Portable 3-D scanning system and method for rapid shape digitizing and adaptive mesh generation
US5870220A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 1996 |
| Grant date | Feb 9, 1999 |
| Priority date | — |
| Expiry date | Jul 12, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T9/001
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A portable 3D scanning system collects 2D-profile data of objects using a combination of a laser-stripe positioning device and a video camera which detects the images of the laser stripe reflected from the object. The scanning system includes a laser-stripe generator, a video camera, a scanning mirror attached to a continuously rotating motor, an encoder or a photodiode operationally coupled to the motor, and associated electronics. As the rotating, scanning mirror reflects the laser stripe and variably positions the laser stripe across the object, the encoder or the photodiode generates signals indicating the angular position of the mirror. The video images of the reflected laser stripes are stored on a storage medium, while data relating to the angular positions of the laser stripes recorded in the video images are simultaneously stored on a storage medium. A computer subsequently synchronizes and processes the recorded laser stripe data with the angular-position data to generate a 3D model of the object by applying triangulation calculation and other post-scanning methods, e.g., multi-resolution analysis and adaptive-mesh generation. The multi-resolution analysis, which applies …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.