Instrument monitoring and correction
AssigneeDatacolor Inc.
InventorsZhiling Xu, William Bishop
Life of this patent
Estimating the term…
Abstract
In the disclosure provided herein, the described apparatus, systems and methods are directed to compensation of errors caused by the difference between the specular port and the sphere in a sphere-based color-measurement instrument, and improvement of the performance of the instrument. In one or more implementations, described approaches eliminate the need for hardware replacement, and therefore reduce costs associated with the operation of color measurement instruments.
Claims15
A method of compensating for measurement error in a color measurement device, the method comprising:
- measuring a total measured reflectance value of a color sample using a sphere-based color measurement device;
- obtaining, using at least one processor, a wavelength dependent calibration factor;
- obtaining, using at least one processor, a reference measurement value;
- calculating, using at least one processor, at least a corrected measurement value for the color measurement based on at least the calibration factor, reference measurement value and the color measurement value;
- and
- outputting, using the at least one processor, the corrected measurement value to at one or a display device or data storage device.
A color measurement device, the color measurement device comprising:
- an integrating sphere having a specular port, at least one color measurement sensor and an illuminator;
- a processor configured by code executing therein to:
- cause the illuminator to illuminate the interior of the integrating sphere,
- receive at least one color measurement value generated by the at least one color measurement sensor when a sample is present in a sample port of the integrating sphere and the illuminator is configured to illuminate the integrating sphere;
- obtain a reference measurement value;
- obtain a wavelength dependent calibration factor;
- calculate at least a corrected measurement value for the color measurement based on at least the calibration factor, reference measurement value and the color measurement value;
- and
- output, using the at least one processor, the corrected measurement value to at least one display device or data storage device.
Dependencies are inferred from the claim text.