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中文摘要：
提出一种基于DCT域中低频系数能量区域的鲁棒性水印算法（Watermarking based on Energy Region and Texture Feature,WET）,主要通过调制中低频DCT系数能量关系来嵌入水印.在能量调制过程中,系数的修改幅度由图像纹理特征和能量调制模型来控制.该算法水印容量大,复杂度低,可实现在一幅512×512图像中嵌入8192bit水印信息.实验表明,算法具有良好的视觉不可见性,对一些常见的攻击（如高斯噪声、低通滤波、JPEG压缩等）和部分几何攻击（剪切）具有较好的鲁棒性.
英文摘要：
In this paper, a robust algorithm WET based on modulating the low-mid frequency DCT coefficients energy relationship to embed watermark is proposed. During the modulation, a theorem deduced from the texture features and energy modulation model is employed to restrict the modified magnitude of coefficients. This system is of large data pay- load and high computational efficiency, and is capable of embedding 8192 bits of information in images with dimensions 512×512 pixels. Experimental results indicate that the presented scheme is transparent and robust to significant volu- metric distortions （including additive noise,low-pass filtering and lossy compression） and a part of geometric distortions.
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