title: Three-dimensional profiling using the Fourier transform method with a hexagonal grating projection.
abstract: We present three-dimensional profilometry based on triangulation in which a hexagonal pattern is projected on the object. To obtain an accurate result with a one-shot photographic image, the Fourier transform method and method of excess fraction are adopted. The three grating components of the hexagonal pattern are used. For compactness a new pattern projection scheme is introduced. The experimental results show that the constructed optical system works well for measuring the profile of a mannequin with a height resolution of ~ +/- 1 mm.
authors.affiliation: Technology Research Institute of Osaka Prefecture, Osaka, Japan. k-iwata@tri.pref.osaka.jp
authors.forename: Koichi
authors.initials: K
authors.lastname: Iwata
authors.forename: Fuminori
authors.initials: F
authors.lastname: Kusunoki
authors.forename: Kousuke
authors.initials: K
authors.lastname: Moriwaki
authors.forename: Hiroki
authors.initials: H
authors.lastname: Fukuda
authors.forename: Takaharu
authors.initials: T
authors.lastname: Tomii