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数字水印是嵌入在数字图象中看不见的的标记,以此来保证数字图象的版权不受侵犯。文章提出一种基于离散小波变换的图象水印化方法,用这种方法加入的水印图象不受图象旋转、放大和弹性变形的影响。
Digital watermarks are embedded in digital images can not see the mark, in order to ensure that digital image copyright infringement. In this paper, an image watermarking method based on discrete wavelet transform is proposed. Watermarking images added by this method are not influenced by image rotation, magnification and elastic deformation.