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An image Based Detection of Pedestrian Crossing

An Image Based Detection of Pedestrian Crossing

引用

congress on image and signal processing, CISP

作者： Yuzhen Cao Lushi Chen Shuo Jia Dept. of Biomedical Engineering Tianjin University Tianjin China

Safe traveling of the blind and vision-disabled people is a trouble in their daily lives. Pedestrian crossing area is an important traffic sign which should be recognized in the image-based blind aid devices. This paper proposes a method for extracting pedestrian crossing based on image processing, which contains bipolarity testing, morphological operations, edge detection and radon transform techniques. By introducing a parameter "bipolarity" which represents the gray level contrast in an image, areas with strong contrast were selected. Morphology processing approaches were used to analysis and process noises in bipolarity image. According to the corresponding relationships between an image and its radon transform result, pedestrian crossing features, such as number and edge of pedestrian crossing stripes were extracted in transform domain. This algorithm was proved to be effective with 96.2% accuracy under the test of 54 real crossing images.

关键词： image segmentation Pixel biomedical engineering image recognition image processing Testing Morphology Instruments Morphological operations image edge detection

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image Fusion Using an Improved Max-Lifting Scheme

Image Fusion Using an Improved Max-Lifting Scheme

引用

congress on image and signal processing, CISP

作者： Bo Yang Erkui Chen College of Information and Electrical Engineering Shandong University of Science and Technology Qingdao China

This paper presents a novel image fusion algorithm using an improved nonlinear wavelet-decomposition-scheme. The scheme is obtained by introducing redundancy in the max-lifting scheme. Experimental results based on real-world images show that the proposed algorithm produces good results in medical image fusion and visual-infrared image fusion; moreover, it is computationally efficient as a shift-invariant scheme.

关键词： image fusion Multilevel systems image reconstruction Wavelet coefficients Educational institutions biomedical imaging Wavelet transforms Intelligent sensors Layout Paper technology

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New Registration Method for Two-Dimensional Gel Electrophoresis images

New Registration Method for Two-Dimensional Gel Electrophore...

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international Conference on biomedical engineering and informatics (BMEI)

作者： Hua-Mei Xin Yuemin Zhu Lin Xue Robert Goutte Long-Fei Wu College of Physics and Electronics Shandong Normal University Jinan China Centre of Research and Application Imaging and Signal Processing CNRS UMR 5220 Inserm U630 INSA of Lyon University of Lyon I Villeurbanne France Laboratory of Bacterial Chemistry CNRS UPR 9043 Marseilles France

ISBN: (纸本)9781424441327

Two-dimensional gel electrophoresis (2DGE) images are extremely useful support for proteins analysis in the field of proteomics. The registration of 2DGE images is an important element for protein identification in biological research while it is a complex and difficult problem. This paper proposes a new non-linear registration approach for 2DGE images, which is based on the exploitation of both spot distance measure and spot intensity. The method consists of three steps: multi-resolution affine registration, spot pairing, and thin-plate spline interpolation. The results on both simulated and real gel images show that the proposed method significantly improves registration accuracy in comparison with traditional registration techniques and has promising use in practical gel image analysis systems in proteomics.

关键词： Electrokinetics Proteins Spline image analysis Multiresolution analysis Interpolation Proteomics Educational institutions Physics biomedical signal processing

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Contour Correction Liver Cancer CT image Segmentation Method Based on Snake Model

Contour Correction Liver Cancer CT Image Segmentation Method...

引用

congress on image and signal processing, CISP

作者： Jian-hua Liu Rui Zhang Jian-wei Wang Department of Information Engineering North China University of Water Conservancy and Electric Power Zhengzhou China Department of information Engineering NCWU Zhengzhou P.R. China

To segment CT (computed tomography) images of liver cancer effectively, a new method based on Snake model was proposed. image segmentation based on threshold was combined with image segmentation based on Snake model, and a contour correction process was added. This method obtains a better result on liver cancer CT images segmentation, overcomes the defect that traditional Snake model can not segment the images with serious depressions. The results of the experiment demonstrate that this algorithm is an effective method for segmenting the liver cancer image.

关键词： Liver Cancer Computed tomography image segmentation biomedical imaging Medical diagnostic imaging image converters Forward contracts Power engineering and energy Water conservation

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Combinatorial Ricci Curvature and Laplacians for image processing

Combinatorial Ricci Curvature and Laplacians for Image Proce...

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congress on image and signal processing, CISP

作者： Emil Saucan Gershon Wolansky Eli Appleboim Yehoshua Y. Zeevi Department of Mathematics Technion-Israel Institute of Technology Haifa Israel Electrical Engineering Department Technion-Israel Institute of Technology Haifa Israel

A new Combinatorial Ricci curvature and Laplacian operators for grayscale images are introduced and tested on 2D synthetic, natural and medical images. The effectiveness of the notions introduced herein, as compared with more classical methods, is shown by a variety of experimental results. Analogue formulae for voxels are also obtained. This novel approach is based upon more general concepts developed by R. Forman. Further applications, in particular a fitting Ricci flow, are discussed.

关键词： Laplace equations image processing Gray-scale Solids Ultrasonic imaging Mathematics Medical tests biomedical imaging image analysis Computer graphics

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Dilution of Precision and Clock of Simulated Pseudolites Augmented GPS signals

Dilution of Precision and Clock of Simulated Pseudolites Aug...

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congress on image and signal processing, CISP

作者： Chang-hui Xu Jian Wang Jing-xiang Gao Anbing Zhang School of Environment and Spatial Informatics China University of Mining and Technology Xuzhou China School of Resource Hebei University of Engineering Handan China

To improve insufficiently available satellite and solve the anomaly geometry, normal GPS system and its mentioned drawbacks are simulated. Based on the analysis of anomaly examples, singular value decomposition (SVD) is applied to settle the anomaly and its effect on precision is investigated. Then pseudolites with proper geometry are laid to increase the number of measurements and advance the geometry to compare with the only GPS normal and anomaly system. The results show that added pseudolites not only solve the problem of no or not good navigation and position solution without enough available measurements, but resolve the lower precision and clock bias because of the anomaly geometry to obtain the required dilution of precision and right clock value.

关键词： Clocks Global Positioning System Satellite navigation systems Solid modeling Monitoring Cities and towns informatics Information geometry Singular value decomposition Position measurement

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Content-Based Retrieval System for X-Ray images

Content-Based Retrieval System for X-Ray Images

引用

congress on image and signal processing, CISP

作者： Ivica Dimitrovski Suzana Loskovska Department of Computer Science and Computer Engineering Faculty of Electrical Engineering and Information Technologies Skopje Macedonia

In this paper, we present an overview and experimental comparison of a large number of image descriptors for content-based retrieval of X-ray images. The paper concludes with recommendations which descriptors are most suitable for content-based retrieval of X-ray images. The local features invariant to scale, translation and rotation give best results. The features were integrated in content-based retrieval system for X-ray images. The system supports querying by image to find visually similar images to presented query. To employ multiple visual features to characterize image content we developed simple feature aggregation scheme.

关键词： image retrieval Content based retrieval X-ray imaging Information retrieval biomedical imaging Positron emission tomography image storage Indexing Computed tomography Magnetic resonance imaging

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Fast image Segmentation Based on Single-Parametric Level-Set Approach

Fast Image Segmentation Based on Single-Parametric Level-Set...

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congress on image and signal processing, CISP

作者： Qiang-Jun Xie Hua-Rong Zhang Institute of Applied Mathematics and Engineering Computation Hangzhou Dianzi University Hangzhou China School of Science China Jiliang University Hangzhou China

An improved level set framework for fast segmentation based on single parameter is presented. The traditional level set methods for image segmentation need inevitably too many parameters adjustment and they have usually lower computationally implementation. To solve this problem, the proposed method improves the C-V PDE model by adding a penalized energy term and replacing the dirac function with the norm of level set function gradient. Besides, only the parameter of the length term is reserved in the model and an evolution criterion is introduced for the value rules of this single parameter. The experimental results of synthesized and biomedical images show that the new method is faster and more robust. Moreover, the new method has more extensive adaptability on account of the zero level set function being set anyplace freely and the single parameter adjustment convenience.

关键词： image segmentation Level set Capacitance-voltage characteristics biomedical imaging Mathematics Robustness image processing Partial differential equations Finite difference methods Narrowband

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A signal processing System Used in Digital Ophthalmology Ultrasonography

A Signal Processing System Used in Digital Ophthalmology Ult...

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congress on image and signal processing, CISP

作者： Sheng Zhou Xiaochun Wang Yanqun Wang Jun Yang Biomedical Engineering Institute Chinese Academy of Medical Sciences Tianjin China

Objective to develop a signal processing system based on FPGA used in digital ophthalmology ultrasongraphy to process echo signals. Methods main signal processing technique used in the system includes interpolation, dynamic filter, TGC, envelop demodulation and logarithmic amplifier. In FPGA, a schematic file acts as the top module, and hardware describe language VHDL act as bottom modules. Results By building a physical simulation model, the validity of each phases in signal processing of the system has been validated. By detecting normal human eyes and orbits, the echo signals gained are all right. Conclusion The system has good ability to process high frequency ultrasonic echo signals of ophthalmology in real time. It has reached design demands, and shows a good application prospect.

关键词： Digital signal processing Ultrasonography signal processing Field programmable gate arrays Interpolation Filters Demodulation Hardware Humans Eyes

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The Calibration Methods of Coil Sensitivity for Parallel Imaging

The Calibration Methods of Coil Sensitivity for Parallel Ima...

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congress on image and signal processing, CISP

作者： XiaoFang Liu XiuZi Ye HuiJuan Lu Dept. of Biomed. Eng. China JiLiang Univ. Hangzhou China Coll. of Comput. Sci. & Technol. Zhejiang Univ. Hangzhou China Inst. of Inf. Eng. China JiLiang Univ. Hangzhou China

The coil sensitivity distribution is one of the most essential elements of any parallel imaging methods, which provides the spatial information for unfolding the aliased images due to under sampling. In general, there are two basic calibration methods to obtain the coil information: pre-scan and autocalibration. In this paper, the standard and advanced calibrating methods for coil sensitivity estimation are firstly reviewed. Secondly, in vivo applications of the up-to date methods are accomplished. Finally, the problems of these calibration methods are post. At last, the paper has outlined the practical considerations of the calibration techniques.

关键词： Calibration Coils Polynomials biomedical imaging biomedical engineering In vivo Encoding image reconstruction Educational institutions Computer science

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