Fig. 6From: A hybrid NSCT domain image watermarking schemeThe examples of using morphology to determine the maximum connected component. a is the morphology diagram. b, c, and d are not tampered by rotation and are re-rotated at 0°. They are the result after doing morphology closing on the perfect angle of watermark. e, f, and g are not tampered by rotation but are re-rotated at 10°. They are the result after doing morphology closing on the error angle of watermark. The black part is the connected component. b Exclusive-or. c dilation. d erosion. e Exclusive-or. f dilation. g erosionBack to article page