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AssigneeMental Images GmbH
InventorsRolf Herken, Thom-Michael Thamm
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A computer graphics system generates a three-dimensional model of an object in an interactive manner under control of an operator. An initial model for the object to be modeled is displayed to the operator as illuminated from a particular illumination direction and projected onto an image plane. The operator can update shading of a pixel on the image plane, and, based on the updated shading, the computer graphics system generates an updated normal vector for the updated pixel, which identifies the normal of the surface of the object projected onto the updated pixel. Using the updated normal vector field and a height field, which represents the height of the respective portion of the object as projected onto the respective pixels of the image plane, the computer graphics system generates an updated height value for the updated pixel, thereby to update the height field. The updated normal vector field and the updated height field define the updated model of the object, which corresponds to the updated shape of the object as updated based on the updated shading. The computer graphics system can then display to the operator an image of the object as defined by the updated model. If the updated model is satisfactory, the computer graphics system saves the updated model as the final model. On the other hand, if the updated model is not satisfactory, the operator can further update the shading and enable the computer graphics system to generate a further updated normal vector field and updated height field, thereby to generate a further updated model for the object. The operations can be repeated until the operator determines that the object is satisfactory.
A computer graphics system for generating a geometrical model representing geometry of at least a portion of a surface of a three-dimensional object by shading by an operator in connection with a two-dimensional image of the object, the image representing the object as projected onto an image plane, the computer graphics system comprising:
A computer implemented graphics method for generating a geometrical model representing geometry of at least a portion of a surface of a three-dimensional object by shading by an operator in connection with a two-dimensional image of the object, the image representing the object as projected onto an image plane, the method comprising the steps of:
A computer graphics computer program product for use in connection with a computer for generating a geometrical model representing geometry of at least a portion of a surface of a three-dimensional object by shading by an operator in connection with a two-dimensional image of the object, the image representing the object as projected onto an image plane, the computer graphics computer program product comprising a computer-readable medium having encoded thereon:
Dependencies are inferred from the claim text.