US 11,796,308 B2
Three-dimensional measuring apparatus, three-dimensional measuring method
Nobuaki Tabata, Iwata (JP)
Assigned to YAMAHA HATSUDOKI KABUSHIKI KAISHA, Iwata (JP)
Appl. No. 17/270,840
Filed by YAMAHA HATSUDOKI KABUSHIKI KAISHA, Iwata (JP)
PCT Filed Aug. 24, 2018, PCT No. PCT/JP2018/031331
§ 371(c)(1), (2) Date Feb. 23, 2021,
PCT Pub. No. WO2020/039575, PCT Pub. Date Feb. 27, 2020.
Prior Publication US 2021/0310791 A1, Oct. 7, 2021
Int. Cl. G01B 11/00 (2006.01); G01B 11/25 (2006.01)
CPC G01B 11/002 (2013.01) [G01B 11/25 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A three-dimensional measuring apparatus comprising:
a projector configured to irradiate a light of a predetermined wavelength to a target;
an imaging camera having a plurality of pixels to which a light reflected on the target is incident, each of the pixels outputting a pixel value corresponding to an intensity of the light incident; and
a controller configured to perform shape calculation of a three-dimensional shape of the target on a basis of the pixel value, wherein
the pixels include a plurality of high-sensitivity pixels and a plurality of low-sensitivity pixels having a spectral sensitivity characteristic having a lower ratio of output to input of the predetermined wavelength than a spectral sensitivity characteristic of the high-sensitivity pixels,
the high-sensitivity pixels and the low-sensitivity pixels are arranged alternately,
the pixels include the high-sensitivity pixels and the low-sensitivity pixels at the same ratio,
the predetermined wavelength is a wavelength of green,
the pixels are arranged in a Bayer arrangement in which red, green, and blue pixels are arranged in a predetermined pattern,
each of the high-sensitivity pixels is the green pixel in the Bayer arrangement,
the low-sensitivity pixels include an equal number of the blue pixels and the red pixels in the Bayer arrangement, and
the controller is configured to perform the shape calculation of a three-dimensional shape of the target on a basis of the pixel value of the high-sensitivity pixels having detected the light of the predetermined wavelength and the pixel value of the low-sensitivity pixels having detected the light of the predetermined wavelength.