With the continuous improvement of encryption algorithms, some applications based on the architecture of wireless visual sensor networks have gradually shifted their attention to the imperceptibility and antijamming performance of secret images. To reduce the probability of secret images being detected, the current research focuses on hiding secret data in the least-significant bit of the cover image in the spatial domain or embedding data into the coefficients of the high-frequency band in the transformational domain, which usually leads to poor performance in a hostile environment. Therefore, some researchers proposed to substitute the coefficients of the medium-frequency band in the transformational domain with secret information to enhance the anti-interference performance. However, this idea would severely affect the imperceptibility of secret images. As a result, an improved version based on the partial preservation embedding algorithm was designed in this paper. Theory analysis and simulation results indicate that the proposed scheme performs better than the existing methods by directly substituting the coefficients of the medium-frequency band in the transformational domain, especially in the case of strong noise interference.

中文翻译：

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基于部分保存嵌入算法的无线视觉传感器网络图像隐写改进方案

随着加密算法的不断改进，基于无线视觉传感器网络体系结构的一些应用程序已逐渐将其注意力转移到秘密图像的不可感知性和抗干扰性能上。为了降低秘密图像被检测到的可能性，当前的研究重点是在空间域中将秘密数据隐藏在封面图像的最低有效位中，或者在变换域中将数据嵌入到高频带的系数中，从而通常会导致在敌对环境中的性能不佳。因此，一些研究者提出用秘密信息代替变换域中频带的系数，以提高抗干扰性能。然而，这个想法将严重影响秘密图像的不可感知性。因此，本文设计了一种基于部分保存嵌入算法的改进版本。理论分析和仿真结果表明，所提出的方案通过直接替换变换域中的频带系数，比现有方法具有更好的性能，特别是在强噪声干扰的情况下。