Real-time three-dimensional imaging technique

Details Real-time three-dimensional imaging technique Real-time three-dimensional imaging technique

1990-12-03

1992-06-30

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 8, 382 58, 358 88, 356 12, G06K 900

Patent

active

051270617

ABSTRACT:
A three-dimensional image of the surface (12) on an object (14) is obtained in real time by a system (10) which includes first and second reflective surfaces (32,38). The first reflective surface successively reflects a separate one of the first and second lines of light (26,28) onto the surface of the object so that each line of light strikes a first strip of area (34) at an acute angle. The second reflective surface reflects the field of view of a linescan camera (40) onto the object's surface so that the camera captures the image of a second strip of area (41) contiguous with the first strip. The first and second reflective surfaces are rapidly rotated in unison by one or more actuators (50,52) such that the object's surface is spanned by the camera each time the surface is spanned by a successive one of the first and second lines of light. A three-dimensional image of each successive second strip imaged by the camera is obtained from a predetermined relationship between the intensity sensed by the camera for that strip when the corresponding first strip is successively illuminated by the first and second lines of light.

REFERENCES:
patent: 4731853 (1988-03-01), Hata et al.
patent: 4731860 (1988-03-01), Wahl
patent: 4811410 (1989-03-01), Amir et al.
"Experiments with the Intensity Ratio Depth Sensor," B. Carrihill et al., Computer Vision, Graphics, and Image Processing vol. 32, 1985, pp. 337-358.

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