Originally Posted by sotti
Just forget the dE numbers, try to get the RGB percentages with in a tick one way or the other from the target.
The dE numbers don't give you any actionable data, IMHO the only value they have is in reporting and testing conformance.
The exception is the dE94 LCH break out is extremely useful because it does actually give you information in how to correct the error.
that last bit is great for gamut, but I was referring to grayscale (color) error specifically
also, with dEUV the better the RGB percentages the lower the dE and all grayscale points are treated equally since the L portion of the formula is removed... in other words, what you suggest is not that different from what I do, I just look at dEUV in addition to RGB %
gamma is checked separately so if my target is 2.2, anything from 2.15 to 2.25 is acceptable