A New Pixels Flipping Method for Huge Watermarking Capacity of the Invoice Font Image

Figure 10

Denoise examples based ongravity center and chaos degree. The black point is the gravity center of pattern . The line denotes the distance of each pixel to , in which the red line is the maximum distance of black pixel to gravity center and the blue line is the minimum distance of white pixel to gravity center: (a) the chaos degree is 12; by moving the black pixel which has the maximum distance to white pixel which has the minimum distance, we get pattern (b) whose chaos degree is 7; by moving the black pixel, we get the pattern (c) whose chaos degree is 4, less than 5.

(a)

(b)

(c)