Importance

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Abstract

XYZ coordinates of an object are measured by projecting pulse slit light onto the object, imaging the slit line formed on the surface of the object by a TV camera, and processing the video signal from the camera according to the scanning signals from the camera. The position of the slit line on the camera is detected, based on the weighted average of the intensity values of the video signal. The relation of the position of the slit line to the actual XYZ coordinates on the object has been previously established, taking account of the distortion of the lens of the TV camera and stored in a look-up table. Data read from this table is stored in a memory in synchronism with the projection of each pulse slit light. The XYZ coordinates on the object can be accurately detected even though its physical position varies at a high speed or its reflectivity changes widely.

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First Claim