(s). Publication rights licensed to ACM.

关键词： Data fusion

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Illumination compensation methods for automatic fiber connector inspection

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APPLIED OPTICS 2004年第6期43卷 1349-1354页

作者： Yang, YG Ciena Corp Linthicum Hts MD 21090 USA

Unevenly distributed image illumination is a problem in an automatic machine visual inspection system used for fiber connector defect detection. This unevenly distributed illumination makes it difficult to find an appropriate horizontal threshold to convert a gray-scale image to a binary image to separate surface defects, such as blobs and scratches, from the background of the connector. This paper proposes some effective methods to compensate the unevenly distributed illumination problem so that standard image processing methods can be used effectively to detect the defects of the fiber connectors. (C) 2004 Optical Society of America.

关键词： Fiber optic communications image quality image resolution LED sources Light intensity Nonlinear spatial filtering

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An overview of problems in image-based location awareness and navigation

An overview of problems in image-based location awareness an...

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Conference on visual communications and image processing 2004

作者： Lu, YH Delp, EJ Purdue Univ Sch Elect & Comp Engn W Lafayette IN 47907 USA

ISBN: (纸本)0819452114

In this paper we describe some of the research issues and challenges in image-based location awareness and navigation. We will describe two systems being developed at Purdue University as test beds for our ideas. The main system architecture combines image processing, mobility, wireless communication, and location awareness. We will describe two fundamental scenarios for using images to aid in mobile navigation problems. The first provides the ability to use a locally acquired image to determine the identity of an object, for example a building, as one roams in an area. The second problem is the use of images in a database to aid in vehicle navigation. The solution to these problems use location information, such as GPS signals, to compare and search location-annotated images in a database. We believe location information can improve the accuracy in image database search.

关键词： Databases Navigation systems Global Positioning System image transmission Cameras Roads image processing image storage Light sources and illumination visualization

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Adaptive lossless video compression

Adaptive lossless video compression

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Conference on visual communications and image processing 2004

作者： Park, SG Delp, EJ Purdue Univ Sch Elect & Comp Engn Video & Image Proc Lab W Lafayette IN 47907 USA

ISBN: (纸本)0819452114

In this paper, we describe a new lossless compression algorithm for color video sequences. Our approach is to exploit both spatial and temporal redundancies in the video sequence by developing a new adaptive algorithm. By adaptive selection between spatial and temporal prediction we show that our scheme is better than state-of-the-art lossless compression algorithms.

关键词： lossless video compression video compression predictive coding

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An investigation of implicit active contours for scientific image segmentation

An investigation of implicit active contours for scientific ...

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Conference on visual communications and image processing 2004

作者： Weeratunga, SK Kamath, C Lawrence Livermore Natl Lab Livermore CA 94551 USA

ISBN: (纸本)0819452114

The use of partial differential equations in image processing has become an active area of research in the last few years. In particular, active contours are being used for image segmentation, either explicitly as snakes, or implicitly through the level set approach. In this paper, we consider the use of the implicit active contour approach for segmenting scientific images of pollen grains obtained using a scanning electron microscope. Our goal is to better understand the pros and cons of these techniques and to compare them with the traditional approaches such as the Canny and SUSAN edge detectors. The preliminary results of our study show that the level set method is computationally expensive and requires the setting of several different parameters. However, it results in closed contours, which may be useful in separating objects from the background in an image.

关键词： level set implicit active contour image segmentation edge detection

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Moving object detection using orthogonal Gaussian-Hermite moments

Moving object detection using orthogonal Gaussian-Hermite mo...

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Conference on visual communications and image processing 2004

作者： Wu, YF Shen, J Univ Bordeaux 3 EGID F-33607 Pessac France

ISBN: (纸本)0819452114

In this paper, we analyze some properties of the orthogonal Gaussian-Hermite moments and propose a new method to detect the moving objects using the orthogonal Gaussian-Hermite moments. For the segmentation of moving objects in such moment images, we propose the fuzzy relaxation method (FRM) and 3D morphological relaxation method (3DMRM). The experiment results are reported, which show the robustness of our methods.

关键词： image sequence analysis orthogonal moments Gaussian-Hermite moments moving object detection image segmentation background subtraction 3D morphological relaxation

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Computation of discontinuous optical flow fields based on spatiotemporal bilateral filtering

Computation of discontinuous optical flow fields based on sp...

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Conference on visual communications and image processing 2004

作者： Feghali, R Vincent, A Commun Res Ctr Canada Ottawa ON Canada

ISBN: (纸本)0819452114

In this study, we propose a new multi-frame method to compute a smooth and boundary preserving optical flow estimate. The approach is based on the bilateral filtering, a fast edge preserving smoothing tool. Inspired by the variational origin of the bilateral filter, we construct an energy functional that takes into account the image brightness conservation constraint and the bilateral smoothness of the optical flow. Minimization of this energy functional is performed using the Gauss Seidel iterations. Experimental results on synthetic and real image sequences demonstrate that the proposed approach yields an optical flow that is smooth and yet motion boundary preserving.

关键词： bilateral filtering motion estimation optical flow spatio-temporal processing

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Pixel- and compressed-domain color matching techniques for video mosaic applications

Pixel- and compressed-domain color matching techniques for v...

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Conference on visual communications and image processing 2004

作者： Lee, MS Shen, MY Kuo, CCJ Univ So Calif Dept Elect Engn Los Angeles CA 90089 USA

ISBN: (纸本)0819452114

Several color matching algorithms are proposed to merge two or more video inputs of smaller sizes in to one single video output of a larger size with a wider field of view for the video mosaic application. The main challenge is to remove apparent seam lines between image boundaries. All developed algorithms share the same basic idea with different implementation details. That is, color differences between input images are first compensated using either histogram equalization or polynomial-based contrast stretching techniques. Then, a linear filtering technique is adopted to remove seam lines between image boundaries. The algorithms are developed in both the pixel and the DCT domains. The compressed-domain processing is attractive since it reduces the computational complexity. It is shown by experimental results that the color matching problem can be solved satisfactorily even in the compressed domain.

关键词： color matching video mosaic compressed domain processing DCT-domain processing

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