Optical hyperspectral image encryption based on improved Chirikov mapping and gyrator transform

We present an optical hyperspectral image cryptosystem using improved Chirikov mapping in the gyrator transform domains. This optical encryption scheme can hide the spatial and spectrum information simultaneously. First, the original hyperspectral image is converted into binary format and then extended into a one dimensional array. Subsequently, improved Chirikov mapping is performed to generate a position array. Here, the binary array of the image can be scrambled by the position sequence. Finally, three thin cylinder lenses are controlled using a PC to implement the gyrator transform, and the amplitude and phase information in the output plane is considered to be the encrypted information. Some numerical simulations verify the validity and capability of the proposed cryptosystem.