System and device for determining a color value of a target object, and methods thereof

A non-transitory computer-readable storage medium encoded with instructions which, when executed on a processor, perform a method of:

• capturing, via a mobile device, a first image comprising both a color calibration object and a color reference object, wherein the color calibration object comprises a plurality of calibration colors each having a known calibration color value and wherein the color reference object has a known color value;
• determining, based on the first image, computed calibration color values for each of the plurality of calibration colors of the color calibration object and a first computed reference color value for the color reference object;
• determining a color calibration coefficient based on a known color value of the known calibration color values and a corresponding computed calibration color value of the computed calibration color values;
• determining a corrected reference color value based on the color calibration coefficient and the first computed reference color value;
• capturing, via the mobile device, a second image comprising a target object;
• determining a second computed reference color value of the color reference object and a computed object color value of the target object;
• determining a corrected object color value based on the corrected reference color value, the second computed reference color value, and the computed object color value;
• and
• causing the corrected object color value to be displayed via a display;
• and
• wherein the computed object color value of the target object relates to a whiteness value of a tooth.