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检索条件"任意字段=International Congress on Image and Signal Processing, BioMedical Engineering and Informatics"

共 2040 条记录，以下是1541-1550 订阅

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A novel least Cauchy error algorithm and its kernel extension

A novel least Cauchy error algorithm and its kernel extensio...

引用

international congress on image and signal processing, biomedical engineering and informatics (CISP-BMEI)

作者： Lujuan Dang Yunfei Zheng Shiyuan Wang Wanli Wang Qitang Sun College of Electronic and Information Engineering Southwest University Chongqing

ISBN: (纸本)9781509037117

Cauchy estimator has been successfully applied to the statistical learning owing to its unique distribution characteristics and robustness to outliers. In this paper, Cauchy loss function is utilized to update the weight of filter, generating a novel robust least Cauchy error (LCE) algorithm and its kernel extension (KLCE). The proposed filter algorithms are effective for the impulsive non-Gaussian noises (e.g.,α-stable noise), and can achieve a fine accuracy for filter. Simulations on the system identification and nonlinear channel equalization confirm that the proposed filters based on Cauchy cost function show strong robustness against large outliers.

关键词： Kernel Robustness Convergence signal processing algorithms Cost function Computational modeling Steady-state

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image Sharpness Evaluation Based On Visual Importance

Image Sharpness Evaluation Based On Visual Importance

引用

international congress on image and signal processing, biomedical engineering and informatics

作者： Yafeng Li Ying Lin School of Computer Communication University of China Dept. Digital Library System Beijing Normal University

ISBN: (纸本)9781509037117

This paper describes a method of image sharpness evaluation while taking into account the photographer's aesthetic intention. The main idea is utilizing a visual importance map that estimates the weight of each pixel to guild evaluating image sharpness. The visual importance map is computed automatically with a saliency detection algorithm based on global color contrast. Our technique allows to treat pixels in an image differently based on their content, such that the perceptually important features and photograph's subjective intention can be reflected in the result. The proposed method is validated by experiment on public data set.

关键词： saliency detection image quality assessment sharpness evaluation photography aesthetics

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Design of a Low Noise Low Power Preamplifier used for Portable biomedical signal Acquisition

Design of a Low Noise Low Power Preamplifier used for Portab...

引用

international congress on image and signal processing, biomedical engineering and informatics

作者： Yali Su Xuan Liu School of Mechanical Engineering Xi'an Shiyou University China School of Microelectronics Xi'an Jiaotong University China

ISBN: (纸本)9781509037117

A low noise preamplifier used for biomedical signal acquisition is presented in the paper. A "T-type feedback" operational amplifier topology structure is used here based on the traditional "AC coupling-capacitor feedback". The resulting amplifier, built in SMIC 0.18um standard CMOS process, processes signals from 0.2/25Hz to 10 kHz with an input-referred noise of 0.96uVrms and a power dissipation of 18.54uW while occupying 0.065mm~2 of chip area. The simulation results show that, the presented preamplifier has proper gain and bandwidth, small input-referred noise and chip area consumption. It is suitable for the applications in low power, low noise and high integration circuits used for biomedical signal acquisition.

关键词： low power biomedical signal preamplifier low noise

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Improve signal Peptide Prediction by Using Functional Domain Information

Improve Signal Peptide Prediction by Using Functional Domain...

引用

international congress on image and signal processing, biomedical engineering and informatics

作者： Yi-Ze Zhang Hong-Bin Shen Institute of Image Processing and Pattern Recognition Shanghai Jiao Tong University

ISBN: (纸本)9781509037117

signal peptides are significant important in targeting the translocation of integral membrane proteins and secretory proteins. Due the high similarity between the transmembrane helices and signal peptides, classifiers have limit ability to discriminate the signal peptides from the transmembrane helices. To solve this problem, the protein functional domain information is applied in this method. For accurately identify the cleavage sites along the sequence, a subset of potential cleavage sites was firstly screened out by statistical machine learning rules, and then the final unique site was picked out according to its evolution conservation score. This method has been benchmarked on multiple datasets and the experimental results have shown its superiority.

关键词： Sequence evolution signal peptide N-terminal transmembrane helix Functional domain

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Local feature extraction and recognition under expression variations based on multimodal face and ear spherical map

Local feature extraction and recognition under expression va...

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international congress on image and signal processing, biomedical engineering and informatics (CISP-BMEI)

作者： Yihang Li Zhichun Mu Tingting Zhang School of Automation and Electrical Engineering University of Science and Technology Beijing Beijing China

ISBN: (纸本)9781509037117

In unconstrained scenes, the change of expression and pose may lead to mismatching of the human face and ear images, and the recognition rate may also decrease. A method fusing depth and texture information is proposed to deal with the problem. We employ different recognition strategies based on the different characteristics of the spherical depth map and the spherical texture map. The learning to rank approach is applied to select the key points of high repeatability and stability. An improved SIFT method and a LBP-like algorithm are applied in the following process. Sparse representation is used for recognition and then Bayesian decision-level fusion for the improvement of final results. And the experiments prove the effectiveness of our approach evaluated on MARS map.

关键词： Face Feature extraction Three-dimensional displays Face recognition Ear image recognition image reconstruction

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A detection algorithm of ballast track fastener loss based on shooting direction

A detection algorithm of ballast track fastener loss based o...

引用

international congress on image and signal processing, biomedical engineering and informatics (CISP-BMEI)

作者： Mingyu Wang Xinfeng Zhang College of Electronic and Control Engineering Beijing University of Technology Beijing China Beijing Laboratory For Urban Mass Transit Beijing China Engineering Research Center of Digital Community Ministry of Education Beijing China

ISBN: (纸本)9781509037117

In this paper, we propose a new positioning and automatic detection algorithm of ballast track fastener missing, which is based on different shooting direction. The crossover method based on Fast-Kirsch edge detection arithmetic and HOUGH straight line detection is presented for the direction-based positioning algorithm. It has very strong transplantability without the effect of shadow, inclination of track, obstacles and in relatively accurate location areas for missing fastener scanning, FAST-PCA is used as the feature extraction method of identification after the comparison of several algorithms.

关键词： Fasteners image edge detection Feature extraction Rails Principal component analysis Steel Electronic ballasts

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A method of measuring the phase difference between two pulse signals

A method of measuring the phase difference between two pulse...

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international congress on image and signal processing, biomedical engineering and informatics (CISP-BMEI)

作者： Wenjian Chen Hui Sun Yizhe Wang Lianghao Lv Tiansi An College of Underwater Acoustic Engineering Harbin Engineering University Harbin China Dalian Scientific Test & Control Technology Institute Dalian

ISBN: (纸本)9781509037117

A method of measuring the CW pulse signal phase difference is proposed, which is able to measure the phase difference between the difference frequency wave of parametric array and the small amplitude wave with the same frequency. The method is verified by simulation experiment. The factors influencing the measurement results ware discussed, such as the sampling rate, noise and sensor position. The numerical analysis results show that the proposed method can effectively measure the phase difference between the difference frequency wave of parametric array and the small amplitude wave with the same frequency.

关键词： Frequency measurement Sonar equipment Phase measurement Sea measurements Acoustic measurements Noise measurement Measurement uncertainty

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YUV-based Material Modeling from a Single image

YUV-based Material Modeling from a Single Image

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international congress on image and signal processing, biomedical engineering and informatics

作者： Xu Zhang Lin Yang Shulin Cui Tao Wu Zhuhai College of Jilin University Seasun Holdings Limited

ISBN: (纸本)9781509037117

Different from traditional algorithms, the material modeling method utilizing luma Y in YUV color space has been developed in this paper. Our method, which interactively acquires material appearance from a single image, includes four main steps: removing highlight, recovering normal based on luma Y, estimating diffuse coefficient, setting glossiness and specular coefficient interactively. The experiment results indicate that the proposed technique can effectively extract the material appearance from a single image within several seconds.

关键词： Material modeling Highlight YUV Interactive

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An assessment method of tongue image quality in Traditional Chinese Medicine

An assessment method of tongue image quality in Traditional ...

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international congress on image and signal processing, biomedical engineering and informatics (CISP-BMEI)

作者： Xiang Zhang Xinfeng Zhang Bo Chao Wang Guangqin Hu College of Electronic and Control Engineering Beijing University of Technology Beijing China Engineering Research Center of Digital Community Ministry of Education Beijing China

ISBN: (纸本)9781509037117

In the paper, we present a method for evaluating the quality of tongue images in Traditional Chinese Medicine (TCM). First, we preprocess the original images to segment the tongue images. Second, geometric features, texture features and spectral entropy features and spatial entropy features based on Spatial-Spectral Entropy-based Quality (SSEQ) index of tongue images are extracted respectively to form 17 dimensional feature vector for the tongue image quality assessment. Finally, Support vector machine (SVM) model is used to classify the samples. The experimental result shows that our method has a better effect on the tongue image quality assessment for the objectification of tongue diagnosis.

关键词： Tongue Feature extraction Entropy Support vector machines image quality image segmentation image edge detection

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Recurrence-based phase synchronization analysis of digit kinetic signals during precision grip

Recurrence-based phase synchronization analysis of digit kin...

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international congress on image and signal processing, biomedical engineering and informatics (CISP-BMEI)

作者： Ke Li Na Wei Shouwei Yue Institute of Biomedical Engineering Shandong University Jinan China Department of Geriatrics Department of Physical Medicine and Rehabilitation Shandong University Jinan China

ISBN: (纸本)9781509037117

The inter-digit coordination during precision grip was assessed using a recurrence-based phase synchronization (PS) analysis in this study. The PS across the normal forces of the thumb and index finger with respect to the contact surface serve as a critical dynamical strategy underlying precision grip. When both the thumb and index finger had reduced tactile sensitivity, the PS of Fz increased compared to the conditions with normal digit tactile sensation. This result suggested a compensatory mechanism relying more on the feedforward control with reduced tactile sensory information. The PS analysis would shed light on the mechanisms of digit-force coordination and facilitate assessment of sensorimotor function in patients suffered from neuropathies.

关键词： Thumb Synchronization Silicon Indexes Kinetic theory Testing

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