Re: How to calculate the Colordifference Delta E with ImageJ ?

Posted by Peter van Loon on Nov 10, 2014; 7:58am
URL: http://imagej.273.s1.nabble.com/How-to-calculate-the-Colordifference-Delta-E-with-ImageJ-tp5009612p5010348.html

Hi Matzu, The lighting and CIE observer standard values are indeed important values. I always calibrate the RGB values of the patches to the given fixed Lab values of the patches. This calibration is influenced by lighting but also the white balance of the camera. But I don't think this is what you want because (in theory) after calibration(to a certain CIE observer value) the deltE between the patches will always be the same. So for me it is still unclear what you want to achieve with this. This make it more difficult to answer your question. Another aprouch can be to use the RGB values and calculate the Lab values later by e.g. OpenRGB (http://www.logicol.com) Regards, Peter