A Polar Complex Exponential Transform-Based Zero-Watermarking for Multiple Medical Images with High Discrimination

Table 10

Computational time comparison (s).

Proposed scheme			Scheme [19]	Scheme [20]	Scheme [24]
1 image each group	3 images each group	5 images each group
11.98	12.18	11.90	269.52	186.65	18.36