| 摘要 |
Object of the present invention is to generate highly reliable three-dimensional data. The invention provides a method and an apparatus for measuring a three dimensional position of a point on an object by calculating a centroid of a temporal distribution or a spatial distribution of a light reception amount based on a set of light reception data indicating light reception intensity of a light reflected at the object. The three-dimensional measurement apparatus comprises a calculator for calculating a centroid based on the light reception data exceeding a threshold value, a setting section capable of varying the threshold value and a judgment section for determining a difference between a centroid based on the light reception data exceeding a threshold value and a centroid based on the light reception data exceeding another threshold value and judging if the centroids are correct or not based on the difference.
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