Open AccessOptical encryption via monospectral integral imaging
Author(s) -
Xiaowei Li,
Zhao Min,
Yan Xiao,
Lei Li,
Seok-Tae Kim,
Xin Zhou,
QiongHua Wang
Publication year - 2017
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.031516
Subject(s) - integral imaging , grayscale , gamut , computer science , computer vision , encryption , multispectral image , optics , artificial intelligence , color filter array , decoding methods , color gel , physics , pixel , algorithm , image (mathematics) , thin film transistor , electrode , quantum mechanics , operating system
Optical integral imaging (II) uses a lenslet array and CCD sensor as the 3D acquisition device, in which the multispectral information is acquired by a color filter array (CFA). However, color crosstalk exists in CFA that diminishes color gamut, resulting in the reduced resolution. In this paper, we present a monospectral II encryption approach with a monospectral camera array (MCA). The monospectral II system captures images with the MCA that can eliminate color crosstalk among the adjacent spectral channels. It is noteworthy that the captured elemental images (EIs) from the colored scene belong to grayscale; the colored image encryption is converted to grayscale encryption. Consequently, this study will significantly save the calculation load in image encoding and decoding (nearly reduced 2/3) compared with the similar works. Afterwards, an optimized super-resolution reconstruction algorithm is introduced to improve the viewing resolution.