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!

Customise standard levels not working
Cedric van den Berg Answered question May 21, 2024