This is a simple program that takes a CIEx, CIEy color point coordinate and desired SDCM and outputs a table of CIEx, CIEy coordinates for the MacAdam ellipse centered on that point which can be pasted into Excel.
The method follows CIE TN 001:2014 "Chromaticity Difference Specification for Light Sources". The program takes the inputs (CIEx, CIEy, nSDCM) and converts to u',v'. It draws a circle in u'v' space and then converts back to CIE 1931 xy space to produce a set of ellipse points.
- Clone the notebook into your notebook. Datalore is free but any Python platform can be used.
- Change the inputs to what you want.
- Run the program
- Copy the results table and paste into Excel
- Plot in Excel
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