Patent ID: 6219060
Filing Date: 2001-04-17
Classification: G06T

Abstract:
A method of displaying surfaces of anisotropic volumetric data, having data values defining voxels with a spacing between data values in a length, width, height direction being (l, w, h) and having an aspect ratio A, comprising the steps of:a) approximating isotropic data having a modified aspect ratio of A' by interpolating the anisotropic data to create intervening data;b) determining which voxels are surface voxels;c) receiving a viewing angle (azimuth, elevation .gamma.) of a desired view of the surface voxels;d) offsetting the (u,v) locations of the pixel data to new locations (u,v') so as to scale the image according to:E.sub.S =sqrt[(A' cos(.gamma.)).sup.2 +sin.sup.2 (.gamma.)];(u,v')=(u, E.sub.S *v),where .gamma. is elevation of the desired viewing angle; ande) rendering the surface voxels and surface normal vectors at the desired viewing angle (azimuth, elevation .gamma.) as screen pixel data each having an (u,v') screen location, pixel color, and intensity as viewed from a modified viewing angle taking into account said modified aspect ratio, A', as an image to an operator.