关键词: 信息隐藏, 隐写, 位平面复杂度分割, 预处理, 直方图

Abstract: Since Bit-Plane Complexity Segmentation (BPCS) steganography is vulnerable to complex histogram attack, this paper proposed an improved algorithm based on preprocessing. The steganography derived compensatory rule from distribution of the cover image. Then it used reversed preprocessing in compensation to the change of complexity caused by embedded information. The experimental results show that the proposed algorithm can properly hide information and counteract the attack of complex histogram. The compensation happens before information hiding, so it can maintain the big capacity characteristic of the original algorithm.

Key words: information hiding, steganographic, Bit-Plane Complexity Segmentation (BPCS), preprocessing, histogram