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Research on Ulstrosonic Images Compression Algorithm Based on Hypercomplex

Author: LiuYiPeng
Tutor: WangQiang
School: Harbin Institute of Technology
Course: Control Science and Engineering
Keywords: Hypercomplex Image Compression Discrete Cosine Transform Wavelet Transform Empirical Mode Decomposition
CLC: TP391.41
Type: Master's thesis
Year: 2011
Downloads: 25
Quote: 0
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Abstract


China is a vast territory of the country , more dispersed deployment of the hospital , but also a significant regional differences in the level of medical treatment in our country it is necessary to the development of telemedicine services and technology . However , the communication network bandwidth can not be unlimited growth , which requires the remote transmission of data compression and storage , thereby increasing the speed and stability of the transmission . Safe and accurate medical diagnostic color Doppler ultrasound diagnosis , making the ultrasound image compression research is necessary . The medical image compression characteristics for diagnostic area near lossless compression , while for the background area , the high compression ratio of a lossy compression . The hypercomplex can be very convenient representation of the 3 -channel component of the color image , and the combined analysis transform means makes the decomposition coefficients Discrete sparse , more conducive to extract useful information . Empirical Mode Decomposition (EMD) as a new data decomposition , image texture information can be retained in the case of high compression ratio . Therefore, the main objective of the study in this article is for nearly transformation method based on the ultrasound image diagnosis area in hypercomplex description , lossless compression and lossy compression based EMD background . First , this article summarizes hypercomplex computing and its development in the field of image processing , as well as existing compression methods and medical image compression on the latest progress . Second, the combination of matrix analysis of singular value decomposition (SVD) calculation method , the hypercomplex singular value decomposition , and applied to the the ultrasound color image compression . Next, the calculation of the discrete cosine transform (DCT) process in the existing standard JPEG , analysis of the drawbacks of the DCT compression , study hypercomplex DCT theoretical basis , to verify the feasibility of the hypercomplex DCT is applied to a the ultrasound color image compression . Then , to achieve two basic wavelet compression method , hypercomplex wavelet amplitude - phase representation of the design of a simple quantitative criteria , and compression index analysis . Finally, the ultrasonic background image the existing EMD coding method based on proposed consider the the local pole location of the non - uniform varying sampling EMD compression mode , with some innovative significance .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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