Fresnel domain double-phase encoding encryption of color image via ptychography

Liang Qiao; Yali Wang; Tuo Li; Yishi Shi

doi:10.1117/12.2202769

8 October 2015 Fresnel domain double-phase encoding encryption of color image via ptychography

Liang Qiao, Yali Wang, Tuo Li, Yishi Shi

Proceedings Volume 9675, AOPC 2015: Image Processing and Analysis; 96752O (2015) https://doi.org/10.1117/12.2202769
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China

Abstract

In this paper, color image encryption combined with ptychography has been investigated. Ptychographic imaging possesses a remarkable advantage of simple optics architecture and complex amplitude of object can be reconstructed just by a series of diffraction intensity patterns via aperture movement. Traditional technique of three primary color synthesis is applied for encrypting color image. In order to reduce physical limitations, the encryption’s algorithm is based on Fresnel transformation domain. It is illustrated that the proposed optical encryption scheme has well ability to recover the encrypted color plaintext and advances in security enhancement thanks to introducing ptychography, since light probe as key factor enlarges the key space. Finally, the encryption’s immunity to noise and reconstruction impact from lateral offset of probe has been investigated.

Citation Download Citation

Liang Qiao, Yali Wang, Tuo Li, and Yishi Shi "Fresnel domain double-phase encoding encryption of color image via ptychography", Proc. SPIE 9675, AOPC 2015: Image Processing and Analysis, 96752O (8 October 2015); https://doi.org/10.1117/12.2202769

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KEYWORDS

Image encryption

Computer programming

Information security

Computer security

Charge-coupled devices

Signal to noise ratio

Diffraction

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