Figure 16From: A Contourlet-Based Image Watermarking Scheme with High Resistance to Removal and Geometrical AttacksRecovered watermarks from Lena image under geometric attacks (a) cropping half top (NC = 0.9759) (b) cropping 400×450 (NC = 0.9398) (c) cropping half right (NC = 0.6697) (d) cropping half left (NC = 0.7260) (e) rotation (angle = 20°) (f) scaling (factor = 2) (g) cropping half down (NC = 0.1277).Back to article page