Abstract
In 2015, Lu proposed the (k, F1) interpolation-based reversible hiding scheme by using the center folding strategy (CFS) to improve the image quality of the interpolation neighboring pixels scheme. In Lu’s scheme, k is used to define the total number of thresholds for categories of the complexity of the block, and F1 is the length of the secret message that can be concealed in the smoothest area. The hiding performance of Lu’s scheme for the smooth image is great. However, the results of that scheme for complex images can still be improved. Therefore, this paper proposed an enhanced interpolation-based hiding scheme by modifying the structure of the CFS from having a single layer to having multiple layers. The secret data are encoded by the multiple-layer folding table to reduce the distortion between the original image and the stego-image. Experimental results show that the image quality and the payload of the proposed scheme are better than those of the other schemes.
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