A Formula Adaptive Pixel Pair Matching Steganography Algorithm

Figure 6

Comparison of the averaged vertical and horizontal difference histograms of FAPPM and FDEMD.

(a) FAPPM B=53, D=134

(b) FDEMD B=53,D=936

(c) FAPPM B=221, D=189

(d) FDEMD B=221, D=1449