CurtPalme.com Home Theater Forum

Mark_A_W · Last edited by Mark_A_W on Mon Mar 31, 2008 3:58 am; edited 2 times in total

Hi Guys

With the help of Benny (Russ) and his Colorfacts system we have generated HCFR cal files for the:

- NEC XG LC CRT projector, and this should be good for the Sony G70 too, as it has the same tubes, C-elements and lenses.

- Sony 24" Trinitron GW900 CRT monitor (actually a HP clone).

We were stoked to see the HFCR system measures basically exactly the same as Colorfacts, once you have generated a Cal file.

But even with the Simple Calibration file you can generate with no reference, it's still pretty close, and perfectly usable.

Am I supposed to send them in to HCFR?

Anyway they are attached.

Hope someone uses them!

Mark

WTS · Joined: 08 Mar 2006 Posts: 1276 Location: Calgary

HI,

What probe did you use?

ecrabb · Posted: Sat Mar 08, 2008 4:34 pm Post subject:

Yeah, same question here. I'm really interested in trying it out after I get the G70 on the ceiling, but I haven't even bought a sensor yet... which one did you use/which one would you recommend?

I'm also curious what this file is and how it was generated?

Thanks!

SC

WTS · Joined: 08 Mar 2006 Posts: 1276 Location: Calgary

Hi,

I'm using the HCFR probe and I was using the NEC6PG file which was with the original HCFR software and I'm quite happy with the results. BUt I'll give this new file a try and see how it turns out. I have no idea what probe was used with the 6PG file.

AFryia · Posted: Sat Mar 08, 2008 6:19 pm Post subject:

Thanks Mark and Russ.

My search for a HFCR G70 cal file is over. Smile

benareeno · Joined: 22 Mar 2006 Posts: 1614 Location: ottawa, canada

what does a cal file offer you??

Your projector is not the same as his to begin with, so how can a file help you??

Just buy a colorimeter for 100 bucks and do your own grey scale, no?

Mark_A_W · Posted: Sat Mar 08, 2008 9:41 pm Post subject:

To make the Cal file you need to measure the primaries of each display, and enter the measured primaries into the HCFR software - for each display TYPE.

The HCFR system can measure greyscale, but as far as I understand it can't do primaries *accurately*, hence the need for the Cal file for each TYPE of display. (That said it's pretty good without one.)

The reference Colourimeter was Colorfacts with a Gretag Macbeth Eye One Beamer.

And yes, the cal file generated is good for all XG LCs, G70's (and the other file for the Sony 16:10 24" CRT monitor family). It is a raw reading of the phosphurs (+ lens filtering) and would not vary much at all.

For a PG or XG air coupled, the 6PG Cal file that is included would theoretically be better, due to different lens filtering, but I don't know how it was generated.

Give it a go, but always compare results to a self generated Simple Calibration file. They should be close, but not identical.

And yes Ben, you build the ~$100 DIY probe and just go....but you need a Cal file for each display type, as the raw primaries are different for each.

Mark_A_W · Posted: Sat Mar 08, 2008 9:57 pm Post subject:

The Raw XG xyY numbers are:

Red

x: 0.6270
y: 0.3400
Y: 2.6000

Green

x: 0.3005
y: 0.6000
Y: 6.2100

Blue

x: 0.3120
y: 0.3320
Y: 5.940

AFryia · Posted: Sat Mar 08, 2008 10:06 pm Post subject:

Mark_A_W · Posted: Sat Mar 08, 2008 10:12 pm Post subject:

kschmit2 · Posted: Sat Mar 08, 2008 11:25 pm Post subject:

I just got a Spyder3 Elite as a loaner.

Maybe I can see how well it works. I don't thinks it's supported in the HCFR tool yet, though, so I would have to use the included tools.

benareeno · Joined: 22 Mar 2006 Posts: 1614 Location: ottawa, canada

you may not like the spyder results because you need to defocus blue even more than you have...

**kal** · Posted: Sun Mar 30, 2008 7:08 pm Post subject:

David_Web · Joined: 02 May 2007 Posts: 418 Location: Sweden

You cannot move primaries in any way. Unless you can change the wavelength of the light they emit. (or by adding a filter if the spectrum peak is wide)
You could make a correlated move inward in the triangle by mixing two primaries with each other to get a more correct response.

The calibration file is to give the wavelength of the source to it can properly understand how bright each primary is in relation to it's own response.

This is just an educated guess tough.

btw can any one post a few more raw data from different filtered/unfiltered tubes?

garyfritz · Joined: 08 Apr 2006 Posts: 12088 Location: Fort Collins, CO

**kal** · Posted: Sun Mar 30, 2008 8:09 pm Post subject:

garyfritz · Joined: 08 Apr 2006 Posts: 12088 Location: Fort Collins, CO

If you've got colored C-elements, you can be sure it changes the primaries.

Kal, I haven't had a chance to look at the new release of HCFR at all, so I haven't figured out any of this cal file stuff. You'd probably have a lot better luck asking in the calibration forum on AVS. That's where all the HCFR experts hang out.

David_Web · Joined: 02 May 2007 Posts: 418 Location: Sweden

" If you've got colored C-elements, you can be sure it changes the primaries. "

That's what I said.

Take the green tube. It's spectral response is a big 'lump' ranging from deep green to yellow. It's correlated primary color is light green.
If you add a filter cutting away the yellow bit your correlated primary color would now be a darker and deeper green.

Same thing with red.

And that is also why you filter the red and green tube.

**kal** · Posted: Sun Mar 30, 2008 8:42 pm Post subject:

Yup. For sure. It just makes it more complicated to measure primaries as you can't rely on what the phosphor does, and I have no idea if the G70/XGLC use the same P16LNP tubes and tinted c-elements as my Zenith 1200.

Kal

garyfritz · Joined: 08 Apr 2006 Posts: 12088 Location: Fort Collins, CO

Hey Kal, there's this really great website where you can get info on what tubes the G70/XGLC use. Maybe you should talk to the webmaster. Laughing

The G70 uses P16LJE08, XGLC uses P16LJE07. Who knows how the C-elements compare.