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

Figure 12

Flipping based on score of smoothness and connectivity. The black pixels count of the original font binary image is 12270; we flipped the original font binary image in every 300 pixels: (a) the original font binary image; (b) flipping position of adding 300 pixels in original font binary image; the red point denotes the flipping position; (c) the font binary image after flipping 300 pixels in original image; (d) flipping position of adding 600 pixels; (e) the font binary image after flipping 600 pixels in original image; (f) flipping position of adding 900 pixels; (g) the font binary image after flipping 600 pixels in original image; (h) flipping position of adding 900 pixels, but the number of flappable pixels is less than 1200; (i) the font binary image after flipping 1200 pixels in original image, but it just flipped 1116 pixels in real.

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