Research Article
Reversible Watermarking Using Prediction-Error Expansion and Extreme Learning Machine
Figure 4
Prediction diagram of 8 × 8 image data.
(a) Original 8 × 8 image data |
(b) Predicted 8 × 8 image data by MED |
(c) Predicted 8 × 8 image data by OELM-MED |