US 11,985,299 B2
Calibration device, calibration method, calibration program, spectroscopic camera, and information processing device
Masashi Kanai, Azumino (JP)
Assigned to SEIKO EPSON CORPORATION, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Jun. 23, 2021, as Appl. No. 17/355,340.
Claims priority of application No. 2020-108967 (JP), filed on Jun. 24, 2020.
Prior Publication US 2021/0409679 A1, Dec. 30, 2021
Int. Cl. H04N 17/00 (2006.01); G01J 3/02 (2006.01); G01J 3/28 (2006.01); G01J 3/46 (2006.01)
CPC H04N 17/002 (2013.01) [G01J 3/0297 (2013.01); G01J 3/462 (2013.01); G01J 2003/2866 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A calibration device comprising one or more processors configured to:
acquire a measured value obtained when a spectroscopic light source configured to output uniform light with a predetermined spectroscopic wavelength and configured to change the spectroscopic wavelength outputs the uniform light while changing the spectroscopic wavelength of the uniform light and a spectroscopic measurement unit to be calibrated spectroscopically measures the outputted uniform light;
acquire a target value for each of the spectroscopic wavelengths obtained when the spectroscopic measurement unit measures the uniform light;
calculate a transformation matrix for transforming the measured value, based on the measured value and the target value; and
correct a spectroscopic image by the spectroscopic light source based on the transformation matrix, wherein:
the spectroscopic measurement unit is a spectroscopic camera picking up a spectroscopic image corresponding to a plurality of wavelengths, and
the one or more processors are further configured to acquire a gradation value of a predetermined pixel in the spectroscopic image, as the measured value.