Application of input amplitude masks in scheme of optical image encryption with spatially-incoherent illumination

Optical encryption with spatially incoherent illumination does not have drawbacks of coherent encryption techniques. In this case however, one of the factors affecting decrypted image quality is original image spectrum. In most cases, majority of image energy is concentrated in area of low spatial f...

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Bibliographic Details
Published in:Journal of physics. Conference series 2016-08, Vol.737 (1), p.12063
Main Authors: Shifrina, A V, Evtikhiev, N N, Krasnov, V V
Format: Article
Language:English
Subjects:
Amplitudes
Encryption
Illumination
Image quality
Physics
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Summary:Optical encryption with spatially incoherent illumination does not have drawbacks of coherent encryption techniques. In this case however, one of the factors affecting decrypted image quality is original image spectrum. In most cases, majority of image energy is concentrated in area of low spatial frequencies. Therefore, only this area in spectrum of encrypted image contains information about original image, while other areas contain only noise. Additional amplitude encoding of input scene can be used for increase of the size of the area of spatial frequencies containing useful information. Numerical simulation demonstrates reduction of decryption error up to 2.7 times.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/737/1/012063