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中文摘要：
使用JPEG图像的DCT系数作为隐藏载体，通过一种改进的量化嵌入算法提高了信息隐藏的容量．算法以基于结构相似度的图像质量指标作为图像的失真度量，以最速下降法选择嵌入算法中的控制参数，保证了数据嵌入后的图像具有较低的失真水平．实验结果表明本文提出的算法提高了信息隐藏的容量，并较好地平衡了失真和容量之间的关系．
英文摘要：
The DCT coefficients of JPEG images are used as the hiding carrier, and the information hiding capacity gets increased by a modified quantization-based embedding method. The algorithm takes the structural-similarity- based image quality index as the image distortion measurement, and Uses steepest descent method to choose the control parameters embedded into the algorithm, enabling the embedded image to have less distortions. The experimental results indicate that the proposed method can improve the information hiding capacity, and find an equilibrium between capacity and distortion.
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