High accuracy imaging colorimeter by special designed pattern closed-loop calibration assisted by spectrograph

A method for using a narrowband color measurement device to calibrate a wideband color measurement device, the method comprising:

• presenting predetermined test patterns;
• configuring the narrowband device and the wideband device to concurrently measure color data from the predetermined test patterns;
• capturing the color data from the wideband device and the narrowband device;
• determining a best fit correction matrix relating the captured color data;
• evaluating whether the best fit correction matrix is acceptable as a calibration parameter for color measurements from the wideband device;
• and
• returning to the step of presenting predetermined test patterns when the best fit correction matrix is not acceptable as the calibration parameter.

A system configured to use a narrowband color measurement device to calibrate an output of a wideband color measurement device, the system comprising:

• a splitter configured to split an image of a test pattern into a first image and a second image;
• a narrowband device configured to capture a first data from the first image;
• a first image pipeline configured to direct the first image to the narrowband device;
• a wideband device configured to capture a second data from the second image, wherein the captured first data and the captured second data are used to determine a correction matrix relating the captured first and second data;
• and
• a second image pipeline configured to direct the second image to the wideband device.