Rendering of surfaces from volumetric data employing both dividing and stretching cubes

Anisotropic data having data spacing significantly larger between layers of data compared with spacing between adjacent data values, is supplemented with additional data to approximate isometric data. The ratio of spacing in one dimension to another is referred to as an aspect ratio A. Preferably, s...

Full description

Saved in:
Bibliographic Details
Main Authors LUDKE, SIEGWALT, CLINE, HARVEY ELLIS
Format Patent
LanguageEnglish
French
German
Published 27.12.2006
Subjects
CALCULATING
COMPUTING
COUNTING
DIAGNOSIS
HUMAN NECESSITIES
HYGIENE
IDENTIFICATION
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
MEDICAL OR VETERINARY SCIENCE
PHYSICS
SURGERY
Online AccessGet full text

Cover

More Information
Summary:Anisotropic data having data spacing significantly larger between layers of data compared with spacing between adjacent data values, is supplemented with additional data to approximate isometric data. The ratio of spacing in one dimension to another is referred to as an aspect ratio A. Preferably, spacing is halved until spacing a modified aspect ratio A' is near unity. Intermediate values are interpolated between existing values of the anisotropic data to create approximate isotropic data having a modified aspect ratio A'. Surface voxels are determined from the approximate isotropic data. The values of the adjacent voxels are then used to determine a vector normal to the surface at the central voxel. This is repeated for a number of central voxels to determine a surface. The viewing elevation angle is converted to an effective elevation angle. The surface is then rendered into a 2D screen image as if it were created from isotropic data. The resulting distorted 2D image is then stretched by an amount related to the approximate aspect ratio A' to result in a high-resolution non-distorted image. The surface then may be displayed.
Bibliography:Application Number: EP19990308106