Title:
カラーフィルター方式の色彩輝度計を校正する方法およびカラーフィルター方式の色彩輝度計
Document Type and Number:
Japanese Patent JP6787411
Kind Code:
B2
Abstract:
This color filter-type chromameter prevents error from occurring in a measured value after all corrected. Three spectroscopic sensors provided in the color filter-type chromameter have spectroscopic responsivenesses different from each other and respectively output three signals in response to colors to be measured. Performed is the transformation from three pre-correction measurement values respectively indicating the sizes of three signals into three post-correction measurement values. A three-dimensional color space before correction is nonlinearly transformed into a three-dimensional space after correction so that the transformation is performed from the three pre-correction measurement values in the three-dimensional color space before correction into the three post-correction measurement values in the three-dimensional space after correction. The transformation is determined so that the transformation is performed from measurement values of colors before correction, which are specific values of the pre-correction measurement values, into reference values of respective colors when each of colors R, G, B, and W is the color to be measured. Four or more spectroscopic sensors can also be substituted for the three spectroscopic sensors.
Inventors:
Ryota Miya
Okada
Okada
Application Number:
JP2018565524A
Publication Date:
November 18, 2020
Filing Date:
January 29, 2018
Export Citation:
Assignee:
Konica Minolta Co., Ltd.
International Classes:
G01J3/51; G01J1/42; G01J3/02
Domestic Patent References:
| JP2016105079A | ||||
| JP2015536459A | ||||
| JP2015178995A | ||||
| JP11514174A | ||||
| JP2009141684A |
Foreign References:
| US20130021528 | ||||
| US20030169347 |
Other References:
GARDNER, J. L. et al.,Tristimulus Colorimeter Calibration Matrix Uncertainties,COLOR research and application,2013年 8月,Vol. 38, No. 4,pp. 251-258
Attorney, Agent or Firm:
Gwangyang International Patent Office