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학술지 Intra Prediction-Based Hologram Phase Component Coding Using Modified Phase Unwrapping
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저자
김진겸, 오관정, 김진웅, 김동욱, 서영호
발행일
202103
출처
Applied Sciences, v.11 no.5, pp.1-17
ISSN
2076-3417
출판사
MDPI
DOI
https://dx.doi.org/10.3390/app11052194
협약과제
20JH1200, 디지털 홀로그래픽 테이블탑형 단말 기술 개발, 김진웅
초록
In this paper, we propose a method for compressing the phase component of a full-complex hologram. The JPEG (Joint Photographic Experts Group) Pleno is undergoing standardization for compressing full-complex holograms. If the full-complex hologram is compressed in the form of amplitude and phase components, the three-dimensional information of the hologram may be better preserved. Therefore, in order to solve the disadvantages of the method of independently compressing real and imaginary parts, we propose a method for directly compressing phase information. We select the HEVC (High Efficiency Video Coding), which has the best performance in compressing holograms from previous studies, as the anchor codec, and propose an algorithm for converting the phase information into the form suitable for the HEVC. Since the phase component is very random, we propose a modified phase unwrapping technique to improve this. In addition, in order to make good use of the property of HEVC Intra coding, the phase unwrapping considering Intra prediction is applied, and the most suitable HEVC Intra coding condition is searched. Compared with the result of compressing the phase using the HEVC, the hologram was improved by 2 dB or more and the reconstruction result was improved by more than 4 dB at a compression ratio of 80:1. If the compression ratio is increased, the proposed method has better results.
키워드
Full-complex hologram, HEVC Intra prediction, Hologram compression, Phase unwrapping
KSP 제안 키워드
Best performance, Imaginary part, Intra Coding, Intra prediction, Joint Photographic Experts Group(JPEG), Phase component, Phase information, Phase unwrapping, Prediction-based, Three dimensional(3D), Three-dimensional information
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