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

Figure 15

Flip the scaled font binary image; flipping count is 800 pixels: (a) original font binary image; (b) scaled font binary image which used our proposed interpolation algorithm; (c) flipped font binary image using our flipping strategy; (d) flipped font binary image using Wu’s method.

(a)

(b)

(c)

(d)