High-Capacity Data Hiding Method Based on Two Subgroup Pixels-Value Adjustment Using Encoding Function

Figure 12

The PDH test to MPA on different images with n = 2,4 and k = 2, 3, 4. (a) F-16 (n = 2, k = 2). (b) Barbara (n = 2, k = 3). (c) Boat (n = 2, k = 4). (d) Pepper (n = 4, k = 2). (e) Lena (n = 4, k = 3). (f) Tiffany (n = 4, k = 4).

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