针对HPDH-LZW算法在隐藏信息时未能充分利用压缩编码数据空间问题,通过对压缩编码数据空间进行细分,在不同的子空间里隐藏不同数量的秘密信息,实现了一种改进的基于LZW压缩编码的可逆信息隐藏方法.实验表明,与原算法相比,该算法没有增大压缩文件,也没有增加计算复杂度,但具有更大的信息隐藏容量.%The compression codes data space could not be full used in scheme of HPDH-LZW.Subdividing the compression codes data space and hiding different number of secret data in different subspaces could solve this problem and realized an improved reversible data-hiding scheme for LZW codes.Experiments show that the proposed scheme has a greater data hiding capacity compared HPDH-LZW scheme without increasing the size of the compression file and computational complexity.
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