提出一种无损信息隐藏方法，接收端不但可以提取额外嵌入的秘密信息，而且可以无损恢复原始图像。
A novel lossless data-hiding scheme is presented by which the original image can be restored without error after extraction of an embedded message.
因此迫切需要一种既能有效地避免破坏原始数据信息，又能通过隐藏信息发挥作用的新方法——无损信息隐藏方法。
Therefore, it is desirable to design a new type of data hiding method-reversible data hiding, which can avoid distorting the original data and exert its benefits.
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