【摘要】 可逆信息隐藏技术可为云服务、医学、司法等特殊场合的安全应用提供保证，该技术不仅能实现对机密的信息的隐藏，而且能完整地恢复出原始载体。本文针对图像的可逆信息隐藏技术，提出了预测误差与中值扩展的可逆信息隐藏算法。该算法通过Z字窗口预测误差，通过预测误差直方图的峰值点与中值点进行秘密信息嵌入。实验结果表明，该算法的性能评价指标隐藏容量大、透明性较好，鲁棒性强。更多还原

【Abstract】 Reversible information hiding technology can provide security guarantees for special applications such as cloud services, medicine, and justice. This technology not only enables the hiding of confidential information,but also fully restores the original carrier. This paper proposes a reversible information hiding algorithm based on prediction error and median expansion for image reversible information hiding technology. The algorithm predicts the error through the Z-window, and embeds the secret information through the peak and median points of the prediction error histogram. The experimental results show that the performance evaluation index of the algorithm has large hiding capacity, good transparency and strong robustness.更多还原