US 11,941,852 B2
Three-dimensional measurement device, three-dimensional measurement method, and three-dimensional measurement program
Atsushi Hayashi, Kisarazu (JP); Nobuo Kochi, Kisarazu (JP); Takanari Tanabata, Kisarazu (JP); and Sachiko Isobe, Kisarazu (JP)
Assigned to Kazusa DNA Research Institute, Kisarazu (JP)
Appl. No. 17/608,957
Filed by Kazusa DNA Research Institute, Kisarazu (JP)
PCT Filed Feb. 25, 2020, PCT No. PCT/JP2020/007380
§ 371(c)(1), (2) Date Nov. 4, 2021,
PCT Pub. No. WO2020/240949, PCT Pub. Date Dec. 3, 2020.
Claims priority of application No. 2019-102437 (JP), filed on May 31, 2019.
Prior Publication US 2022/0215585 A1, Jul. 7, 2022
Int. Cl. G06T 7/80 (2017.01); G06T 7/00 (2017.01)
CPC G06T 7/85 (2017.01) [G06T 7/97 (2017.01); G06T 2207/10012 (2013.01); G06T 2207/30208 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A three-dimensional measurement device comprising:
a processor or circuitry configured to:
receive data of multiple photographic images, the photographic images being obtained by photographing a measurement target object and a random dot pattern from multiple surrounding viewpoints by use of a camera;
select three or more camera positions surrounding the measurement target object, from among multiple positions of the camera from which the multiple photographic images are taken;
select the photographic images as stereoscopic images from among the photographic images that are taken from the selected three or more camera positions; and
calculate the camera position from which the stereoscopic images are taken, by a method of intersection and resection using the stereoscopic images, wherein
the selection of the camera positions is performed multiple times in such a manner that at least one different camera position is selected each time,
the random dot pattern is formed on a surface of a longitudinal member that stands upward and is fixed on a table on which the measurement target object is placed, and
the longitudinal member has a height greater than a height of the measurement target object placed on the table.