Color measurement device, data processing apparatus, measurement correction method, and program

A data processing apparatus comprising:

• a reception section that receives, from a color measurement device including an illumination section that illuminates a measurement object, and a photoelectric conversion section that is two-dimensional, and disperses, by wavelength, light from a plurality of positions on a surface of the measurement object illuminated by the illumination section and converts the light into an electric signal, a light reception result by the photoelectric conversion section for a plurality of samples whose measurement surface lightness differs from each other, each of which has uniform lightness among different portions across a measurement surface;
• a calculation section that calculates recursive illumination correction coefficients for correcting an error for a pixel caused by re-illumination in the color measurement device based on the light reception result received by the reception section;
• and
• a correction section that corrects a measurement value of the measurement object using the recursive illumination correction coefficients calculated by the calculation section.

A measurement correction method comprising:

• illuminating, by an illumination section, a plurality of samples whose measurement surface lightness differs from each other, each of which has uniform lightness among different portions across a measurement surface;
• dispersing, by wavelength, light from a plurality of positions on a surface of each sample illuminated by the illumination section, receiving the light, and converting the light into an electric signal by a photoelectric conversion section that is two-dimensional;
• calculating recursive illumination correction coefficients for correcting an error for a pixel caused by re-illumination in the color measurement device based on a light reception result by the photoelectric conversion section for the samples;
• and
• correcting a measurement value of the measurement object using the recursive illumination correction coefficients that have been calculated.