Journal of the Korean Society of Radiology (한국방사선학회논문지)

The Korean Society of Radiology (한국방사선학회)
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A study on improvement of SPIHT algorithm using redundancy bit removing for medical image

의료영상을 위한 중복비트 제거를 이용한 SPIHT 알고리즘의 개선에 관한 연구

  • Park, Jae-Hong (Dept. Radiological Technology, Choonhae College of Health Science) ;
  • Yang, Won-Seok (Dept. of Radiology, Dong-A University Hospital) ;
  • Park, Chul-Woo (Dept. of Electronic Information Communication, Dong-Pusan College)
  • 박재홍 (춘해보건대학 방사선과) ;
  • 양원석 (동아대학교 의료원 영상의학실) ;
  • 박철우 (동부산대학 전자정보통신과)
  • Received : 2011.08.30
  • Accepted : 2011.12.22
  • Published : 2011.12.30
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Abstract

This paper presents improvement of compression rate for SPIHT algorithm based on wavelet compression through redundancy bit removing. Proposed SPIHT algorithm uses a method to select of optimized threshold from feature of wavelet transform coefficients and removes sign bit only if coefficient is LL area. Finally Proposed SPIHT algorithm applies to Huffman coding. Experimental results show that the proposed algorithm achieves more improvement bit rate and more fast progressive transmission with low bit rate.

초기치에서 발생되어지는 비트의 소비를 저주파영역에서의 부호화하는 과정을 없애고, 각 대역별 임계값을 통해, 비트정렬시 LIS에서 발생되어 질 수 있는 비트 소비를 줄일 수 있었다. 그리고 마지막 단계로 허프만 코딩을 적용하여 압축효율을 향상시켰다. 실험 결과를 통해, 특히 낮은 비트율에 대해서 비트율의 향상을 가져오게 되어 전송시에 있어서 더욱 점진적이고 프로그레시브한 전송을 가능하게 되었다.

Keywords

References

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