The Official ChromaPure thread - Page 89

Ah! Sorry. Was going by the updates/postings.

Kal

Makes a lot of sense to me.

We have been silently releasing small updates without changing the release version. It is still officially 2.2.13, but the latest version will show up in About CP as 2.2.14.24945.

Just use the download link in the News section to always get the latest version. When we officially provide an update, all of the small changes will be documented.

That's correct. That's why it is advisable to minimize as much as possible exposing the meter to changes in temperature. Using it in non-contact mode is one of the best ways to do this.

This can only be done by a forum moderator. I don't know who that is.

Title edited

Thanks, Mike. That was fast.

Yay !

measurement of one sensor in Cromapure and Calman must be the same or not ?

Using the same mode of operation and assuming no proprietary calibrations, yes, within reasonable tolerances.

What size are the window patterns on the DVG-5000?

O.K. did the search on this thread and found that the window patterns are 10.8% of the screen area.

Is there any way to adjust them within the menu to default to 10%?

I've got a panasonic 65VT50 and the chat is that it calibrates better with 10% windows give the aggressive brightness limiter.

....or is there even any difference to matter between 10.83 and 10%?
Edited by JimP - 8/19/12 at 9:47am

10.83%

That tiny difference wouldn't matter.

ChromaPure 2.3 Announced

We will be releasing a new version of ChromaPure in a few days when the production release of the Lumagen firmware that supports the new and revolutionary 125-color calibration capability is ready.

See our News page for release notes for 2.3.

We have also released a firmware update to the AccuPel DVG-5000.

For a write-up of the new Lumagen technology and what it means for consumer color correction, see our latest New Gear article.
Edited by TomHuffman - 9/6/12 at 12:26am

Tom,
This sounds awesome. Can't wait to give it a try - I've already paid for my upgrade!
Edited by Geof - 9/6/12 at 8:21am

I'm surprised no one has commented on this yet. Unless I misunderstand, the 125 color calibration capability sounds like a great solution for correcting the non-linear luminance and saturation responses that up until now could not be fully corrected with a typical CMS.
As mentioned in Tom's new gear article this could have significant impact on PQ.....

Welcome to the world of 3D LUTs. There have not been other comments because of non disclosure agreements and it'll probably stay that way until Lumagen releases the FW to the public.

That's exactly right. In the immortal words of Joe Biden, "This is a big f'ing deal."

BTW, I should have mentioned, anyone opting for this should be using a fast and accurate meter with good low-light sensitivity, such as the Display 3 PRO, Hubble, or K-10. If you try and do this with a Chroma 5, Display 2 or i1Pro you either won't get the desired results or you may get them after the 2 hours it takes for the process to complete. I would also recommend not using a reference spectroradiometer either. Each calibration may take 600-700 readings. That's the best way I know of to wear out a shutter.

I'm not sure I follow. Tom posted the Chromapure announcement today. Perhaps those who've used it are under an NDA but I think many of us are not.

Seems like a big f'ing deal to me too Tom. A significant step forward I think. I suppose results will vary depending on how good or bad tracking is on the display. I'm anticipating an improvement on my RS55 though as I know it doesn't track as well as what you've shown on your New Gear page.

BTW, can we now set a target gamma when auto-caling greyscale?

You got it right.

I'll certainly be interested in reading your comments along with others who have used it!

The rest of auto-cal is the same.

Actually, it is not advisable to set a higher standard gamma for auto-cal (and certainly not a lower). If you run a standard power law gamma much higher than 2.22, then you will get poor shadow detail. Running a higher gamma above 40% and a lower one below is fine, but that sort of fine tuning should be done independently of auto-cal. We may implement BT.1886 in the future builds, but my inclination is to leave auto-cal at 2.22, as that is a good compromise for most systems.

damn.... I was hoping not to have to buy a Radiance....Drat! but this is a big f...ing deal..

As a practical matter if a display can not be set perfect with these techologies at sufficient brightness due to design limitations in the display can indidividual ranges be optimized by prioirity, say intensity or saturation ranges? Or is luminance at max always forced down to achieve required saturation.Meaning that autocalibration requires achieving high accuracy saturation at max luminance and everything follows from there?

I guess what I am saying is that if a set won't hit the saturation targets at max brightness but will at any level of 95% stimulus or below can you chosse to be optimal at all points below 96 percent intensity and let the set clip above that to the extent that are inherent in its design. Essentially, this is the idea behind using 75 stimulus patterns. In that event you would be linear from 0 to 95 percent all levels of saturaion and the set would only be out at some saturaion levels and some colors above 95 percent saturaionin my hypothetical scenario.

I'm under a NDA with another software company. Lips zipped. Sorry.

I meant when your NDA is over, if the NDA is pertinent to Tom's announcement.

I have two gamma profiles stored in the Radiance - 2.22 and 2.3. I haven't used the 2.22 in quite awhile though.

Tom:

I do like to do a custom curve on most my claibrtions to come out of black quite fast like in bt1886 then proceed to a higher gamma nearer 2.3 or more as i get closer to 100percent stimulus. I presume you would recommend doing the auto cal then going in and tidying up the gamma with the 21point afterwards. There isn't going to be a way to do your custom gamma first then run the gamut part?

It will surely be interesting to see how the final results of CP and the other SW compare to one another.

Slightly off topic: If the results are both as good as proclaimed and they are well received and utilized and the LUTs are being written by the software, not the Radiance, it won't be long until more affordable LUT holding/processing boxes become available.

Along with the 125 point calibration this would be a great option IMHO. Similar to Gordon above, I like to use a fast out of black setting with a higher gamma above 30 IRE I would like to try the BT 1886 gamma as IIUIC it is a similar but formalised version of what I do.

Hi Tom.
I bought a i1DPro pro from RickyJ about 18 months ago (I think) along with cp 2.2. Would the meter still be accurate enough to use with cp 2.3 or do I need to send it back to Ricky for re calibration before using it again?
thanks.
Chris.