Method and system for determining the local quality of surface data extracted from volume date

A method for determining the local quality of surface data extracted from a volume data record by means of a surface determination method, wherein the volume data record comprises a three-dimensional matrix of voxels which each have a grayscale value assigned thereto, wherein the surface data comprise a number of surface points extracted from the volume data record and wherein, according to the method, the following is carried out for each surface point:

• a neighborhood is determined in the volume data record,
• at least one quality characteristic is derived from the curve of the grayscale values of voxels from this neighborhood, said quality characteristic characterizing the quality of the respectively considered surface point, and
• the quality characteristic, or each quality characteristic, is output together with coordinates of the respectively considered surface point as a method result.