TABLE 6.

Investigation of the effectiveness of the multistage strategy. Single stage algorithms with $P=8$ and $P=4$ have been compared with a multistage algorithm with $P_1=8$ and $P_2=4$. PSNR, SSIM and normalized approximation error corresponding to each figure have been written in brackets.

Missed image	One stage algorithm ($P=8$)	One stage algorithm ($P=4$)	Two stage algorithm ($P_1=8$, $P_2=4$)
[5.96,0.002,0.99]	[17.81,0.82,0.25]	[17.66,0.81,0.27]	[18.15,0.83,0.24]