Abstract: Based on dividing blocks Curvelet transform, according to the change of the coefficients in detail scale layers keep energy conservation in the ridge domain, the secret message can be inserted through blocks energy quantization, it is block quantification embeds secret information. This paper presents an information hiding algorithm which is blind to extraction and robust to common attacks, especially to JPEG. Experimental results show that it can improve the secret message capacity, and suit to covert commutation against JPEG attack, which inserts messages in detail1 and detail2 scale layers. It can obtain more strong robustness to semi-fragile watermark which inserts messages only in detail1 scale layers.

Key words: information hiding, digital watermark, Curvelet transform

摘要： 基于图像分块的Curvelet变换，根据Detail尺度层系数变化在脊形区域内能量守恒的特点，块量化嵌入秘密信息，提出一种鲁棒性较好的盲提取信息隐藏算法。实验结果表明，该算法选择Detail1和Detail2尺度层可以提高嵌入容量，适应于抗JPEG压缩的隐蔽通信；仅选择Detail1尺度层嵌入可以获得更强的鲁棒性，满足半易碎数字水印的要求。

关键词: 信息隐藏, 数字水印, Curvelet变换

CLC Number: 

• TP393