A self-embedding watermarking algorithm based on a reference sharing mechanism that has recovery ability under high tampering rates is proposed in this paper. In existing methods, the image recovery ability is often limited under an increasing tampering rate. The proposed method overcomes this limitation by seeking an approximate solution for each character-bit group tampered with. Moreover, the priority assignment of such groups can enhance the accuracy of tampering recovery. Based on this, by using the method proposed in this paper, recovered images always maintain excellent visual quality even at relatively high tampering rates. The experimental results demonstrate the efficacy of the proposed method.

提出了一种基于参考共享机制的自嵌入水印算法，该算法在高篡改率下具有恢复能力。在现有方法中，图像恢复能力通常在篡改率增加的情况下受到限制。所提出的方法通过为被篡改的每个字符位组寻求近似解决方案来克服该限制。此外，此类组的优先级分配可以提高篡改恢复的准确性。基于此，通过使用本文提出的方法，即使在相对较高的篡改率下，恢复的图像也始终保持出色的视觉质量。实验结果证明了该方法的有效性。