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Hi Jolyon,

I am constantly getting errors when running the colour and luminance JND calculations. As you suggested before, I am transforming cone catch to RNL chromaticity first and then running the JND. However, sometimes I get either “NaN” in the JND_diff column or nothing pops up in the Comparison Results window. I have tried to use the cone mapping model that I have created but also one that was already in the toolbox. I am not sure why this happens sometimes. Would you have any idea of what I might be doing wrong here?

Thank you!
Lais.

JND calculation – NaN
Answered question