1 August 2001 Enhancement of signal-to-noise ratio of a double random phase encoding encryption system
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Optical Engineering, 40(8), (2001). doi:10.1117/1.1386643
Abstract
The tolerance to data loss of a double random phase encoding encryption system is studied, and the signal-to-noise ratio (SNR) of the decrypted image is investigated when part of the encrypted image is lost. In electronic implementation, the SNR will be enhanced by reducing the ratio of the sampling number of the image to the total sampling number. In optical implementation, the SNR can be increased by using a phase mask with higher spatial frequency. Both the theory and computer simulations are demonstrated.
Bor Wang, Ching-Cherng Sun, "Enhancement of signal-to-noise ratio of a double random phase encoding encryption system," Optical Engineering 40(8), (1 August 2001). http://dx.doi.org/10.1117/1.1386643
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KEYWORDS
Image encryption

Signal to noise ratio

Computer programming

Tolerancing

Optical image encryption

Fourier transforms

Image enhancement

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