Originally Posted by KTM250
For the DIY’ers that used the AVSHD disk to calibrate your D series plasma, I was wondering what the consensus is on which patterns you used to give the best results. I know they say that 10-12% sized patterns are what you want for plasmas, but the large APL’s are too small and the window patterns are too big. So I was curious which ones you used.
Funny you should ask that as I've been working on comparing how various patterns measure for gray scale, color, and gamma. This isn't a recommendation but some data to help compare the various options.
Here are my first results:
This is a table of comparisons using measured deltaE between a baseline calibration and various other test pattern sources. The baseline calibration was done using patterns embedded in a high resolution photograph with average RGB level of ~37%.
CIELUV dE>3 is highlighted yellow and >6 is highlighted red. Unusable readings are grayed out (i1 pro color for 17% stimulus and 10% gray level)
Things to note:
-Gray scale calibration is not as sensitive to pattern configuration as color calibration.
-AVSHD APL small patterns are an outlier and yield the largest errors relative to the other patterns.
-Baseline was very repeatable other than a 3 dE drift in red.
-Gamma was stable for all patterns except my high (55% avg. video level) pattern set.
-Comparison between my window patterns and AVSHD window patterns is in excellent agreement.
-Green had the largest variability and if you look at the details of the measurement the xy of green is what changes not luma error. So the green primary moves with APL.
I'm still digesting this data so please chime in with comments and take a look at the test patterns ( BD
iso). The disks are rough as far as navigation goes.