Figure 1
From: An improved reversible watermarking scheme using embedding optimization and quaternion moments
(a,d) First coordinate x(n). (b,e) Second coordinate y(n). (c,f) The phase space (x, y).
Figure 1 | Scientific Reports
From: An improved reversible watermarking scheme using embedding optimization and quaternion moments
(a,d) First coordinate x(n). (b,e) Second coordinate y(n). (c,f) The phase space (x, y).
