关键词: 无损数字水印, 无损数据嵌入, Laplacian残差扩展, 可逆整数变换

Abstract: Reversible data embedding has drawn lots of interest recently.The original image can be restored exactly after the embeded data is extracted.In this paper，the author presents a novel reversible data embedding method for digital images based on Laplacian residual difference expansion that can embed and extract the data simply and efficiently，and achieve very high embedding capacity and quality of the image.Furthermore，the process of embedding and extracting is asymmetric and the infomation of the original image is still secret after the hidden data（watermarking） is extracted.The method that present is appropriate to some special scenario.

Key words: lossless digital watermarking, reversible data embedding, Laplacian residual difference expansion, reversible integer transform