Method of rendering a surface from a solid graphical image

Details Method of rendering a surface from a solid graphical image Method of rendering a surface from a solid graphical image

G - Physics

06

T

G06T 17/00 (2006.01)

Patent

CA 2622718

A method for transforming solid, three dimensional image data into three dimensional surface data first smoothes the surface of the solid image by removing (210) extraneous voxels both attached to main surface of the solid image as well as extraneous voxels about the main image before the surface transformation. Once the solid image is transformed into a surface image, the method again cleans the surface by removing (840) any significantly spiked structures that appear out of place when considered with respect to the surrounding topography. The amount of data required to render the surface image is reduced by removing (130) surface facets that fall within a planar threshold of the surrounding topography. The topography is also compressed in local areas to bring the topography toward a median level. The method may further cycle (140) to attempt to reduce additional surface facets that may fall now within the threshold limit.

L'invention concerne un procédé permettant de transformer des données d'image tridimensionnelle solide en de premières données de surface tridimensionnelle, qui aplanit la surface de l'image solide par élimination (210) à la fois des voxels étrangers fixés à la surface principale de l'image solide et des voxels étrangers entourant l'image avant la transformation de surface. Une fois que l'image solide est transformée en une image de surface, le procédé permet de nettoyer une seconde fois la surface par élimination (840) de structures quelconques significativement dentées qui apparaissent mal placées par rapport à la topographie environnante. La quantité de données requises pour rendre l'image de surface est réduite par élimination (130) de facettes de surface qui atteignent un seuil planaire de la topographie environnante.Cette topographie est également compressée dans des zones locales afin de l'amener à un niveau médian. Ledit procédé peut également fonctionner de manière cyclique (140) afin de limiter les facettes de surface supplémentaires qui peuvent atteindre maintenant la limite de seuil.

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