论文标题
可逆数据隐藏着双像素 - 值排序和1mmimist的预测错误扩展
Reversible data hiding with dual pixel-value-ordering and1minimum prediction error expansion
论文作者
论文摘要
像素值排序（PVO）拥有高保真可逆数据隐藏（RDH）的令人印象深刻的属性。在本文中，我们引入了一个双PVO（DPVO），以进行预测误差扩展（PEE），从而开发了一种新的RDH方案，以提供更好的利率延伸性能。特别是，我们建议嵌入两个阶段：向前和向后。在远期阶段，使用经典小便的PVO应用于大小1x3的每个非重叠的图像块。在向后阶段，从远期阶段预测的像素确定最小设定和最大像素。最小值集仅包含最低的预测像素，最大设置包含每个图像块的最大预测像素。然后将使用PPEE的DPVO应用于这两个集合，以便增加最小设置的像素值，并通过单位值降低最大集合的像素值。因此，向前嵌入中预测的像素可以部分恢复到其原始值，从而导致较高的图像质量和更高的嵌入速率。实验结果记录了我们方案的有希望的利率延伸性能，与流行和最先进的基于PVO的RDHSchemes相比，嵌入率更高的嵌入式图像质量的显着提高。
Pixel Value Ordering (PVO) holds an impressive property for high fidelity Reversible Data Hiding (RDH). In this paper, we introduce a dual-PVO (dPVO) for Prediction Error Expansion(PEE), and thereby develop a new RDH scheme to offer a better rate-distortion performance. Particularly, we propose to embed in two phases: forward and backward. In the forward phase, PVO with classic PEE is applied to every non-overlapping image block of size 1x3. In the backward phase,minimum-set and maximum-set of pixels are determined from the pixels predicted in the forward phase. The minimum set only contains the lowest predicted pixels and the maximum set contains the largest predicted pixels of each image block. Proposed dPVO withPEE is then applied to both sets, so that the pixel values of the minimum set are increased and that of the maximum set are decreased by a unit value. Thereby, the pixels predicted in the forward embedding can partially be restored to their original values resulting in both better-embedded image quality and a higher embedding rate. Experimental results have recorded a promising rate-distortion performance of our scheme with a significant improvement of embedded image quality at higher embedding rates compared to the popular and state-of-the-art PVO-based RDHschemes.
