DEM fragile watermark integrity authentication method considering topographic features

The invention discloses a DEM fragile watermark integrity authentication method considering topographic features, and the method comprises the processes of generation of fragile watermark information, embedding of the fragile watermark information, and detection of the fragile watermark information. The method is based on a fragile watermark theory, fully considers the topographic features of DEM, and realizes integrity authentication of DEM data. The invention effectively reduces the influence of watermark embedding on DEM carrier data while the integrity of the DEM data is accurately authenticated.