Rosman, Guy | Search NASA

DOE OSTI2019

System and method for adaptive range 3D scanning

A scanner system is configured for acquiring three dimensional image information of an object. The scanner includes a projector, a camera, a graphics processing device, and a processor. The projector projects one of several pre-defined patterns upon the object. The camera captures an image from the object, which is received by the processor. The processor approximates mutual information from the object and the pattern using the graphics processing device, and selects a second pattern for projecting on the object.

Rosman, Guy↗

DOE OSTI2017

System and method for extracting dominant orientations from a scene

In one embodiment, a method of identifying the dominant orientations of a scene comprises representing a scene as a plurality of directional vectors. The scene may comprise a three-dimensional representation of a scene, and the plurality of directional vectors may comprise a plurality of surface normals. The method further comprises determining, based on the plurality of directional vectors, a plurality of orientations describing the scene. The determined plurality of orientations explains the directionality of the plurality of directional vectors. In certain embodiments, the plurality of orientations may have independent axes of rotation. The plurality of orientations may be determined by representing the plurality of directional vectors as lying on a mathematical representation of a sphere, and inferring the parameters of a statistical model to adapt the plurality of orientations to explain the positioning of the plurality of directional vectors lying on the mathematical representation of the sphere.

97 MATHEMATICS AND COMPUTING↗