Originally Posted by dpjb
I don't doubt that a 500 point calibration is more accurate, but while it's measurably better, is it actually noticable? I have seen it stated multiple times that a dE of less than 3 is undetectable to the human eye.
And while I admit I'd probable do it if I had all the equipment, as a diy-er, I can't afford all that stuff.
An interesting experiment for those with the time and equipment. Do a meticulous calibration using only the consumer controls and no external lut box. Then test the 500 points or however many you want and see how many of them are more than +3 dE.
I don't think either of the reasons you suspect calibrators don't give a more comprehensive reports are fair to the GOOD calibrators out there who use the usual software packages.
I guess I didn't make it clear that what I show in that download/link was just a measurement report that I used 500 color points for. The actual Calibration was made up of 9405 color points that where measured to create the profile of my VT60.
There is to much trust placed in dE's. Look at the last link in my sig, that is a normal 10 point grayscale and 6 point CMS (Gamut) calibration I made. As good as that report looks, one would think that there is no way of improving on a calibration for that display. At-least that is what I thought, so when I learned about this new cutting edge type of calibration I decided to try it out and see what it was all about. I made a very small LUT of about 125 points using Calman and my Lumagen Mini as the processor. After viewing some source video I was hooked, that was about one year ago. Over the last year I kept refining my shills for 3DLUT calibration, to the point that I am at now.
And yes there is no question that the type of 3DLUT calibration I can do now will be visually better than any normal calibration for my VT60.
Fair enough, here is a link to a report on the Sony 950 ($8000 TV state of the art 4K) done by a very good pro calibrator. This chart is made up of DeltaE (dE that is what you are referencing ) 2000
Note the red 75/100 error of well over dE4. However the average dE is 1.05. Also were the color points (round) are to the reference square points.
Now compare my 3DLUT calibration chart using 500 points to the above linked chart using 12 points. As you can see just using 12 points to check the dE there already is Red showing a dE of well over 4, I wounder what that calibration would look like if you used a 500 or larger color point check to check the dE's.
Below is a normal type of report I ran using just 18 points on the same kind of chart.
Also understand there are many more factors that can hurt or help make a good calibrationt. In the case of the above linked chart he uses a Jeti 1211 to profile his D3, the Jeti if used correctly is one of the most accurate spectro meters there are.