A Novel Printable Watermarking Method in Dithering Halftone Images

Figure 4

An example of subimage segmentation. (a) An image divided into 3 × 3 blocks, each of which has 4 × 4 subblocks. (b) The segmentation result of (a). (c) The segmentation result of Figure 2(b).

(a)

(b)

(c)