Mascior's Calibration Disc - Page 4 - AVS Forum
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Display Calibration > Mascior's Calibration Disc
mascior's Avatar mascior 11:29 AM 04-13-2013
Just to clarify the differences between my APL patterns and others. My 2%, 10%, and coming soon 5% patterns have a background with a constant 22% stimulus level that never changes. My theory behind this is to see how all stimulus levels from 0% through 100% behave surrounded with a constant 22% stimulus level background. This applies to my grayscale, gamma, and color sweeps. The GCD disc for example (excluding there 1% APL patterns) changes there backgrounds to keep a constant 22% APL on the screen regardless of what stimulus is being displayed. This got me thinking and I decided to do a comparison of my 10% APL patterns vs the GCD 10% APL patterns. The results were surprisingly similar considering the fact that background levels between the two vary. What was even more surprising is how close both gamma's tracked. I uploaded some graphs below:

Before: My disc After: GCD








PeterLewis's Avatar PeterLewis 12:08 PM 04-13-2013
Mascior,at what apl percentage are your 4% and 2% patterns?

Thanks for working on the 5% for us.We greaty appreciate all your hard work and efforts.smile.gif
mascior's Avatar mascior 12:24 PM 04-13-2013
Quote:
Originally Posted by PeterLewis View Post

Mascior,at what apl percentage are your 4% and 2% patterns?

Thanks for working on the 5% for us.We greaty appreciate all your hard work and efforts.smile.gif

The 2% APL patterns have a constant 22% stimulus level background and the 4% APL patterns average between 18%-25% APL.
zoyd's Avatar zoyd 12:50 PM 04-13-2013
Quote:
Originally Posted by mascior View Post

The 2% APL patterns have a constant 22% stimulus level background and the 4% APL patterns average between 18%-25% APL.

How do you get 18-25% average stimulus for the the 4% APL patterns? The ones with the blocks around the edges right? The average stimulus of those has got to be pretty low, maybe 2%.
mascior's Avatar mascior 01:15 PM 04-13-2013
Quote:
Originally Posted by zoyd View Post

How do you get 18-25% average stimulus for the the 4% APL patterns? The ones with the blocks around the edges right? The average stimulus of those has got to be pretty low, maybe 2%.

Your probably correct. I wasn't sure exactly if I was measuring my 4% APL patterns properly. It's easy to measure my other APL patterns because the nature of the pattern. Any advise? Thanks in advance.
zoyd's Avatar zoyd 03:33 PM 04-13-2013
Quote:
Originally Posted by mascior View Post

Your probably correct. I wasn't sure exactly if I was measuring my 4% APL patterns properly. It's easy to measure my other APL patterns because the nature of the pattern. Any advise? Thanks in advance.

Actually I think you are close, are the edge blocks 2% area each and the center 4%? If so then the average stimulus range is 19.1% - 23.1% and the average luminance range (gamma=2.2) is 11.7% - 15.7%
mascior's Avatar mascior 03:59 PM 04-13-2013
Quote:
Originally Posted by zoyd View Post

Actually I think you are close, are the edge blocks 2% area each and the center 4%? If so then the average stimulus range is 19.1% - 23.1% and the average luminance range (gamma=2.2) is 11.7% - 15.7%

Yes, 2% blocks around the perimeter representing the entire grayscale in 5% steps with 4% windows in the center.
ndaa75's Avatar ndaa75 09:56 AM 04-14-2013
Quote:
Originally Posted by zoyd View Post

Actually I think you are close, are the edge blocks 2% area each and the center 4%? If so then the average stimulus range is 19.1% - 23.1% and the average luminance range (gamma=2.2) is 11.7% - 15.7%

Hi Zoyd

Can i ask what formula you used to reach the above mentioned figures in respect of both luminance and stimulus?

Thanks
zoyd's Avatar zoyd 10:46 AM 04-14-2013
Quote:
Originally Posted by ndaa75 View Post

Hi Zoyd

Can i ask what formula you used to reach the above mentioned figures in respect of both luminance and stimulus?

Thanks

I forgot the 95% stimulus block so I was a little off, here are the correct numbers.

for stimulus:

edge blocks+1 central block = 21 * 2% = 42% of total area
average stimulus of 21 blocks ranging from 0 to 1 in 5% increments = 0.5

average stimulus = 42% area * 0.5 + 2% (x 0) = 21% (0% 2nd central pattern)
average stimulus = 42% area * 0.5 + 2% (x 1) = 23% (100% 2nd central pattern)

for luminance with gamma = 2.2 you have to take each 5% level and raise to the power 2.2 before taking the averages:

edge blocks+1 central block = 21 * 2% = 42% of total area
average luminance of 21 blocks ranging from 0 to 1 in 5% increments = 0.322

average luminance = 42% area * 0.322 + 2% (x 0) = 13.5% (0% central pattern)
average luminance = 42% area * 0.322 + 2% (x 1) = 15.5% (100% central pattern)
dreameruk's Avatar dreameruk 11:15 AM 04-14-2013
Love your disc MASCIOR. Finally got it downloaded and i have to say it's very slick, with a great design.

Excellent work, especially for us Chromapure users.
mascior's Avatar mascior 12:32 PM 04-14-2013
Quote:
Originally Posted by dreameruk View Post

Love your disc MASCIOR. Finally got it downloaded and i have to say it's very slick, with a great design.

Excellent work, especially for us Chromapure users.
Thank you! REV_004 should be out soon with more fun patterns to play with.smile.gif
gadgtfreek's Avatar gadgtfreek 12:39 PM 04-14-2013
Awesome. My only request would be 75/75 patterns in a section by themselves. You can access them easily enough though, and they are the recommended amplitude and saturation for a VT50.
PeterLewis's Avatar PeterLewis 03:56 PM 04-14-2013
Quote:
Originally Posted by mascior View Post

Thank you! REV_004 should be out soon with more fun patterns to play with.smile.gif

Thanks Chief...
JimP 01:14 AM 04-15-2013
Quote:
Originally Posted by gadgtfreek View Post

Awesome. My only request would be 75/75 patterns in a section by themselves. You can access them easily enough though, and they are the recommended amplitude and saturation for a VT50.

Another Chromapure user here with a VT50.

I'd like to see them in one area as well with the 18% and 25% APLs and 5% window size.
prsut's Avatar prsut 02:38 AM 04-15-2013
Quote:
Originally Posted by gadgtfreek View Post

Awesome. My only request would be 75/75 patterns in a section by themselves. You can access them easily enough though, and they are the recommended amplitude and saturation for a VT50.

+1

for oppo 103 + panasonic gt50
mascior's Avatar mascior 05:27 AM 04-15-2013
I'm finished with all of REV_004's rendering and will be authoring for the next couple of days. I put my new 75/75 amp/sat pattern sweeps in there proper window size "sections"(2%, 4%, 6.5%, 4%APL, & 5%APL) on new pages. I added an entire 5% APL (22%) suite in the APL size selection. I also added more calibration options for my existing 4% APL patterns. Made a few cosmetic changes and adjusted some menu structures. All in all I think it turned out pretty good and will be ready for download later on this week!smile.gif
ndaa75's Avatar ndaa75 06:02 AM 04-15-2013
Quote:
Originally Posted by mascior View Post

I'm finished with all of REV_004's rendering and will be authoring for the next couple of days. I put my new 75/75 amp/sat pattern sweeps in there proper window size "sections"(2%, 4%, 6.5%, 4%APL, & 5%APL) on new pages. I added an entire 5% APL (22%) suite in the APL size selection. I also added more calibration options for my existing 4% APL patterns. Made a few cosmetic changes and adjusted some menu structures. All in all I think it turned out pretty good and will be ready for download later on this week!smile.gif

Good job mate.
zoyd's Avatar zoyd 08:20 AM 04-15-2013
Quote:
Originally Posted by mascior View Post

This got me thinking and I decided to do a comparison of my 10% APL patterns vs the GCD 10% APL patterns. The results were surprisingly similar considering the fact that background levels between the two vary. What was even more surprising is how close both gamma's tracked. I uploaded some graphs below:

I've found that gamma on plasmas varies primarily as a function of average input stimulus (assuming you are well below where ABL drops it) and your 10% APL as well as 4% APL and the GCD 10% are in a relatively stable range so your results are nice confirmation of that.
gadgtfreek's Avatar gadgtfreek 08:34 AM 04-15-2013
I checked chads 4% vs the 6.5 and 10 on this disc on my vt50. They were all pretty darn close so I am just using the 6.5% windows and not losing and sleep smile.gif
ndaa75's Avatar ndaa75 09:41 AM 04-15-2013
Quote:
Originally Posted by zoyd View Post

for luminance with gamma = 2.2 you have to take each 5% level and raise to the power 2.2 before taking the averages:

Hi Zoyd,

When you raised each 5% level, what was the formula you used? Im struggling to understand this correctly!

Thanks
zoyd's Avatar zoyd 11:06 AM 04-15-2013
5% stimulus => 0.05^2.2 = 0.00137 = 0.137% luminance
Ryan25's Avatar Ryan25 04:29 PM 04-15-2013
Hmm, I burnt the AVCHD file to a DVD and the PS3 won't read it. It recognizes it as a data disc...

Wow, just did some research, this is not for the novice is it?
mascior's Avatar mascior 09:17 PM 04-15-2013
Quote:
Originally Posted by Ryan25 View Post

Hmm, I burnt the AVCHD file to a DVD and the PS3 won't read it. It recognizes it as a data disc...

Wow, just did some research, this is not for the novice is it?

What software did you use to burn my pattern file to disc? It sounds as though you burned a data disc instead of an image file disc. I have tested both my Bluray and AVCHD versions on a PS3 with no issues. Download ImgBurn(a free download), right click on my file that you downloaded, it should give you burning options, select burn a disc using ImgBurn, and this should allow you to properly burn a copy that would be usable on your PS3. Please let me know if you have anymore questions or issues.
Ryan25's Avatar Ryan25 10:56 PM 04-15-2013
Quote:
Originally Posted by mascior View Post

What software did you use to burn my pattern file to disc? It sounds as though you burned a data disc instead of an image file disc. I have tested both my Bluray and AVCHD versions on a PS3 with no issues. Download ImgBurn(a free download), right click on my file that you downloaded, it should give you burning options, select burn a disc using ImgBurn, and this should allow you to properly burn a copy that would be usable on your PS3. Please let me know if you have anymore questions or issues.
I'll give it a shot in the morning. Thanks for the info!
gadgtfreek's Avatar gadgtfreek 08:18 AM 04-16-2013
Just to be certain. If I go into say the 6.5% windows, and choose 75% color. Those are all 100% saturation and 75% amplitude, then of course the 100% windows are 100% saturation and 100% amplitude?

I've been using the 75% amp windows, which of course generally accepted for gamut is 75 amp and 100 saturation. Just wanted to make sure i didnt have a brain fart.
mascior's Avatar mascior 10:50 AM 04-16-2013
Quote:
Originally Posted by gadgtfreek View Post

Just to be certain. If I go into say the 6.5% windows, and choose 75% color. Those are all 100% saturation and 75% amplitude, then of course the 100% windows are 100% saturation and 100% amplitude?

I've been using the 75% amp windows, which of course generally accepted for gamut is 75 amp and 100 saturation. Just wanted to make sure i didnt have a brain fart.

Yes, you are correct.smile.gif
mascior's Avatar mascior 04:29 PM 04-16-2013
REV_004 is posted! The AVCHD and Bluray versions are both ready for download. Please let me know of any issues. Thanks.smile.gif
gadgtfreek's Avatar gadgtfreek 05:06 PM 04-16-2013
Awesome thanks. Your 6.5% windows and 75 Amp 100 Sat windows have been very helpful on my VT50. PQ is great!
PeterLewis's Avatar PeterLewis 05:12 PM 04-16-2013
Quote:
Originally Posted by mascior View Post

REV_004 is posted! The AVCHD and Bluray versions are both ready for download. Please let me know of any issues. Thanks.smile.gif

Thanks,,,Lil buddy.smile.gif
Ryan25's Avatar Ryan25 05:21 PM 04-16-2013
Quote:
Originally Posted by Ryan25 View Post

I'll give it a shot in the morning. Thanks for the info!
Worked out, wish I had some more technical ability to really get the maximum result. I'm pretty impressed at how close THX Bright was, bumped brightness and sharpness a tad and that was that.
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