THREE-DIMENSIONAL SHAPE MEASURING DEVICE

• Main Authors: ADACHI TAKASHI, KAWASAKI HIROSHI, OYAGI YASUYUKI, NAGAEDA HIROSHI, FURUKAWA AKIRA, INAZUKI YUICHI
• Format: Patent
• Language: English; Japanese
• Published: 23.01.2024
• Subjects: CALCULATING; COMPUTING; COUNTING; DIAGNOSIS; HUMAN NECESSITIES; HYGIENE; IDENTIFICATION; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; MEDICAL OR VETERINARY SCIENCE; PHYSICS; SURGERY; TESTING

To provide a three-dimensional shape measuring device that can reduce the burden in calculation processing, and also provide a three-dimensional shape measuring device that can perform more accurate measurements.SOLUTION: A three-dimensional shape measuring device 1 includes: a projection unit 20 configured to project, onto a measurement object, a measurement pattern 21 composed of a graph having nodes and edges that have characteristics distinguishable by the connection state of line segments; an imaging unit 30 configured to capture an image of the measurement pattern 21 projected onto the measurement object; and a calculation unit 120 configured to calculate a three-dimensional shape of the measurement object based on the image captured by the imaging unit 30. The measurement pattern 21 projected by the projection unit 20 has a lattice pattern that is distorted into a pincushion shape when projected onto a plane from the normal direction of the plane.SELECTED DRAWING: Figure 4 【課題】演算処理の負担を軽減することができる３次元形状計測装置を提供する。また、より精度の高い計測を行うことができる３次元形状計測装置を提供する。【解決手段】３次元形状計測装置１は、線分の接続状態によって区別可能な特徴を有するノードとエッジとを有するグラフから構成される計測用パターン２１を計測対象に投影する投影部２０と、計測対象に投影された計測用パターン２１を撮影する撮影部３０と、撮影部３０による撮影画像に基づいて計測対象の３次元形状を演算する演算部１２０と、を備え、投影部２０が投影する計測用パターン２１は、平面上へ平面の法線方向から投影した場合に糸巻型に歪曲した格子パターンを有する。【選択図】図４