Optical hyperspectral data encryption in spectrum domain by using 3D Arnold and gyrator transforms

ABSTRACT

In this letter, a hyperspectral image encryption algorithm based on 3D Arnold transform and gyrator transform in spectrum domain is proposed. First, the original hyperspectral cube will be scrambled by 3D Arnold transform in the spatial domain. Subsequently, the obtained intermediate data are converted into spectrum domain to create a new spectral image. This new spectral image is decomposed into numerous single pieces and encoded using gyrator transform. The corresponding decrypted hyperspectral cube can be recovered by performing along the reverse direction of the encryption process. Some numerical simulations have been performed to verify the validity and capability of the proposed hyperspectral encryption algorithm.

KEYWORDS:

• Hyperspectral image
• image processing
• optical security and encryption

Acknowledgment

The authors wish to thank Mr. Chengwei Yang in Baicheng Ordnance Test Center of China for the valuable discussion. The authors are indebted to the six anonymous reviewers for their useful comments.