THREE-DIMENSIONAL SHAPE MEASURING SYSTEM, THREE-DIMENSIONAL SHAPE MEASURING METHOD, AND THREE-DIMENSIONAL SHAPE MEASURING PROGRAM

• Main Author: SUMIYOSHI SHINICHI
• Format: Patent
• Language: English; Japanese
• Published: 06.02.2020
• Subjects: CALCULATING; COMPUTING; COUNTING; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; TESTING

To provide a three-dimensional shape measuring system, a three-dimensional shape measuring method and a three-dimensional shape measuring program with which it is possible to measure a three-dimensional shape applying a TDC method, even when there is interreflection light on an object having strong specularity.SOLUTION: A three-dimensional shape measuring system 100 comprises: a video projection unit for sequentially projecting an encoded pattern image string consisting of multiple kinds of encoded pattern images; a fast imaging unit for sequentially imaging an object W to which the encoded pattern images are projected by the video projection unit and acquiring a captured image string consisting of a plurality of captured images; an interreflection compatible decoding unit for performing a decoding that is compatible with interreflection using the encoded pattern image string and the captured image string; and a three-dimensional shape measurement unit for associating the encoded pattern images with the captured images using the result of decoding by the interreflection compatible decoding unit and the geometrical relation of the video projection and fast imaging units and thereby measuring the three-dimensional shape of the object W.SELECTED DRAWING: Figure 1 【課題】ＴＤＣ法を応用して、鏡面性の強い対象物における相互反射光がある場合にも３次元形状を計測できる３次元形状計測システム、３次元形状計測方法、及び３次元形状計測プログラムを提供する。【解決手段】３次元形状計測システム１００は、複数種類の符号化パターン画像からなる符号化パターン画像列を順に投影する映像投影部と、映像投影部にて符号化パターン画像が投影される対象物Ｗを順に撮像して、複数の撮像画像からなる撮像画像列を取得する高速撮像部と、符号化パターン画像列及び撮影画像列を用いて、相互反射に対応した復号化を行う相互反射対応復号化部と、相互反射対応復号化部における復号化の結果及び映像投影部と高速撮像部との幾何的関係を用いて、符号化パターン画像と撮影画像との対応付けを行うことで対象物Ｗの３次元形状を計測する３次元形状計測部とを備える。【選択図】図１