OK, I'll consider keeping them if someone can give me a short, simple (As possible) write up on what one would use these for. I'm the one who will get the questions. I don't believe they fit the spirit of the disc. What would be nice is a gamma test pattern, becasue that *is* something you can adjust, but I don't know how to make one. My instruments tell me the gamma when I run a grayscale.
Its not that I don't appreciate having the freq. patterns, I do, but if they don't do something specific, explainable, and useful (without a oscope)... they are on the chopping block...
FYI, Here's the description from the pattern author (drmpeg): They are "frequency burst patterns".
In order of presentation on beta 4.x:
alternating white/black pixels with the first
bar 4 black/ 4 white pixels, second bar 3 black/3 white,
third bar 2 black/ 2 white and the last bar 1 black/ 1 white.
In other words, they are 1.6875 MHz, 2.25 MHz, 3.375
and 6.75 MHz resolution "patches". I believe the 6.75 MHz
"patch" can be used for 1:1 pixel testing, but I'm not 100%
sine waves of frequency (in this arrangement)
0.5 MHz, 1.0 MHz, 1.5 MHz, 2.0 MHz
2.5 MHz, 2.75 MHz, 3.0 MHz, 3.25 MHz,
3.5 MHZ, 3.75 MHz, 4.0 MHz, 4.2 MHz
4.4 MHz, 5.0 MHz, 5.5 MHz, 6.0 MHz
The higher frequency sine waves have lot's of sampling
phase error, which is unavoidable. On Avia Pro, they
use frequencies they are integer divisors of 13.5 MHz
to avoid the problem. I think they are called "Nyquist"