キャリブレーションずれに強いステレオ視による三次元計測手法の提案

摘要

The accuracy of 3D measurement using stereo method depends strongly on the accuracy of calibration. But, it's very difficult to keep optical systems exactly the same with the calibration condition. For this reason, the measuring system that uses stereo method needs calibration work again and again. To solve this problem, we proposed "relative stereo method" so far. Relative stereo method shows an impressively high accuracy in relative distance, and has a good tolerance to calibration error. However, relative stereo method needs enough length between the camera and measuring objects, so relative stereo method has errors in close range measuring. Therefore, this paper presents a new 3D measurement method which solves the problem of relative stereo method and has a good tolerance to calibration error.%キャリブレーション後の光学系のずれに強い三次元計測rn法として，ステレオ視を用いた新たな手法を提案した。rn実験結果より，提案手法は以下の特徴をもつことが確認rnできた。rn1. 計測原理に用いる三角形の相似関係が，常に正しく保rnたれているため，相対ステレオ法の課題であった近距離でrnの計測における歪みは発生しない。