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Medical Image Compression Based on Vector Quantization with Variable Block Sizes in Wavelet Domain
Joint Authors
Ma, Zhiyuan
Hu, Yang
Yang, Benqiang
Zhang, Libo
Jiang, Huiyan
Source
Computational Intelligence and Neuroscience
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-09-19
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
An optimized medical image compression algorithm based on wavelet transform and improved vector quantization is introduced.
The goal of the proposed method is to maintain the diagnostic-related information of the medical image at a high compression ratio.
Wavelet transformation was first applied to the image.
For the lowest-frequency subband of wavelet coefficients, a lossless compression method was exploited; for each of the high-frequency subbands, an optimized vector quantization with variable block size was implemented.
In the novel vector quantization method, local fractal dimension (LFD) was used to analyze the local complexity of each wavelet coefficients, subband.
Then an optimal quadtree method was employed to partition each wavelet coefficients, subband into several sizes of subblocks.
After that, a modified K-means approach which is based on energy function was used in the codebook training phase.
At last, vector quantization coding was implemented in different types of sub-blocks.
In order to verify the effectiveness of the proposed algorithm, JPEG, JPEG2000, and fractal coding approach were chosen as contrast algorithms.
Experimental results show that the proposed method can improve the compression performance and can achieve a balance between the compression ratio and the image visual quality.
American Psychological Association (APA)
Jiang, Huiyan& Ma, Zhiyuan& Hu, Yang& Yang, Benqiang& Zhang, Libo. 2012. Medical Image Compression Based on Vector Quantization with Variable Block Sizes in Wavelet Domain. Computational Intelligence and Neuroscience،Vol. 2012, no. 2012, pp.1-8.
https://search.emarefa.net/detail/BIM-480051
Modern Language Association (MLA)
Jiang, Huiyan…[et al.]. Medical Image Compression Based on Vector Quantization with Variable Block Sizes in Wavelet Domain. Computational Intelligence and Neuroscience No. 2012 (2012), pp.1-8.
https://search.emarefa.net/detail/BIM-480051
American Medical Association (AMA)
Jiang, Huiyan& Ma, Zhiyuan& Hu, Yang& Yang, Benqiang& Zhang, Libo. Medical Image Compression Based on Vector Quantization with Variable Block Sizes in Wavelet Domain. Computational Intelligence and Neuroscience. 2012. Vol. 2012, no. 2012, pp.1-8.
https://search.emarefa.net/detail/BIM-480051
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-480051