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Topic: Barco DP2K-12C : Color Measurment procedure
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Steve Guttag
We forgot the crackers Gromit!!!
Posts: 12814
From: Annapolis, MD
Registered: Dec 1999
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posted 02-10-2012 06:17 PM
When calibrating the DP2K-12C (or any Barco projector), if you use the Communicator Software (which you should...it is free!), it will ensure you have it right.
For the Color Measurement Procedure, it will load uncorrected colors and apply zero correction to it. After you are done, it will give you the option of naming/saving your MCGD (what you measured) to be used with any suitable TCGD (what you want).
To prove to yourself that you did a good job...after saving/loading your MCGD, verify with the Verify Colors TCGD and measure color by color (it will tell you what they should be) and it should be to within DCI (or REC 709 or whatever color space you want) given the tolerance of the specification.
The key is you MUST measure uncorrected colors
If you are doing this through the TI ICP program one can also select the uncorrected colors.
When you are done, for DCP/JPEG programs, you want the DCI_XYZ_314_351.TCGD as your target colors.
That said, Barco uses .PCF files (Projector Configuration File) that takes care of getting the TCGD selected for you. Again, DCI_XYZ_314_351 is the PCF you are looking for on 2D JPEG sources.
For REC709 (HDTV) they have a PCF and for 4:2:2 DCPs they have other PCF files (Depending on your player)
The PCF is a collection of parameters, including gamma, TCGD and such to ensure all of the bits and pieces are there for a particular format.
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Steve Guttag
We forgot the crackers Gromit!!!
Posts: 12814
From: Annapolis, MD
Registered: Dec 1999
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posted 02-11-2012 11:47 AM
DCI_Xenon is a "perfect" version of the typical xenon color space. It has the same values as the "Nominal" MCGD...thus when those two are paired, the projector will not color correct at all.
The P7 color files, if I recall correctly, relate to the 4:2:2 color spaces and MPEG and date back all of the way to series 0 projectors (Barco DP40, 50, Christie DCP-I and H).
If you want to see what their coordinates are, connect to the projector via the TI ICP program and then load each one and see how the various boxes fill themselves.
If you have the Barco PostProduction version of Communicator, you too can see what is going on and create PCF files that have the parameters you want.
With Christie, you can also go to the TCGD screen and load the various TCGD systems and see what gets loaded.
I don't believe NEC gives one a means to see the TCGD within the DCC program...they too load a PCF to take care of it. But, with the TI ICP program one can see ANY of the DLP projector's TCGD files (and create ones of your own).
-Steve
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Dave Macaulay
Film God
Posts: 2321
From: Toronto, Canada
Registered: Apr 2001
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posted 02-11-2012 12:34 PM
This is what I do,:
turn on the lamp and let it heat up for 5 or 10 minutes.
Select a test pattern. This means that in the next step the active MCGD will be <TEST PATTERN> - I don't know if a different one means different results but that's my procedure. I aim the meter at the screen centre, using the projector crosshair pattern. I like to adjust the lamp power for around 16 ft-L with the white pattern, if the light is really dim my color meter takes longer to stabilize.
log in as service tech
go to "installation", "color calibration", "measure native colors"
read color x/y values for the 3 colors plus white and enter the color meter readings in the boxes.
"save to file" to a name that makes sense, ie "onsite_2D" for 2D.
then "apply and exit"
go to the next choice, "select target colors" and pick "color verification". This makes you check a couple of "yes" boxes before you get back to the main menu.
next "verify corrected colors". If you're anal you can check all 6 colors and white, but if white comes in close to 314x/351y then the other colors are going to be pretty good too.
The color measured on a white test pattern is never 314/351 on a Barco in my experience, you only get it through this color calibration page by selecting "color verification" and then verifying the white in the next stage.
Communicator Post needs a key from Barco to run. The latest version gives you 30 days play time before it shuts off if you don't get a key. It doesn't have any features I need enough to bother asking for a key so far.
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