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