Table 3: Information entropy.

Image Original image Encrypted image

Cameraman 7.0097 7.9974
Peppers 7.5739 7.9976
Dollar 6.9785 7.9992
Lax 6.8272 7.9993
Aerial 6.9940 7.9992
Lena 7.2185 7.9993
Lake 7.4845 7.9993
Columbia 7.2736 7.9992
Boat 6.9391 7.9972