Proceedings of the Korea Institute of Convergence Signal Processing (융합신호처리학회 학술대회논문집)
- 2000.08a
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- Pages.313-316
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- 2000
Image coding using quad-tree of wavelet coefficients
Wavelet coefficients의 quad-tree를 이용한 이미지 압축
Abstract
Wavelet transform has specific properties for image coding. The property used at this Paper is clustering of significant coefficients across subband. These coefficients are classified in significant coefficient and insignificant coefficient on a threshold value, and symbolized EZW decreases symbol-position information using zero-trees, but threshold value fall for raising resolution, then coding cost of significant coefficients is expensive. To avoid this fact, this paper uses quad-tree representing coefficient-position information. a magnitude of significant coefficient is represented on matrix used at EZW. the proposed algorithm is hoped for raising a coding cost.
Keywords