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

Table 1

Similarities between the zero-watermark generated from eight HDR images.

Image	Rend01	Rend07	Rend09	Rend10	Rend13	AtriumNight	CS_Warwick	Rend11
Rend01	1	0.6672	0.6528	0.5927	0.6402	0.6521	0.6824	0.6154
Rend07	0.6672	1	0.6376	0.6089	0.6809	0.6138	0.6536	0.6346
Rend09	0.6528	0.6376	1	0.6273	0.6338	0.6072	0.7014	0.6417
Rend10	0.5927	0.6089	0.6273	1	0.6238	0.6105	0.6117	0.6438
Rend13	0.6402	0.6809	0.6338	0.6238	1	0.6569	0.6478	0.6505
Rend11	0.6521	0.6138	0.6072	0.6105	0.6569	1	0.5958	0.6547
CS_Warwick	0.6824	0.6536	0.7014	0.6117	0.6478	0.5958	1	0.5903
Rend11	0.6154	0.6346	0.6417	0.6438	0.6505	0.6547	0.5903	1