EMBEDDING METHOD FOR THREE-DIMENSIONAL DIGITAL MODEL DUAL LAYER BLIND WATERMARK, EXTRACTING METHOD FOR THREE-DIMENSIONAL DIGITAL MODEL DUAL LAYER BLIND WATERMARK, AND STORAGE MEDIUM

摘要

The present invention provides an embedding method for a three-dimensional digital model dual layer blind watermark, an extracting method for the three-dimensional digital model dual layer blind watermark, and a storage medium. The embedding method comprises: filtering a first type of vertices from a three-dimensional digital model according to a first-layer watermark embedding condition; obtaining a pixel point feature attribute of a two-dimensional image used as a first-layer watermark; adjusting corresponding positions of the first type of vertices according to the pixel point feature attribute in the three-dimensional digital model; filtering a second type of vertices meeting a preset condition from the adjusted three-dimensional digital model; selecting a two-ring neighborhood of vertex meeting a second-layer watermark embedding condition from two-ring neighborhood of vertices of the second type of vertices; obtaining a numerical sequence used as a second-layer watermark, the numerical sequence comprising values at different numerical digits; and when the position of the selected two-ring neighborhood of vertex corresponding to a numerical digit does not match a value at the corresponding numerical digit, adjusting the position of the two-ring neighborhood of vertex corresponding to the numerical digit to match the value.