Originally Posted by mechman25
I had a chance to sit down last night with the meter and do a USER calibration.
I tried to stay with the direction you were going johnfull with auto lighting on and set to -11 to +16.
I also left gamma at o which gave an average gamma of 2.05
Color and tint were done with blue filter.
I have attached some pics of pre and post calibration.
I got the RGB colors even for the RGB balance but they were running a little high above the 0 line.
On the CMS side, green was so far out that I could not get rid of the error on green so I left the CMS values at 0 for all.
This is something that rlindo (I think)ran in to when trying to calibrate game mode.
So here are the numbers I came up with.
AV Mode User
Backlight Auto -11 to +16
Resolution Enhanced Mode 1
Motion enhancement 120hz High
Clear picture processing Off
CMS All 0
Color Temp Low
Active contrast Off
Gamma adj 0
Film mode Off
Digital noise reduction Off
I am going to try out these settings for a couple of days and see what they look like.
Is this what you were looking for johnfull?
Also for some of the other guys using a meter, is there a method to set color and tint using your meter instead of the blue filter?
I am tending to not believe the higher tint numbers I am getting using a blue filter.
Thanks again for doing a Standard setting with the meter, Mechman.
I found time (in the wee wee hours!) to do some comparisons and have one important question:
Do you account for the yellow pixel of the Quattron system in your calculations?
Being intermediary between red and green, the meter may pick it up as one or the other or both.
Depending on that, all the rest of the numbers would be off as well as calculations based on them.
I've read elsewhere that it is a problem for professional calibrators.
I tried the 2-Point temperature numbers and had my own 10-Point numbers to toggle back and
forth between. My screen, in monochrome, looks too blue, it is true! I could back off on the
blue somewhat to get closer to a neutral monochrome gradation, but turning on the color shows
my preferred white temperature against the colors of the rest of the screen.
Mechman's screen looks yellow/green in monochrome and with less contrast (Gamma).
When the color is switched on, this yellow/green cast throws the colors off and explains why he
needed to alter the global Tint value -- something I avoid like the plague for the sake of
color accuracy. I had found the same objectionable yellow/green cast on the Movie setting last
week and mentioned it. The yellow pixel has to be accounted for somehow to use a meter.
Has anyone googled 'Quattron calibration' to find out how to overcome this situation?
The blueness of my Standard screen was the reason I switched to the User mode very quickly.
I had arrived at the blueness by biasing the monochrome picture more and more to get the
fleshtones within the range of acceptability. The blue desaturates the yellow tendancy and
allows more overall Saturation without faces turning into lemons or tangerines.
In the User mode, there is a less aggressive Chroma algorithm at work and it took a lot less
bias to sweeten the fleshtones, resulting in a warmer white and a more colorful picture.
I still toggle back and forth between my User and my Standard setting and see advantages
for each on diffferent sources. Since USER allows each source to have a different input, the
STANDARD can be used for the web browser (for example) while USER is used for BluRay.
That's another drawback to the static calibration with a meter -- the interaction of the set's
internal logic with the input numbers is not seen in action. Each PICTURE QUALITY setting
takes your numbers and runs with them in a different direction. My very favorite one is the
THX MOVIE mode for color rendition. It reminds me of Kodachrome slides in the transparency
and smooth contour of color gradation. The unacceptable drawback is that the backlight stays
in a fixed setting -- either 'Dark Room' or 'Bright Room' -- a terrible waste of the sensor and
how it maintains brightness and contrast across conditions and content.
One clue about the yellow pixel comes from Sharp's description of the
advantages of Quattron, one of which is brighter white resulting from
2 pathways instead of one: RGB and BY. The blue/yellow white portion
seems to be unseen by the calibration equipment, but is instead seen as
an excess of blue alone and the resulting calculations are too yellow...