What are the acceptable ranges of MSE, MAE, and PSNR values in the context of image encryption?

In my research on image encryption, I use the metrics below to evaluate the level of distortion between the original image ( I ) and its encrypted version ( I’ ):

MSE (Mean Squared Error)
MAE (Mean Absolute Error)
PSNR (Peak Signal-to-Noi… Continue reading What are the acceptable ranges of MSE, MAE, and PSNR values in the context of image encryption?