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

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The Efficient Realization of B Mode Ultrasonic Digital Scan Conversion Based On Radix-4 CORDIC Algorithm

The Efficient Realization of B Mode Ultrasonic Digital Scan ...

引用

2011 4th international congress on image and signal processing(第四届图像与信号处理国际学术会议 CISP 2011)

作者： Peng Zeng Fanshui Lu Xingqun Zhao Department of Biomedical Engineering Southeast University Nanjing Jiangsu 210096 China

Coordinate transform is the core technology in Digital Scan Conversion (DSC) of B-mode ultrasonic, and its speed mostly determines the frame rate of Bmode imaging. In the traditional coordinate transform process, ultrasonic echo data is converted from polar coordinate to rectangular directly;the process is time-consuming and the data is unsuitable for posttreatment In this paper, we employed the CORDIC Algorithm in coordinate transform. We compared the conventional radix-2 CORDIC algorithm with the improved radix-4 CORDIC algorithm and found the later saved half iterations at the same frequency. What's more, radix-4 CORDIC algorithm had smaller hardware consumption when using the pipelined structure. These results revealed that radix-4 CORDIC is an excellent method for high-speed DSC of B-mode ultrasonic.

关键词： coordinate transform DSC radix-4 CORDIC algorithm FPGA architecture

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Feature Extraction and Classification of Event-related EEG Based on Kolmogorov Entropy

Feature Extraction and Classification of Event-related EEG B...

引用

2011 4th international congress on image and signal processing(第四届图像与信号处理国际学术会议 CISP 2011)

作者： Lin Gao Jue Wang Haoshi Zhang Jin Xu Yang Zheng The Key Laboratory of Biomedical Information Engineering of Ministry of Education Xi'an Jiaotong University Xi'an Shaanxi 710049 P.R. China

In this paper, we propose a novel method with Kolmogorov entropy to extract the feature of eventrelated EEG. The results show that the Kolmogorov entropy can effectively quantify the dynamic process of event-related desynchronization/synchronization (ERD/ERS) time course of EEG in relation to hand movement imagination. The relative increase and decrease of Kolmogorov entropy could be an indicator of ERD/ERS. To testify the validity of Kolmogorov entropy measure, the method is tested on five human subjects for feature extraction to classify the left- and right-hand motor imagery by Support Vector Machine (SVM) classifier. An average accuracy and mutual information of 91.5％ and 0.5374 are obtained, which highly outperforms the commonly used method of AR model. The results confirm that Kolmogorov entropy analysis may improve accuracy for classification of motor imagery tasks, and have applications to performance improvement of brain-computer interface (BCI) systems.

关键词： hand motor imagery Kolmogorov entropy ERD/ERS time course SVM

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Comparison of PUMA and CUNWRAP to 2-D phase unwrapping

Comparison of PUMA and CUNWRAP to 2-D phase unwrapping

引用

international Conference on Electrical engineering and informatics, ICEEI

作者： Nurjannah Syakrani Tati L. R. Mengko A.B. Suksmono Eddy T. Baskoro Institut national de la recherche scientifique Varennes Québec Canada Biomedical Engineering Research Group ITB Indonesia Telecommunication Engineering Research Group ITB Indonesia Combinatorial Mathematics Research Group ITB Indonesia

Phase unwrapping (PU) is the process of recovering the absolute phase φ from the wrapped phase ψ. PU is the one of the most important step of the interferometry SAR processing for calculation of DEM, and can be applied to other field, such as MRI medical image. This paper presents comparison two algorithms for two dimensional phase unwrapping based on network programming, namely PUMA and CUNWRAP. The PUMA (Phase Unwrapping Maximum Flow), PUMA has first order Markov Random Fields used for the energy minimization framework. PUMA algorithm solves integer optimization problems, by computing a sequence of binary optimizations, solved by graph cuts techniques for PU max-flow/min-cut. PUMA is the minimum L p norm or Global class of PU problem. CUNWRAP (Constantini unwrapping) is a phase unwrapping method that exploits globally the integer qualities of the problem. CUNWRAP method leads to formulating the PU model as the problem of minimizing the weighted deviations between the estimated and the unknown neighboring pixel differences of the unwrapped phase with the constraint that the deviation must be integer multiple of 2π. CUNWRAP used as network structure and makes it possible to employ very efficient strategies (linear programming method) for its solution. The formulation of phase unwrapping problem by CUNWRAP is a global minimization problem with integer variable. The two algorithms applied to test performed on simulated and real image (interferometric SAR data and magnetic resonance imaging). Ratio of elapsed time between CUNWRAP and PUMA, range for simulation image test is 1.6 to 9.09 times, while range for real image test is 4 to 37 times. Based on Peak signal to Noise Ratio (PSNR), effect of noise for simulated data, view of unwrapping result, elapsed time, show that PUMA is better than CUNWRAP globally.

关键词： Minimization PSNR Optimization Magnetic resonance imaging Optical interferometry Phase measurement

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Quantitative Measurement of Human Chorionic Gonadotropin (hCG) Based on Digital image processing

Quantitative Measurement of Human Chorionic Gonadotropin (hC...

引用

2010 3rd international Conference on biomedical engineering and informatics (BMEI 2010)

作者： Shi, Mengying Cui, Meng Zhu, Yisheng Niu, Jinhai Tong, Shanbao Shanghai Jiao Tong Univ Dept Biomed Engn Shanghai 200030 Peoples R China Shanghai Jiao Tong Univ Med X Res Inst Shanghai Peoples R China

ISBN: (纸本)9781424464968

Our research aims to develop a novel method for quantitative measurement of hCG concentration in human serum. Based on digital imaging processing technique, the relationship between hCG concentration and image information of reaction dot on hCG test sample can be built and be described as a standard curve. According to this standard curve, concentration of hCG sample can be measured. The image information of hCG test sample is captured by CCD mini-camera and is processed by digital signal processor (DSP). The sensitivity can be under 10mIU/ml. The high accuracy makes our system significantly potential application in clinical diagnosis.

关键词： hCG quantitative measurement POCT digital image processing digital signal processor

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The processing of Cardiac image Based on Optical Mapping

The Processing of Cardiac Image Based on Optical Mapping

引用

2010 3rd international Conference on biomedical engineering and informatics (BMEI 2010)

作者： Xiao, Hua Lv, Xizhao S China Normal Univ Guangzhou Guangdong Peoples R China

ISBN: (纸本)9781424464968

Cardiac optical mapping changes cardiac membrane potential into optical signal with the voltage-sensitive dye, and carrys out image acquisition, storage, processing and other functions. This paper successfully finish image processing of the rabbit heart based on optical mapping, displaying membrane potential conduction map, denoising single-cell action potential duration map, locating the beginning of depolarization and the ending of repolarization, and Calculating polarization period length. The results of study in this paper can be combined cardiac electrophysiology computer simulation technology to explore the mechanism of cardiac fibrillation and defibrillation, and provide references to cardiac electrophysiology research.

关键词： Optical Mapping Voltage-Sensitive Dye Membrane Potential Depolarization and Repolarization

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The Study on Improving Fluorescence Microscopy image Effects of Genomic In Situ Hybridization

The Study on Improving Fluorescence Microscopy Image Effects...

引用

2010 3rd international Conference on biomedical engineering and informatics (BMEI 2010)

作者： Qu, Min Zhang, Yanming Harbin Univ Commerce Food Engn Coll Dept Bioengn Harbin Peoples R China

ISBN: (纸本)9781424464968

Fluorescence microscopy is an important optical microscopic observation apparatus used for the research of cytobiology and cytogenetics. By using microscopic photography, digital CCD imaging instrument and other devices, researchers can observe and capture images of FISH, GISH, and Green fluorescent protein (GFP), etc. In practice, however, in order to get good experimental results with a clear background and distinctive hybridization signal for GISH in Triticeae, it is necessary to improve GISH image processing and the resolution. In this paper the main points for improving GISH technology and image effects in Triticeae are discussed, such as Chromosome preparation, the technical requirements of the probe, application of hybrid reaction promoter, and fluorescence microscopy observation, photography and image processing, etc.

关键词： ISH GISH image fluorescence microscopy

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Reinterpretations of visual cognition from view of decomposition and synthesis

Reinterpretations of visual cognition from view of decomposi...

引用

international congress on image and signal processing

作者： Xiao, Songshan Wang, Lijuan Biomedical Engineering Tianjin University Tianjin China

A special visual phenomenon is found. Based on Spatial frequency characteristics, the visual phenomenon is analyzed by decompositing and synthesizing spatial frequency of origin image to testify the existing of visual... 详细信息

ISBN: (纸本)9781424465149

关键词： decomposite spatial frequency synthesis visual phenomenon

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High-throughput cost-effective and low-power AES chip design

High-throughput cost-effective and low-power AES chip design

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2010 3rd international congress on image and signal processing, CISP 2010

作者： Liang, Yunping Li, Ye Zhang, Chengmin Key Laboratory for Biomedical Informatics and Health Engineering Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen China

ISBN: (纸本)9781424465149

This paper proposes a high-throughput cost-effective and low-power implementation of AES (Advanced Encryption Standard) supporting encryption and decryption with 128-bit cipher key. Considering the cost-effective and low-power, resource-sharing scheme is employed to reduce the hardware complexity of the cipher and decipher. In addition, we adopt composite field arithmetic solution to implement SubByte/InvSubByte and byte-level structure to implement MixColumns/InvMixColumns transformation. Considering the high-throughput, we present a mixed pipelining architecture with both inner-round and outer-round pipelining for 10 iteration rounds of operation. The performance is evaluated on SMIC 0.18um CMOS technology and the throughput achieves at 8Gbps with the cost of only 17519 equivalent NAND2 gates, and the power consumption is only 9.7mw. ©2010 IEEE.

关键词： Throughput

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Cancer area extraction for uterine cervical image based on spectral matting

Cancer area extraction for uterine cervical image based on s...

引用

2010 3rd international congress on image and signal processing, CISP 2010

作者： Zhang, ZiQian Wen, TieXiang Gu, Jia Wang, Lei Shenzhen Institutes of Advanced Technology CAS Shenzhen China University of Science and Technology of China Shenzhen China Key Lab. for Biomedical Informatics and Health Engineering CAS Shenzhen China

ISBN: (纸本)9781424465149

Extracting pathology area accurately is of great importance for robot assisted surgery system and computer aided diagnosis system. We extracted cancer area (acetowhite epithelium) in uterine cervical image based on spectral matting, which introduced the concept of fundamental matting components. Experiment results showed that for large and clear acetowhite epithelium area, almost all of details of tissue could be detected by user-guided matting. Besides, an extended user interaction mode reduces user effort and may avoid incomplete extraction result: in this mode the user is presented with several matting alternatives to choose from. In addition, transforming uterine cervical images from RGB model to XYZ color model could greatly improve the performance of cancer area extraction based on spectral matting. ©2010 IEEE.

关键词： Extraction

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Application research of image and signal processing techniques on the bio-diesel engine

Application research of image and signal processing techniqu...

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international Conference on biomedical engineering and informatics

作者： Mei, Deqing Xiao, Shumei Sun, Ping School of Automobile and Traffic Engineering Jiangsu University Zhenjiang China Department of Automobile Engineering Yangzhou Polytechnic College Yangzhou China

ISBN: (纸本)9781424464968

By high speed photography, scanning electron microscope and x-ray energy dispersive spectroscopy on the diesel engine fueled with bio-diesel and No.0 diesel, the combustion processing in cylinder and the characteristics of particulate matter (PM) from engine exhaust are researched. The findings show that there are some fine differences between bio-diesel and diesel, such as the transport performance of fuel under high pressure, the ignition flammability of the mixtures of air and fuel, and the granularity characteristics of particle matter from engine exhausts. This research is enormously significant to the development and utilization of bio-diesel. ©2010 IEEE.

关键词： Diesel engines

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