内容：
针对已有算法嵌入率低、算法过程复杂等问题,提出一种新的可逆数据隐藏算法。算法为了提高信息隐藏率,首先选取直方图中值点两侧的峰值进行数据嵌入。在多次嵌入之后,算法选择中值点位置嵌入所有峰值信息,由于中值点在嵌入后可以直接定位,因此可以实现可逆嵌入与恢复,从而不需要已有算法最低有效位的替换过程,减少了算法过程的复杂性。算法在两个图像集上进行性能测试,先与已有算法进行数据嵌入量比较,接着与MATLAB中3个对比度增强函数进行比较,用于评估算法的嵌入容量以及对比度增强后的图像质量。实验结果表明,所提算法在实现可逆数据隐藏和对比度增强的同时,嵌入容量有较大的提高。 A new method of reversible data concealment is proposed for the problem that the existing algorithm has low embedding rate and complex algorithm process. In order to improve the information hiding rate, we first select the peaks on both sides of the histogram points to embed data. After multiple embedding, the algorithm chooses the midpoint position to embed all the peak information. Since the median point can be directly positioned after embedding, it can realize the reversible embedding and recovery, so that the replacement process of the least significant bit of the existing algorithm is not needed The complexity of the algorithmic process. The algorithm performs the performance test on two image sets, compares it with the existing algorithm, and then compares it with the three contrast enhancement functions in MATLAB to evaluate the embedding capacity of the algorithm and the image quality after contrast enhancement. The experimental results show that the proposed algorithm can improve the embedding capacity while realizing the reversible data hiding and contrast enhancement.

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