A multifunctional watermarking algorithm for color image is presented based on the rapport of wavelet coefficients and the choice swatch method; so robust watermark and fragile watermark exist in an image.

• 利用层间小波系数的关系；并结合新颖的样本选取方法提出了一种多功能彩色图像数字水印嵌入方法；使鲁棒数字水印和易碎数字水印共存于同一图像中.