Secure Image Authentication Scheme Using Double Random-Phase Encoding and Compressive Sensing

Table 5

Information entropies for various methods.

Image	Information entropies
	Plaintext	Ref. [41]	Ref. [42]	Ref. [43]	Ours
Camera	7.0097	7.9966	7.9955	7.9964	7.9984
Lena	7.2045	7.9951	7.9965	7.9984	7.9983
Baboon	7.0091	7.9947	7.9963	7.9954	7.9982
Peppers	7.5813	7.9965	7.9958	7.9982	7.9984