Research Article
A Secure Asymmetric Optical Image Encryption Based on Phase Truncation and Singular Value Decomposition in Linear Canonical Transform Domain
Table 3
Histogram variance results of 5 images using the proposed cryptosystem.
| | S. No | Image | Variance of original image | Variance of encrypted image | Ref. [77] | Ref. [78] | Ref. [79] |
| | 1. | Lena | 38842.58 | 245.0547 | 244.31 | 276.39 | 260.70 | | 2. | Tree | 161272.20 | 233.272 | — | — | — | | 3. | Optical image processing | 21762.61 | 222.02 | — | — | — | | 4. | OPT | 31541.41 | 230.593 | — | — | — | | 5. | Baboon | 628013.38 | 228.59 | — | — | — |
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