Experimental research on optical image encryption system based on joint Fresnel transform correlator

被引：40

作者：

Dou, Shuaifeng ^{[1
]}

Shen, Xueju ^{[1
]}

Zhou, Bing ^{[1
]}

Wang, Long ^{[2
]}

Lin, Chao ^{[3
]}

机构：

[1] Army Engn Univ, Dept Optoelect Engn, Shijiazhuang 050000, Hebei, Peoples R China

[2] Noncommissioned Officers Sch, Hangzhou 311400, Zhejiang, Peoples R China

[3] Yantai Aviat Univ, Yantai 264001, Peoples R China

来源：

OPTICS AND LASER TECHNOLOGY | 2019年 / 112卷

关键词：

Optical encryption; Joint Fresnel transform correlator; Decrypted image quality; Optimized phase masks; RANDOM-PHASE ENCRYPTION; QR CODE; INFORMATION; RETRIEVAL; AMPLITUDE; DESIGN; SECURE; MASK;

D O I：

10.1016/j.optlastec.2018.11.004

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Optical image encryption system based on joint Fresnel transform correlator is experimentally researched. Factors affecting decrypted image quality are analyzed, and measures of improving decrypted image quality are taken. Firstly, after a few denoising operations are performed, noise in decrypted image is effectively reduced. Secondly, effects of experimental device parameters on decrypted image quality are also analyzed. After random phase mask in object window and key mask are both optimized by an iteration algorithm, space bandwidth of joint image can match with that of experimental system. Through above-mentioned methods, quality of decrypted image is remarkably improved. Correlation coefficient (0.8346) between experimental decrypted image and original image is close to that (0.8686) between simulational decrypted image and original image. Experimental error-bit rate in decrypted image is also analyzed.

引用

页码：56 / 64

页数：9

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