Research Article
RONI Based Secured and Authenticated Indexing of Lung CT Images
Table 2
PSNR values for the corresponding attacks.
| Attack | PSNR (dB) |
| No attack | | Salt and pepper noise with 0.01 as noise density | 28.06 | Salt and pepper noise with 0.02 as noise density | 24.39 | Reducing the contrast by 10 | 23.19 | Reducing the contrast by 30 | 21.89 | Motion blur with lens and theta as 0.1 | | Motion blur with lens and theta as 0.9 | |
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