| Title |
Dynamic visual cryptography scheme on the surface of a vibrating structure |
| Authors |
Vaidelys, Martynas ; Aleksiene, Sandra ; Ragulskiene, Jurate |
| Full Text |
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| Is Part of |
Journal of vibroengineering.. Kaunas : JVE International. 2015, vol. 17, iss. 8, p. 4142-4152.. ISSN 1392-8716 |
| Keywords [eng] |
dynamic visual cryptography ; time-averaged moiré ; Ronchi grating ; cover image |
| Abstract [eng] |
Dynamic visual cryptography scheme based on time-averaged fringes generated by Ronchi-type geometric moiré gratings on finite element grids is proposed in this paper. A single cover image is used to encode the secret image and is formed on the surface of a deformable structure. Time-averaged moiré fringes leak the secret when the structure is oscillated according to a predefined Eigen-shape. The envelope functions determining the motion induced blur of the Ronchi-type moiré grating depend on the characteristic features of the motion. And though harmonic oscillations do not result into a completely uniform time-averaged image of the Ronchi-moiré grating, initial phase scrambling and phase normalization algorithms are used to encode the secret in the cover image. Theoretical relationships between the amplitude of the Eigen-shape, the order of the not completely developed time-averaged fringe and the pitch of the deformable one-dimensional Ronchi-type moiré grating are derived. |
| Published |
Kaunas : JVE International |
| Type |
Journal article |
| Language |
English |
| Publication date |
2015 |
| CC license |
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