Abstract: A novel model-based digital watermarking scheme is proposed in this paper. By the scheme, a discrete wavelet transformation is made to an image, and a group of uniform B-spline curves are defined with the lowest resolution wavelet coefficients as control points, then the bits of watermark signal are embedded into the B-spline curves by disturbing some points of the curves. The strength of watermark is controlled according to the characteristics of human visual system. Supported by experiments, the performance analysis of the proposed scheme is also made in this paper. Experimental results show that this scheme is especially strong in withstanding the attacks of filtering, resizing, sharpening, denoising and JPEG compression.