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학술지 New Compression Method for Full-complex Holograms using the Modified Zerotree Algorithm with the Adaptive Discrete Wavelet Transform
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저자
김진겸, 김경진, 강지원, 오관정, 김진웅, 김동욱, 서영호
발행일
202011
출처
Optics Express, v.28 no.24, pp.36327-36345
ISSN
1094-4087
출판사
Optical Society of America (OSA)
DOI
https://dx.doi.org/10.1364/OE.406165
협약과제
20JH1200, 디지털 홀로그래픽 테이블탑형 단말 기술 개발, 김진웅
초록
In this paper, we propose a new method for coding a full complex hologram with random phase. Since holograms with random phase have very unique spatial and frequency characteristics, a new compression method suitable for such holograms is required. We analyze the frequency characteristics of holograms with random phases and propose a new adaptive discrete wavelet transform (aDWT). Next, we propose a new modified zerotree alogrithm (mZTA) suitable for the subband configuration generated by the modified wavelet transform method. The results of the compression using the proposed method showed higher efficiency than the previous method, and the reconstructed images showed visually superior results.
KSP 제안 키워드
Compression method, Discrete wavelet transform(DWT-EE), Frequency characteristics, Higher efficiency, Random phase, Wavelet transform(WT), Wavelet transform method, new method, reconstructed image