| 摘要 |
An apparatus for creating a three-dimensional perspective image of an object surface. The apparatus includes a laser, a computer system and a video camera with a sensor matrix. The laser is moved to a plurality of positions to project a light ray upon an object surface. Each projected light ray is parallel to the optical axis of the video camera. The sensor matrix of the video camera detects an image area corresponding to each one of the projected light rays. The computer system identifies an image point from each image area, calculates an image of the object surface defined by three-dimensional grid coordinates and transforms the image coordinates into three-dimensional coordinates which define the real object surface. In another embodiment, a number of lasers are arranged in an array to project parallel light rays upon the object surface. The lasers are actuated according to a predetermined sequence to project parallel light rays upon the object surface one at a time. In yet another embodiment, a plane of laser light may be directed on the object surface to produce a laser stripe on the object and an image stripe in the sensor matrix. Each point of the image stripe is correlated with a laser point and three-dimensional grid coordinate is calculated from the points of the image stripe and the corresponding laser points.
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