Calibration method for image processing device, calibration device, image processing device, and display module

A calibration device for calibrating an image processing device including a three-dimensional lookup table for performing a first processing on first image data and a one-dimensional lookup table provided on an output side of the three-dimensional lookup table for performing a second processing to image data after the first processing, the calibration device comprising:

• a colorimetric unit for performing colorimetric measurement of an image corresponding to image data that is output from the image processing device;
• a one-dimensional lookup table generation unit for generating first calibration information for each color component to be set at the one-dimensional lookup table to have a target color temperature based on a result of colorimetric measurement of the colorimetric unit;
• and
• a three-dimensional lookup table generation unit for generating second calibration information to be set at the three-dimensional lookup table such that the first image data is mapped to a target color space based on a result of colorimetric measurement of the colorimetry unit,
• after setting the first calibration information at the one-dimensional lookup table, the second calibration information being set at the three-dimensional lookup table, and thereafter
• the first calibration information being corrected based on an error from a target characteristic obtained using the image data that has been processed by the second processing.

An image processing device comprising:

• a three-dimensional lookup table for performing a first processing on first image data;
• and
• a one-dimensional lookup table provided on an output side of the three-dimensional lookup table for performing a second processing to image data after having been processed by the first processing,
• the one-dimensional lookup table including first calibration information for each color component that is adjusted to have a target color temperature based on a result of colorimetric measurement of each pure color to be displayed using the first image data in a state in which the first processing is turned off, and the second processing is turned off, and
• the three-dimensional lookup table including second calibration information adjusted so as to be mapped to a target color space based on a result of colorimetric measurement of each pure color to be displayed using the first image data in a state in which the first processing is turned off, and the second processing is turned on,
• the first calibration information being information corrected based on a result of colorimetric measurement of grayscale to be displayed using the first image data in a state in which the first processing is turned on, and the second processing is turned on.