Apparatus for preprocessing image data
AssigneeDio Corporation
InventorsJin Cheol Kim, Jin Baek Kim
Life of this patent
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Abstract
The present invention provides an apparatus for preprocessing image data, comprising: a preprocessor for reducing a mesh resolution of an oral scan image to a reference resolution; a start line detector for detecting, from the preprocessed oral scan image, a start line corresponding to a bottom of a gum area; a boundary line detector for detecting, from the preprocessed oral scan image, a boundary line between a dental area and a gum area; and an area separator for separating a gum area from the oral scan image by using the start line and the boundary line.
Claims15
An apparatus for preprocessing image data for image registration, the apparatus comprising a controller, the controller is configured to:
- reduce a mesh resolution of an oral scan image to a reference resolution;
- detect, from the preprocessed oral scan image, a start line corresponding to a bottom of a gum area;
- calculate a maximum curvature and a minimum curvature between adjacent meshes of the oral scan image, and calculates at least one of a Gaussian curvature and an average curvature by using the calculated maximum and minimum curvatures;
- select meshes having at least any one of the calculated Gaussian curvature and the average curvature equal to or greater than a reference curvature, and determines a vertex shared by the selected meshes as a boundary point;
- detect, from the preprocessed oral scan image, a boundary line between a dental area and a gum area;
- and
- separate a gum area from the oral scan image by using the start line and the boundary line.
Dependencies are inferred from the claim text.