公开(公告)号：US20180313645A1

公开(公告)日：2018-11-01

申请号：US16014515

申请日：2018-06-21

Applicant: CKD Corporation

Inventor： Nobuyuki Umemura ,  Tsuyoshi Ohyama ,  Norihiko Sakaida ,  Manabu Okuda

IPC: G01B11/25 ,  G01B11/02

CPC classification number: G01B11/2527 ,  G01B11/02 ,  G06T7/521 ,  G06T7/55

Abstract: A three-dimensional measurement device includes: a projector including: a light source that emits a predetermined light; a grid that converts the light from the light source into a predetermined striped pattern; and a driver that moves the grid, and the projector projecting the striped pattern onto a measurement object; an imaging device that takes an image of the measurement object on which the striped pattern is projected; and a controller that: controls the projector and the imaging device to obtain a plurality of image data having different light intensity distributions; executes three-dimensional measurement of the measurement object by phase shifting based on the image data having different light intensity distributions; and obtains each of the image data among the image data having different light intensity distributions.

公开(公告)号：US20180112974A1

公开(公告)日：2018-04-26

申请号：US15849911

申请日：2017-12-21

Applicant: CKD Corporation

Inventor： Tsuyoshi Ohyama ,  Norihiko Sakaida ,  Takahiro Mamiya ,  Hiroyuki Ishigaki

IPC: G01B11/25 ,  G06T7/00 ,  G06T7/60

CPC classification number: G01B11/2513 ,  G01B11/0608 ,  G01B11/2527 ,  G01N21/956 ,  G01N2021/95646 ,  G06T7/001 ,  G06T7/521 ,  G06T7/60 ,  G06T2200/04 ,  G06T2207/10152 ,  G06T2207/30141 ,  G06T2207/30148 ,  G06T2207/30152 ,  H05K13/08

Abstract: A three-dimensional measurement device includes a light source and grid that irradiate a measurement object; a luminance controller that changes luminance levels of the light; a phase controller that changes phase levels of the light pattern; a camera that takes an image of the measurement object; and a processor that three-dimensionally measures a first measurement object area based on different image data taken by radiating a first light pattern in different phases; determines a relationship between a gain and offset determined according to an imaging condition based on the different image data; and three-dimensionally measures a second measurement object area based on two different image data taken by radiating a second light pattern in two different phases by using a gain and offset regarding each pixel determined according to a luminance value of each pixel in the two different image data and the determined relationship.