A Novel HDR Image Zero-Watermarking Based on Shift-Invariant Shearlet Transform

Table 4

NCs of eight HDR images under different TM attacks.

	Rend01	Rend07	Rend09	Rend10	Rend13	AtriumNight	CS_Warwick	Rend11
TM1	0.9874	0.9486	0.9898	0.9550	0.9771	0.9876	0.9678	0.9442
TM2	0.9910	0.9551	0.9868	0.9815	0.9749	0.9861	0.9697	0.9550
TM3	0.9733	0.9451	0.9662	0.9525	0.9708	0.9542	0.9683	0.9537
TM4	0.9944	0.9807	0.9951	0.9870	0.9927	0.9927	0.9951	0.9853
TM5	0.9529	0.9324	0.9486	0.9412	0.9469	0.9443	0.9529	0.9144
TM6	0.9929	0.9963	0.9974	0.9949	0.9983	0.9963	0.9969	0.9871
TM7	0.9839	0.9531	0.9755	0.9815	0.9608	0.9773	0.9719	0.9708
TM8	0.9980	0.9538	0.9924	0.9829	0.9845	0.9862	0.9443	0.9624
TM9	0.9907	0.9636	0.9777	0.9798	0.9782	0.9793	0.9828	0.9665
TM10	0.9785	0.9347	0.9593	0.9557	0.9781	0.9611	0.9662	0.9446
TM11	0.9898	0.9597	0.9852	0.9823	0.9773	0.9798	0.9809	0.9732
TM12	0.9944	0.9879	0.9937	0.9916	0.9952	0.9930	0.9901	0.9857
TM13	0.8899	0.8164	0.8981	0.8426	0.8869	0.8978	0.8796	0.9009
TM14	0.8923	0.9478	0.9370	0.9011	0.9443	0.9320	0.8538	0.8823
Average	0.9721	0.9482	0.9716	0.9592	0.9690	0.9691	0.9586	0.9519