Fig. 4From: Adaptive reversible image watermarking algorithm based on IWT and level setIterative results of geometric contour model for different types of images. a Original pepper image. b Pepper cut 5% from the left. c Original girl image. d Girl cut 10% from the left and the top, respectively. e Original Baboon image. f Baboon rotates 30°. g Original Lena image. h Lena rotates 45°Back to article page