Journal
OPTICS COMMUNICATIONS
Volume 387, Issue -, Pages 235-240Publisher
ELSEVIER
DOI: 10.1016/j.optcom.2016.11.066
Keywords
QR code; Double Random Phase Encoding; Optical encryption; Decryption; Speckle noise; Gray scale image
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Funding
- National Natural Science Foundation of China [61401287]
- Natural Science Foundation of Shenzhen [JCYJ20160307154003475, JCYJ2016050617265125]
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In optical encryption systems, speckle noise is one major challenge in obtaining high quality decrypted images. This problem can be addressed by employing a QR code based noise-free scheme. Previous works have been conducted for optically encrypting a few characters or a short expression employing QR codes. This paper proposes a practical scheme for optically encrypting and decrypting a gray-scale image based on QR codes for the first time. The proposed scheme is compatible with common QR code generators and readers. Numerical simulation results reveal the proposed method can encrypt and decrypt an input image correctly.
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