Chuang C.-HChen C.-YChang H.-THOANG-YAN LINKuo C.-F.2022-04-252022-04-25202220763417https://www.scopus.com/inward/record.uri?eid=2-s2.0-85123543048&doi=10.3390%2fapp12031413&partnerID=40&md5=86ade706f2a2cf09e25691db149ade6ahttps://scholars.lib.ntu.edu.tw/handle/123456789/607093A new optical encryption algorithm, called the random-phase encryption algorithm, is proposed in this study. When this algorithm was applied in constructing computer-generated holograms, the out-of-focus image crosstalk was effectively reduced, and the image quality was greatly enhanced. In this study, the researchers encrypted each multi-depth or multi-view random phase sub-image with the phase-locked key to generate multi-channel encryption phase information. During the reconstruction, the switch of the phase-locked key of the sub-image was found to achieve different image reconstruction effects with different views or depths. This algorithm proved to substantially reduce the out-of-focus image crosstalk and to enhance the reconstruction quality of the original computer holography without concerning the mutual interference among the information of each view for multi-view and multi-depth holograms. ? 2022 by the authors. Licensee MDPI, Basel, Switzerland.A new optical encryption algorithm, called the random-phase encryption algorithm, is proposed in this study. When this algorithm was applied in constructing computer-generated holograms, the out-of-focus image crosstalk was effectively reduced, and the image quality was greatly enhanced. In this study, the researchers encrypted each multi-depth or multi-view random phase sub-image with the phase-locked key to generate multi-channel encryption phase information. During the reconstruction, the switch of the phase-locked key of the sub-image was found to achieve different image reconstruction effects with different views or depths. This algorithm proved to substantially reduce the out-of-focus image crosstalk and to enhance the reconstruction quality of the original computer holography without concerning the mutual interference among the information of each view for multi-view and multi-depth holograms. © 2022 by the authors. Licensee MDPI, Basel, Switzerland.Computer-generated holographyOptical encryption algorithmReducing defocused-information crosstalkComputer-generated holography; Optical encryption algorithm; Reducing defocused-information crosstalk[SDGs]SDG3journal article10.3390/app120314132-s2.0-85123543048