Customise standard levels not working – cannot comment on earlier post

Hi Cedric, I got your response on the original question I posted (thank you!) but I kept getting locked out of commenting on it so I had to create a new question. The original question is attached below as well:

I don’t get any new option to put in any values when I tick the box. Do you mean I should put the values in the “Standard reflectance(s)” box? As an example, I have the new RGB values for my standards as 12.08, 12.56, 12.98. Since they are not all the same in the three channels, I cannot put 12 in the “Standard reflectance” box I suppose. But after ticking the box, I do not see any new options pop up.

Thank you

Udita

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Response: Hi Udita,

Have you tried entering the reflectance value of your grey standard when ticking the box? That does it for me.

Cheers,

Cedric

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Question: I used my custom grey paint standards and photographed them along with the X-Rite colorchecker. Using the 19.38% reflectance grey in the X-Rite, I got RGB values for my grey standards. The values in each of the three channels differ slightly (in decimals), but so do the values for other greys in the X-Rite. I could just go with a rounded up value but I have used different grey standards across some of my images and want to make sure that the rounding up does not affect the analysis. So I wanted to use the “Customise standard levels” option in the Multispectral Image Generation tool. However, I don’t see any options to specify these customised standard levels when I click the box next to it. Am I missing something?

Thank you!