The Official ChromaPure thread - Page 108

You can do that now. A spreadsheet was posted on the Power law crushed blacks thread that provides all of the targets for BT.1886. I can also provide one as well if needed.

Michael did reply with a number of questions and this gave me chance to elaborate.

Result !

Lets hope he can help.

Thanks Tom found it. I tend to get the odd spike in gamma after running BT.1886 autocal so its good to know what the target should be so I can adjust

Thanks Tom. I found the spreadsheet too.
Question:
I understand BT.1886 is a newer method than power law gamma. Which one is better to use: BT.1886 or constant power law gamma (as you recommend in CP manual)?

I've made an attempt at implementing the custom test pattern outlined by JasperC in this post. However, I'm interstate at the moment and don't have my Duo with me so I can't test it. Anyone willing to give it a go?

New version is available here.

I'm thinking of uploading the source on Github if anyone is interested.

As far as I can tell, nothing on the Custom Test Pattern tab works.

Just downloaded it Michael.

See you've got a Custom Tab now.

Exactly what we need to generate some 75% saturation patterns on the Duo.

Will test it out as soon as possible.

Thank you.

Hi Tom,

Its definitely grayed out but if you connect the Panel to the Duo all springs into life.

Not tried adjusting its fields yet though.

Initial test here:
http://www.avsforum.com/t/1180042/new-dvdo-iscan-duo-2-0-firmware-released/3300#post_22547460

Needs more work.

Suggest we start posting this topic in the Duo thread, don't want to contaminate the CP thread

As far as I can tell, nothing on the Custom Test Pattern tab works.

Well Tom, this looks promising
http://www.avsforum.com/t/1180042/new-dvdo-iscan-duo-2-0-firmware-released/3300#post_22549897

Your take.

Yes, we got this working.

We'll have enhanced support for the Duo in our next release, which was just going to e a bug-fix release for 2.3.1, but now will have more goodies included.

FYI to any D3 Pro owners. I recently got mine checked out by Tom and he find little change, if any, from original. Its a year old and has been kept in an air tight case with desiccant.

Is manual control of the Duo through ChromaPure one of those goodies? or would we still either have to wear our thumbs out with the Duo's remote?

No need to use the remote at all. http://www.avsforum.com/t/1174468/the-official-chromapure-thread/3210#post_22546136

Click on "here"

Useful to know, thanks !

Tom

A year ago there was talk of supporting direct control of the Lumagen's through CP...is that not happening, or is it coming soon?

Thanks

Tom also said the same thing about the DVDO iScan Duo.

I am well aware of the latest development in the DVDO iScan Duo Control Panel program created by mdehoog. It is a terrific piece of work.

The problem is that if I want to use the ChromaPure Auto Calibration feature, I have to shut down the Control Panel program, restart ChromaPure and enable the Signal Generator for the Duo. Then, after completing the Auto Calibration, if I want to make any adjustments, I have to turn off the Signal Generator for the Duo in ChromaPure, shutdown and restart ChromaPure, then start the Control Panel program.

The thing is, Tom talked about manual control for the Duo and for the Lumagen a year ago, but it still hasn't been implemented. But when catmother e-mails mdehoog asking about accessing the internal pattern generator of the Duo to display patterns in various luminances and saturations, within 24 hours he provides a fully functional working version of his Control Panel program that does exactly that. It seems to me that the tools are out there to incorporate this kind of control into ChromaPure...they just aren't being utilized.

I'm confused. I have no issues using Chromapure and the Lumagen. Chromapure automatically sets the Lumagen to output the correct pattern and I routinely adjust the Lumagen to set RGBY when doing a manual grayscale/gamma calibration (for example). IIRC I can do the same thing with gamut adjustments.

I can't speak for the Lumagen as I don't have one, but in ChromaPure, you cannot control the CMS of the Duo manually. The feature is not built into the software. The only way the CMS is accessed is if you run ChromaPure's Auto Calibration mode. So, for example, I can run auto cal, and CP will change the values of the Duo's CMS, but when it's done, if I want to go and manually tweak the CMS, I can't do it in ChromaPure. I have to either use the Duo remote (which is arduously slow and extremely hard on your thumb) or, turn off ChromaPure's Duo access, restart ChromaPure and use mdehoog's Duo Control Panel program.

Also, in CP, you can't change the luminance or saturations of the patterns in the Duo. This, however, may change in the next release of CP, though it may never have happened if it wasn't for mdehoog's contributions.

What was talked about was a GUI in CP to directly access the Lumagen controls for manual adjustment, and not have to use the remote and bounce around between on screen menus

The turn of this discussion provides an excellent example of why I am reluctant to announce specific plans for future upgrades. Everyone has their favorite feature they want implemented. The fact is, we are working constantly on providing extra functionality and improving the product. If a specific feature has not made it in yet, that is only because we have been working on other things. It is not as if we have been sitting around doing nothing. I have about a million things on my plate to do in this regard, the vast majority of which the folks here aren't even aware of. And for the record, Duo enhancements will be shortly available not because of the great work of mdehoog, but because some mysterious member--who posted once and has since disappeared--leaked the necessary control codes on this thread. Thank you, mystery man.

While doing a 2pt grayscale calibration, is adjusting green a big no no? I had a small bump in green at 20 on a panasonic plasma, and taking Green Low to -2 fixed the issues. Just wondering because a lot of the times I only see people adjust Red and Blue.

From my perspective, not complaining about the control feature status, just curious. Very much appreciate your efforts with the program and your personalized support

You do appreciate, of course, how frustrating it can be when someone buys a product based on YOUR recommendation (I refer to your rave review of the Duo), then sends you money to buy your software, buys a meter from you and pays you extra to profile it, then gives you more money for an Auto Calibration add-on that will work with the Duo you spend $1000 on (bought elsewhere I should add), and then is promised manual control of the device, and then waits a year for some results, but meanwhile, sees the Lumagen add a 3d LUT feature via firmware and suddenly, within mere weeks, an update is issued to work with it.

Meanwhile, CalMan 5 has all the features ChromaPure has AND more, including the ones I was promised...

Can you see how that could be frustrating? ...and STILL you won't give any inclination that the manual control feature will EVER be added. In the meantime, DVDO has changed ownership, and the DVDO products will probably eventually die off.
Edited by Kilgore - 11/3/12 at 3:09pm

Many of us bought DUOs and then bought Lumagens when 3D LUT became available. I could have purchased my Lumagen from SpectraCal when their very attractively priced bundle was available at 3D LUT released. Instead, I bought my XS from Tom.

If Tom brings additional value to the DUO at some point I have a place to use it. I am sure Tom knows what the most important priorities for his business are. You can spend a few hundred and own Calman..or wait for Tom to deliver whatever it is he will deliver.. I have a hard time giving them (SpectraCal) my business when thire is an alternative.

I do have to admit the latest versions of Calman looks very nice. SpectraCal has a lot more resources to bring to bear so if you think the grass is greener........ well you know.
Edited by gtgray - 11/3/12 at 4:31pm

It is not good practice to adjust the green channel unless absolutely necessary. It has a huge impact on gamma.

To set the record straight

Did you mean this ?
http://www.avsforum.com/t/1174468/the-official-chromapure-thread/3180#post_22535887

It was a post that came out of the blue in response to my query here
http://www.avsforum.com/t/1174468/the-official-chromapure-thread/3120#post_22527705

After studying that post by JasperC (clearly beyond my pay grade) I decided to enlist the expert Michael (mdehoog) and passed the info from JasperC along. It was the info in that post that provided the clues that Michael properly interpreted to program the Duo. You see that my role was that of the liason guy.
The rest is history

And BTW being a subscriber to several CalMan threads I have been aware of CalMan's ability to invoke otherwise hidden Duo patterns for almost a year. It was this conviction that the Duo could be made to provide those patterns that motivated me to pursue this quest.

I am also confident that ChromaPure will be enhanced to take advantage Michael's work and eliminate a competitor's advantage.
Edited by catmother - 11/3/12 at 6:46pm

Thanks.