Object Recreation from Facet Representation to IGES and Primitive Representations
Agency / Branch:
DOD / MDA
Accurate geometric and mathematical modeling of three-dimensional object shapes is a critical component of a variety of applications, ranging from design and manufacturing, to modeling and simulation. The models used in these applications may be created using interactive Computer Aided Design (CAD) tools, by hand-editing geometry configuration files, as the outputs of automated systems such as laser ranging scanners, computer-vision-based shape-from-motion techniques, or optimized design codes. While some model formats allow higher-level representations, combining geometric primitives or bounded surfaces to represent the final 3D shape, many model sources or existing model collections contain only lower-level representations such as a facets or meshes. While conversion from higher-level to lower-level representations is common using facetization or meshing techniques, this research effort focuses on the inverse problem of generating higher-order shape representations from faceted models. This requires recognizing groups of facets that collectively represent higher-order surfaces such as cylinders, spheres, cones, and lofted curved surfaces; mathematically fitting surface equations to those facets to determine the characteristic shape parameters; and exporting the high-order representations to formats that modeling, simulation, and analysis tools can process. These techniques will enable smooth surface CAD models to be created automatically from roughly triangulated input geometries.
Small Business Information at Submission:
STELLAR SCIENCE LTD.CO
401 Serenity Ct SE Albuquerque, NM 87123
Number of Employees: