Accession Number : ADA132392

Title :   Generating Three-Dimensional Surface Models of Solid Objects from Multiple Projections.

Descriptive Note : Technical rept.,


Personal Author(s) : Potmesil,Michael

PDF Url : ADA132392

Report Date : Oct 1982

Pagination or Media Count : 257

Abstract : A recurring problem in computer vision and related fields is that of generating computer models of physical objects. This thesis presents a method for constructing such models in the form of three-dimensional surface or volume descriptions. The surface models are composed of curved, topologically rectangular, parametric patches. The data required to define these patches are obtained from multiple photographic images of the object illuminated by a rectangular pattern of lines. The projection of the pattern on the surface of the object traces curves which define the boundaries of the patches. The 3D description of the patches is reconstructed by photogrammetric techniques from two or more images of the projected pattern. A calibration stand, in which the object is placed, permits determination of the camera geometry directly from image data. Once the surface descriptions are in the same object space, they are also merged into a common parameter space. This match-and-merge process is iteratively repeated for pairs of surface descriptions until a complete model of the object is assembled.

Descriptors :   *Computer graphics, *Computer aided design, Three dimensional, Pattern recognition, Photographic images, Image processing, Projective techniques, Models, Surfaces, Interactive graphics

Subject Categories : Numerical Mathematics

Distribution Statement : APPROVED FOR PUBLIC RELEASE