Skewed Histogram Shifting for Reversible Data Hiding using
Skewed Histogram Shifting for Reversible Data Hiding using a Pair of Extreme Predictions Source: ) Authors: Speaker: IEEE Transactions on Circuits and Systems for Video Technology( Early Access Date: 12/20/2018 Suah Kim, Xiaochao Qu, Vasily Sachnev, Hyoung Joong Kim Tzu-Meng Wang 1
Related Work(1/3) two peaks: f. L and f. R bi: the bit to embed (0 or 1) histogram shifting f. L (8 5) f. R (200) 2
Related Work(2/3) histogram bin expansion histogram shifting b=1 0 1 0 2 4 85 95 1 3 84 95 85 85 73 94 85 85 72 94 85 84 72 94 193 200 253 200 19 3 20 0 25 4 20 0 193 200 254 201 20 0 20 8 18 9 25 2 200 207 189 251 200 208 189 252 3
Related Work(3/3) histogram shifting Image recovery extracted bin values 1 3 84 95 85 84 72 94 193 200 254 201 200 208 189 252 2 4 84 95 2 4 85 (1) 95 85 84 73 94 85 (0) 85 (1) 73 94 193 200 253 201 193 200 (0) 253 200 (1) 200 207 189 251 200 (0) 207 189 251 4
Preliminary-- Skewed Histogram(1/2) 5
Preliminary-- Skewed Histogram(2/2) 120 115 127 113 130 traditional histogram shifting 119 120 114 127 112 131 secret bit: 01 left skewed histogram shifting 120 115 127 113 131 120 115 127 128 113 132 6
Proposed Method(1/6) 7
Proposed Method(2/6) PHS(positive histogram shifting) NHS(negative histogram shifting) 8
Proposed Method(3/6) NHS PHS 77 125 127 128 125 127 126 125 125 126 124 125 123 125 126 9
Proposed Method(4/6) Extraction PHS(positive histogram shifting) NHS(negative histogram shifting) 10
Proposed Method(5/6) 77 125 127 126 124 125 126 125 125 123 124 126 11
Proposed Method(6/6) 77 125 127 81 123 127 126 125 124 125 123 124 126 125 122 124 1+2+1+0+1+1 =6 1+2+3+2+1+1 =10 12
Experiment Results(1/2) 13
Experiment Results(2/2) 14
Conclusion A novel way to do histogram shifting Increases PSNR 15
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