As the multi-resolution property of DWT enable DWT-based watermark system combine the statistic characteristic of image with human visual system, make it possible to find an optimal system.

• DWT的多分辨率特性可以将人眼视觉特性与图像的统计特性结合起来，为设计最优的水印系统提供了一种可能，具有更大的发展空间。