Conference Publication Details
Mandatory Fields
Shortt A.;Naughton T.;Javidi B.
Proceedings of SPIE - The International Society for Optical Engineering
Nonuniform quantization for compression of encrypted digital holograms
Optional Fields
Artificial neural network Digital holography Image compression Optical encryption Three-dimensional image processing
Compression and encryption/decryption are necessary for secure and efficient storage and transmission of image data. We present an optical encryption technique that takes advantage of both the massive parallelism inherent in optical systems and the flexibility offered by digital electronics. The encryption is performed using a phase mask and Fresnel propagation. We nonunifomily quantize the complex-valued encrypted hologram pixels using an artificial neural network. The in-line digital holograms of three-dimensional objects were created using phase-shift interferometry. With our lossy data compression technique we achieved good quality decryption and reconstruction from objects with a compression ratio of 32.
Grant Details