Correction: A novel encryption scheme for high-contrast image data in the Fresnelet domain.

[This corrects the article DOI: 10.1371/journal.pone.0194343.].

There are incorrect values in Table 3 and Table 4. Please see the corrected Table 3 and Table 4 here.

Table 3

Statistical analysis.

ImageTest	Signaturetrue	Signatureencrypted	DDNTtrue	DDNTencrypted	USAFtrue	USAFencrypted
Entropy	7.4067	7.4037	0.0104	0.01609	0.4190	1.1379
Contrast	0.1455	7.8170	0.03602	0.0046	0.5509	-0.0014
Correlation	0.9848	0.2777	0.5928	0.0380	0.8330	0.8036
Homogeneity	0.9429	0.5412	0.9993	0.9996	0.9993	0.9284

Table 4

UACI, NPCR and Time.

	Signature	DDNT	USAF
UACI	33.4421	33.6721	33.1214
NPCR	99.6107	99.7813	99.7162
Time (Sec)	0.6405	0.6031	0.6114