The strategy of segment transform and the whole wavelet coefficients modification is adopted to improve the robustness of the digital watermark.

This paper adopts watershed transform to segment those images, but this method easily products the over segmentation which results in the edge line buried in disorderly watershed line.

In order to extend the spatial describing ability of ICA basis images, wavelet transform was combined with ICA, which make it be able to segment texture images with large textons.