关键词: 信息隐藏, 数字水印, 鲁棒水印, 易损水印

Abstract: It is studied that the problems in embedding multiple watermarks simultaneously, and proposed an image watermarking scheme which embedded fragile and robust watermarks at the same time. This algorithm, which is based on integer wavelet transform, is public watermarking scheme, both of the two kinds of watermarks can be retrieved without knowing the original image. For retrieving the watermarks, the author proposed a “credible bit” method, which could enhance the robustness of the watermarks. Meanwhile, besides telling you whether an image has been tampered, the fragile watermark could as well, reflect the distortion status in both spatial and frequency domain of the image.

Key words: data hiding, digital watermarking, robust watermarking, fragile watermarking