In traditional steganographic schemes, RGB three channels payloads are assigned equally in a true color image. In fact, the security of color image steganography relates not only to data-embedding algorithms but also to different payload partition. How to exploit inter-channel correlations to allocate payload for performance enhancement is still an open issue in color image steganography. In this paper, a novel channel-dependent payload partition strategy based on amplifying channel modification probabilities is proposed, so as to adaptively assign the embedding capacity among RGB channels. The modification probabilities of three corresponding pixels in RGB channels are simultaneously increased, and thus the embedding impacts could be clustered, in order to improve the empirical steganographic security against the channel co-occurrences detection. The experimental results show that the new color image steganographic schemes, incorporated with the proposed strategy, can effectively make the embedding changes concentrated mainly in textured regions, and achieve better performance on resisting the modern color image steganalysis.

中文翻译：

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彩色图像隐写术中一种新的有效载荷划分策略

在传统的隐写方案中，RGB 三通道有效载荷在真彩色图像中被平均分配。事实上，彩色图像隐写术的安全性不仅与数据嵌入算法有关，还与不同的有效载荷分区有关。如何利用通道间相关性来分配有效载荷以增强性能仍然是彩色图像隐写术中的一个悬而未决的问题。在本文中，提出了一种基于放大通道修改概率的新型通道相关有效载荷划分策略，以便在 RGB 通道之间自适应地分配嵌入容量。同时增加RGB通道中三个对应像素的修改概率，从而可以将嵌入影响聚类，以提高针对通道共现检测的经验隐写安全性。