More concretely for grey rendering…
Unless you are an expert in monitors (and even then) it is difficult to imagine what these differences can represent. What is the most bothersome, however, is when we can immediately see color dominances on the screen. This can affect all colors but is particularly noticeable in grays where the eye can quickly see when blues or reds are overrepresented.
Here are the screen’s grays and reproduced as measured by our sensor. For comparison on the bottom line are the ideal grays.
Whether the screen you are currently using is calibrated or not, you should be able to see the differences between the two lines.
PVA 6 ms : Dell 2407WFP-HCAs we can see, gray rendering is very good and well balanced on the Dell 2407WFP-HC. This compensates for the raw average DeltaE result, which was slightly disappointing. So in the end, we found this very good (see below for more details).
PVA 6 ms : Dell 2407WFP rev.4
TN 3 ms : Iiyama Prolite B2403WS
TN 5 ms : Samsung SyncMaster 245B
PVA 6 ms : Samsung SyncMaster 245T
MVA 8 ms : ViewSonic VX2435wmYou may recall that the DeltaE is in fact the DeltaC but weighted with a factor that is supposed to represent human eye sensitivity. More specifically, the colorimeter measures the gross difference between the desired color and the one actually displayed by the screen. It then applies a coefficient in function to the fact that our eyes are more sensitive to differences in grays than, for example, in dark reds.
This method is more precise and more representative of reality, however, it’s still not ideal. From our experience :
In grays : DeltaE < 2 = is very good. dE < 3 : correct. dE > 3 : bothersome and most people will see color dominances.
In red, green, blue, cyan, magenta, and yellow the eye seems much less sensitive to variations and even with a dE of 6, we sometimes can’t see the difference.
In lighter and pastel colors, the eye is more sensitive than with darker hues. When dE > 3 we can see differences that can be bothersome.
If we take the 2407WFP-HC’s graph from the previous page:
Grays are barely above dE = 2, extreme colors are sometimes above 6 but most are around 4, and lighter colors are at 3.
In our opinion, even those who are particularly concerned with color fidelity ought to be satisfied with this screen.
