Abstract: The paper proposes a method that embeds the result of watermark-decomposing by rows or columns operates in spatial and frequency domain respectively into a digital document.The strategy of watermark-decomposing used in this algorithm ensures the integracy of decomposed watermark image.Experimental results demonstrate that thanks to the combination of spatial and frequency domain，the watermark has greater robustness than those used spatial or frequency domain alone to signal processing techniques and geometric distortions.

摘要： 提出了一种按行或列分解水印图像的策略，将其分别嵌入空间域和频率域。该算法中的水印分解策略充分保证了提取的水印图像的完整性。由于空间域和频率域方法的结合，该算法较单一的空间域和频率域算法，具有更好的抗几何变换和噪声攻击的能力。