Hello,

(My English is not so good, European...)

I am Rookie calibrator starting with spyder2, colorfacts pro etc.

All the basis visual calibration like colour saturation, tint, brightness, contrast etc and even the primaries and secundair colour calibration will go perfect.

But when I started the main calibration (greyscale), the problem started when I measure 80 IRE value I need to reduce the Red , Green and Bleu levels to minimum and even the I can not get the measure bars under the 100%, (same idea with 20 IRE measuring and the cut values) or 70 ire etc...

I measure on a new pdp427, pioneer, I use the original and the right calibration pictures. I use the c3 remote control.
With 80 IRE measuring you will have RED Gain -30, Green gain -30, Bleu gain -30. Result and the bars shows then:
RED 98 %, GREEN 132 %, Bleu 110%

The picture is with the entire gain colours en Cut colour in default mode ""good"" (before calibration)
I have installed the latest Colorfacts en c3remote.exe from the official site.

I hope somebody can help me further,

Greetings Elco

hi
On the RGB tool window, move the lock control (drag and drop) on whatever color (RGB) that you want to reference off of. This will put that color at 100%, and will then put the other 2 primaries relative to the locked primary.
Happy tweeking!
(I wish all CF support questions were that easy!!)

Gregg

Thanks Gregg for your respond,

hmmm I used that with a CRT monitor where you can change only for example red and bleu and not green. Then you can lock green and change the other 2 colours...

But in this case it should not be necessary too lock some colour on the RGB bar to get little bit under or all the colours close as 100%,
Because I have all the option's to change every R, G, B cut off and gain colour.
(Pioneer PDP427 )

Elco

you always lock a color. It doesnt matter if you have full RGB control or not, you need to indicate to the computer what reference color that you want to measure against. I strongly recommend that you lock the green (when able to, meaning when you the ability to control red and blue). Green is the majority of the image and changing green will cause changes in luminance output.

regards

Gregg

I agree with Gregg - when you set your white and black levels using the global contrast and brightness control, you have effectively set the green, so you can lock it and adjust the other two colors accordingly.

With projectors, I generally find the weakest color (Red with UHP lamps) and set it at point it runs out at 100 IRE, then bring the other two colors down to match. Can you do that with a plasma?

Gary

hi Gary
the easiest way to set contrast is to first set just below the point of clipping. Then balanace on 70 IRE to get the white balance point set. After doing so, put on a 100 IRE window and start taking gray scale measurements. Turn the contrast down while measuring the 100 IRE window until you get to the white balanced.

hello,

perfect! thanks for your explanation!, i understand!

new i can go further :) :) :)

About contrast:
""Then balance on 70 IRE to get the white balance point set."
the white balance point set , how check white balance point ?

:D i am really a rookie ;)

greetings elco

Hi Gregg,

I've not had the opportunity to calibrate a plasma yet, so thanks for the tip.

Gary

Gary, the technique works for all digital technologies. Im naming it the LionAV technique :-) (seriously...many people have not thought about setting contrast this way).

Elco, it is sounding like you really need to take training which is strongly encouraged for CF users. Please note that I am not trying to talk down to you. When you go through training you will be introduced to all these terms and start to talk the "language" of others within the industry. When we all talk the same language, it is much easier to discuss issues with each other.

the White balance point is what ever you are trying to calibrate to. For most home theater applications, that point is D65 or x313 y329. If you have set CF to 6500 it will note that in the lower right hand corner where it will say " White Target Illuminant D65". If you click on this you can select a variety of different targets including the ability to enter your target points.

Regards

Gregg

Gary, the technique works for all digital technologies. Im naming it the LionAV technique :-) (seriously...many people have not thought about setting contrast this way).

Hey now ... that's what I had to resort to on my "ancient" 3-CRT clunker ... although I used 85IRE (which is the point that the blue CRT starts running away with the show.) :)

nope, crt calibration is a totally different technique.

Hi Gregg,

I have seen that method used before, but on an HS60. Guess there's more than one way to skin a cat!

Gary

nope, crt calibration is a totally different technique.

Sure it is ... as long as one of the CRT's (hint blue) doesn't have a funky gamma curve :)

Imagine on the ubiquitous RGB % vs. % stimulus chart the following: Red and Green are (mostly) flat lines hovering about 100% (or 0% delta), while the blue curve looks more like a U shape and no amount of "walking the cut/gains" back and forth will get rid of the U shape ... it's maddening enough to drive you to drink. ;)

Anyway I was eventually able to find a compromise using the exact technique you described above ... unfortunately (on my RPTV) it does result in a white level that's a bit too dim for "normal" viewing, thus I've just learned to accept that little skew to blue at 90-100IRE.