Optical image encryption using double phase mask based on spherical wave illumination
-
Received Date:
2005-06-16
Accepted Date:
2005-09-20
-
Abstract
For the positive real function image encoded by double random-phase,the first random-phase mask placed in the blank can not serve as the key when the decrypted image is detected by intensity detector in the decrypting process.In connection with the defects,an improved encryption system illuminated with spherical wave is proposed.The input image is not nestled closely to the first random-phase mask,so the first random-phase mask can be used as the key for positive function image and the position of the first random-phase mask provides an additional key.Computer simulation indicates the feasibility of the proposed technique.
-
-
References
|
[1]
|
RéFéRGIER P,JAVIDI B.Optical image encryption based on input plane and Fourier plane random encoding[J].Opt Lett,1995,20(7):767～769. |
|
[2]
|
ABOOKASIS D,JAVIDI B.Security optical systems based on a joint transform correlator with significant output images[J].Opt Engng,2001,40(8):1584～1589. |
|
[3]
|
WANG R K,CHATWIN C.Random phase encoding for optical security[J].Opt Engng,1996,35(9):2464～2469. |
|
[4]
|
NOMURA T,JAVIDI B.Optical encryption using a joint transform correlator architecture[J].Opt Engng,2000,39(8):2031～2035. |
|
[5]
|
NISHCHAL N K,SINGH K.Fully phas-based encryption using fractional order Fourier domain random phase encoding:error analysis[J].Opt Engng,2004,43(10):2266～2273. |
|
[6]
|
SITU G H,ZHANG J J.double random-phase encoding in the Fresnel domain[J].Opt Lett,2004,29(14):1584～1586. |
|
[7]
|
WANG S F,ZHU Zh Q.Principle of modern optics[M].Chengdu:University of Electronic Science and Technology of China Press,1998.117～118(in Chinese). |
-
-
Proportional views
-
Map
DownLoad: