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KMID : 1151820080020020011
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Journal of the Korean Society of Radiology
2008 Volume.2 No. 2 p.11 ~ p.16
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Compression of Medical Images Using DWT
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Rhim Jae-Dong
Lee Sang-Bock
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Abstract
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The most difficult of implementation PACS is large amount of data. Therefore, PACS needs mass storage, as well as rapid transmission time. Consequently, medical images needs compression when stored in PACS. WT(wavelet transform) was announced by Ingrid Daubechies and Stephane Mallat, WT was methods of signal analysis by a base functions set same as Fourie transform. This paper estimated an efficiency, that experimental medical images compressed by DWT. The result of estimated, we are knows effectiveness that display to remained signal in low frequency region after 4-level DWT form 512×512×2? input images. Compression ratio of images by 4-level DWT was 1:16. It is a high compression ratio, the other side has a problem appears on staircase phenomenon.
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KEYWORD
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PACS, Medical Images Compression, DCT, DWT
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