Originally Posted by PlasmaPZ80U
Originally Posted by ConnecTEDDD
This 'dE below 3 errors are not visible by humans' is a myth, it came out a lot of years before when the displays had poor controls or their controls were broken to correct down to a low dE average a display.
The Correct sentence for me is that: dE below 3 is more difficult to be recognised by average people that are not familiar with color, whose who can't identify from 2 images which has more natural shades/colors, or have no experience of what a reference image it looks like...
Anyone who has Lumagen and CalMAN and some time can check this to his own system doing a single test:
With the same Pre-Calibration Settings:
Perform an AutoCAL using one Lumagen Memory Slot with Cube dE Target of 0.5 and after it's finished, Run a Grayscale + Saturation + Color Checker Run to see your Average dE numbers....
After that Pefrorm a new AutoCAL to another Memory Slot with Cube dE Target of 3 and then, remeasure again Grayscale + Saturation + Color Checker Run to see your Average dE numbers....
Later, Load some familiar content and swap throught these memories... Do you see a difference? Yes... Pause the movie and swap, the difference will be more noticable. It's not day/night difference but is visible...
If you calibrate your display and you use our popular meters like iD3 + i1PRO, and then take your Grayscale+Saturations readings that got you average dE 0.5 for example, this means only that you are good versus your current meters.
So you have to add +1 / +2 dE or more because this is the average difference or your i1PRO compared to a better spectro like JETI/PhotoResearch.dE of 1.0 is the smallest colour difference the human eye can see.
So, theoretically any dE less than 1.0 is imperceptible, while any dE greater than 1.0 is noticeable. However, some colour differences greater than 1 can be imperceptible, while some colour differences below 1.0 can be very visible, depending on the colour being measured.
Also same dE color difference between two colors, for example comparing 2 yellows and two greens may not look like the same difference to our eye.
My following report came at 2010 when I was using CalMAN 4 with my VideoEQ Pro for manual calibration, these numbers are beyong Beyond Human Perception. looooool
Can you easily spot these errors using the new color comparator feature? I can barely tell and this is with static swatches, not moving video like with a BD movie.
From The CalMAN Screen Capture you have posted, the PC Monitors are not the ideal screens to make color comparisons of the different spot of two color because of they angle color shifting problems, but i'm moving this Color Comparison to the Next Level that will make all see the difference clearer to all
What I Did?
I made some AnimaTED Gifs with Color RGB Triplets taken from these Data's that CalMAN has at these small Color Comparitor Boxes. Actual & Target Boxes.
I made 2 different 300px x 300px Full Color Images for each Color, One Frame with RGB Value from Your Actual Measured Color and another Frame with RGB Triplet Information from the Target Color,
All these Data's are coming from CalMAN Image Comparitor Boxes.
You can verify them if you like, I did that already with screen capturing the AnimaTED GIF Frame Files to see if the values are maching with these at your picture.
So we have:White Color Difference between 2 Frames of 0.3 dE2000Red Color Difference between 2 Frames of 1.3 dE2000Green Color Difference between 2 Frames of 2.1 dE2000Blue Color Difference between 2 Frames of 3.1 dE2000Cyan Color Difference between 2 Frames of 0.9 dE2000Magenta Color Difference between 2 Frames of 1.1 dE2000Yellow Color Difference between 2 Frames of 0.7 dE2000
Now tell me that you don't see the Red 1.1dE or the Cyan 0.9dE.....
Please users that found my original post very extreme to comment about the difference you see of Green 2.1 dE or Red 1.4dE also, who are still believing what 3.0 dE is the limit of Human Perception....
Case Closed.... 1.0 - 3.0 dE Difference is visible but it has to do with color you are comparing, some low dE differencies can be more or less noticed.
Also when you are watching a movie with a static camera where 2 actors are talking....this is not a moving resolution image...
Moving resolution means when a car is passing by , or when the camera or objects are moving fast..
Imagine that LED/LCD have only motion resolution of 300-400 lines...
So we can't talk of what is happening with motion resolution color difference since the tests of color difference and the dE formulas are coming from static color comparisons.Edited by ConnecTEDDD - 8/29/13 at 2:09am