Wire-frame model

Abstract: A formalism is described for the statistical combination of geometrical information from multiple sensors. This is illus trated by its applications to stereo vision, including the com bination of multiple stereo views to increase the accuracy of a wire frame model and the consistent imposition of geometri cal constraints on such a model.

Abstract: A method, system and computer-readable medium for converting objects in two-dimensional images into three-dimensional objects. Vanishing points for an object selected from a digitized two-dimensional perspective image are determined. Then, a three-dimensional coordinate space for the selected object is derived based on the determined vanishing points. The system then generates a three-dimensional object in the generated three-dimensional coordinate space based on user-designated vertices at significant features of the selected object in the two-dimensional perspective image. The three-dimensional coordinate space and three-dimensional object are generated using non-linear optimization algorithms. The system extracts surface texture information from the two-dimensional images and maps the extracted texture information onto the generated three-dimensional object. The system also converts multiple three-dimensional objects created from two-dimensional images of a single object into a single three-dimensional object. A set of conjugate vertices, vanishing lines and/or planes sufficient for the determination of the relative orientations of two or more precreated three-dimensional objects are identified between precreated two or more three-dimensional objects. Then, the precreated two or more three-dimensional objects are merged into a single three-dimensional object based on the identified set of conjugate vertices, vanishing lines or planes and a non-linear optimization algorithm.

Abstract: A computer implemented method animates a 3D physical object by first acquiring a 3D graphics model of the object. The model is edited with graphics authoring tools to reflect a desired appearance of the object. The edited model is rendered as an image considering a user location and a location of a virtual light. Then, intensity values of the image are corrected according to an orientation of a surface of the object and a radiance at the surface. The 3D physical object can finally be illuminated with the corrected image to give the 3D physical object the desired appearance under the virtual light when viewed from the user location.

Abstract: A method and apparatus for determining a specified physical characteristic in an object exposes the object to at least two angularly fixed sources of electromagnetic radiation to create projected images of the object. The sources are rotationally scanned about the object so as to oscillate in an angular range about the object. The sources are relatively stationary to one another. A three dimensional reconstructed image of the object based on the projected images of the object is created and examined for a specified physical characteristic in the object.