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post #1 of 166 Old 12-13-2012, 08:24 PM - Thread Starter
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Here's some test patterns I made on my Quantum Data pattern generator. I converted them to .PNG format and double checked the windows against CalMAN RGB tripletts. They are all generated with video levels, with black at 16. If playing on a media server, RGB PC levels should be used. Also, the .PNG format makes them ideal for use with the VideoForge pattern generator, which is how I use them now.

First are some normal (non APL) very small windows. They are approximately 4% size. normal 4% windows with pluge.zip 116k .zip file

Second are the same window sizes but in APL flavor loosely based on inspiration I got from the AVS 709 APL windows- thanks Alluringreality! They are in between the AVS 709 large and small APL size. apl 4% windows with pluge.zip 523k .zip file

Third is some miscellaneous patterns. custom test patterns.zip 97k .zip file

The gamma pattern is especially useful for checking 10 point white balance control mistracking. Example: with settings at default, take the blue (or whatever color you want to check) control at, say, 80% and turn it all the way down. Then display the gamma pattern. Run the contrast control up and down and observe if the discolored square remains at 80% or if it moves up to, say, 90%.

The color pattern can be used with the color filters for a quick meterless check of color decoder nonlinearities, as it has matching levels at 50, 75, and 100%. If red, for example, blends in with the gray surround at 50% (bottom horizontal row) and 75% (middle row) but is darker than the surround at 100% (top row), you know your color decoding is nonlinear and you can take steps to correct it (lower contrast, change panel brightness, etc).

The aspect pattern is handy for adjusting anamorphic lenses or lens memories on front PJs.

NEW!

AVCHD ISO image thanks to Vega509

75% Saturation / 75% Level APL Gamut patterns
aplReducedSaturation.zip 105k .zip file

75% Saturation / 75% Level normal approx 4% windows
standardReducedSat.zip 21k .zip file
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post #2 of 166 Old 12-14-2012, 02:36 AM
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Chad, for the ST50 the more accurate pattern for calibrate grayscale and cms :

- the AVS small APL
- the AVS Large APL
- the AVS windows
- the GCD APL
- the GCD windows
- the Chad B patterns biggrin.gif
- others...

thanks Chad smile.gif
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post #3 of 166 Old 12-14-2012, 03:17 AM
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questions :

- in the gamma pattern why 13% stimulus ?
- APL pattern : color is 100 % sat 100 % luminance or another ?
- normal windows pattern : color it's indicate 75 but 75 % sat 100 % Lum or 100 % sat 75 % lum or 75 % sat/lum ?

Thank Chad wink.gif
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post #4 of 166 Old 12-14-2012, 03:29 AM
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Perhaps some documentation with a how to use the rest of the patterns from the custom set ex: brightness, contrast, gs_color ...
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post #5 of 166 Old 12-14-2012, 04:16 AM
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Thanks for taking the time to do this and give these to the DIY public. I just reread your instructions on the gamma pattern! That is really freaking cool! Could have used that while manually trying to calibrate that JVC RS40! Thanks again!
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post #6 of 166 Old 12-14-2012, 06:38 AM
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Thanks Chad for taking care of us.

Which of you 4% pattern would you recommend for a 55GT30,reg or with apl ?
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post #7 of 166 Old 12-14-2012, 08:29 AM
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The Pluge (Black Bar)? Should brightness be set to where it is just visible? On my WDTV Live +, I had to turn brightness down to -39 to do so! (9G Kuro)

bob
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post #8 of 166 Old 12-14-2012, 06:19 PM - Thread Starter
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Quote:
Originally Posted by realzven View Post

questions :
- in the gamma pattern why 13% stimulus ?
- APL pattern : color is 100 % sat 100 % luminance or another ?
- normal windows pattern : color it's indicate 75 but 75 % sat 100 % Lum or 100 % sat 75 % lum or 75 % sat/lum ?
Thank Chad wink.gif

For some reason the Quantum Data software does not have a 15% option, so I used 13%. I could fix it with other software, but it still gets the job done just fine.

All patterns are 100% saturation/75% levels.
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post #9 of 166 Old 12-14-2012, 06:22 PM - Thread Starter
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Quote:
Originally Posted by airscapes View Post

Thanks for taking the time to do this and give these to the DIY public. I just reread your instructions on the gamma pattern! That is really freaking cool! Could have used that while manually trying to calibrate that JVC RS40! Thanks again!
Thanks, glad to do it. Yeah, that pattern makes it super easy to identify mistracking and is probably the most useful pattern of the bunch with all the new Sharps, Samsungs, Pannys, JVCs, etc that have 10 point controls.
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post #10 of 166 Old 12-14-2012, 06:26 PM - Thread Starter
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Quote:
Originally Posted by PeterLewis View Post

Thanks Chad for taking care of us.
Which of you 4% pattern would you recommend for a 55GT30,reg or with apl ?
Well, that's still a bit undecided. I will say I have used normal ones a lot more and gotten great results, but the theory behind APL patterns makes sense to me. I can't give you a clear answer on that.
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post #11 of 166 Old 12-14-2012, 06:30 PM - Thread Starter
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Quote:
Originally Posted by spongebob View Post

The Pluge (Black Bar)? Should brightness be set to where it is just visible? On my WDTV Live +, I had to turn brightness down to -39 to do so! (9G Kuro)
bob
Sounds like a levels mismatch. The patterns are made to video levels, with 16 being black and 235 being white. The WDTV should be set to RGB high PC levels for them to be right.

BTW, I shouldn't have said the window patterns have a pluge; in order to be a true pluge they should have a 2-4% bar, which they don't. But they do have the BTB bars, which are the other part of a pluge pattern. The brightness pattern is a true low APL pluge.
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post #12 of 166 Old 12-15-2012, 12:08 AM
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Quote:
Originally Posted by Chad B View Post

For some reason the Quantum Data software does not have a 15% option, so I used 13%. I could fix it with other software, but it still gets the job done just fine.
All patterns are 100% saturation/75% levels.

Thanks Chad wink.gif
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post #13 of 166 Old 12-15-2012, 08:52 AM
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Quote:
Originally Posted by Chad B View Post

Sounds like a levels mismatch. The patterns are made to video levels, with 16 being black and 235 being white. The WDTV should be set to RGB high PC levels for them to be right.
BTW, I shouldn't have said the window patterns have a pluge; in order to be a true pluge they should have a 2-4% bar, which they don't. But they do have the BTB bars, which are the other part of a pluge pattern. The brightness pattern is a true low APL pluge.

Thanks, Chad! That did it!

How about video output: 1080P 24hz or 60hhz? 8 bit or 16 color depth?

Which file is "the brightness pattern is a true low APL pluge"


thx,

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post #14 of 166 Old 12-15-2012, 02:17 PM
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Quote:
Originally Posted by spongebob View Post

Thanks, Chad! That did it!
How about video output: 1080P 24hz or 60hhz? 8 bit or 16 color depth?
Which file is "the brightness pattern is a true low APL pluge"
thx,
bob

I have specracals dbp2000 and there is a bug in the 1080p24 not sure if what you have is the same but here is a link to the procedure to test it.
http://www.spectracal.com/forum/viewtopic.php?f=94&t=4482
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post #15 of 166 Old 12-19-2012, 07:46 PM - Thread Starter
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I just did some exhaustive testing on my GT50 and 5% normal windows give great results taking many things into account; better than my APL windows. The 4% normal windows I posted above should be close enough to 5% to give nearly identical calibration results.
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post #16 of 166 Old 12-19-2012, 08:59 PM
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Chad,

In one of the other threads, someone mentioned that THX uses 6.5% windows.

Did you try 6.5% windows and if so, what was your findings?

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post #17 of 166 Old 12-19-2012, 10:54 PM
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Chad

How do we use the bright and contrast patterns in the custom patterns?

bob
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post #18 of 166 Old 12-20-2012, 08:13 AM
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I would really love some instructions on how to use the brightness and contrast test patterns.
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post #19 of 166 Old 12-20-2012, 08:30 AM
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Chad what do the numbers signify on the brightness and I am in the same boat as the others with how to use both these patterns.

Gota thank you for the gamma pattern again! I used that to see how much the cuts and drives effected each other, before doing the 2 point on my projector, it was very helpful. It was obvious on this particular display after cranking up each color, that the Drives effected the cuts far more than the other way around. Starting with 80 when doing a 2 point produced a better result with less fuss than starting at the low end like I would normally do.
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post #20 of 166 Old 12-20-2012, 09:05 AM - Thread Starter
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The brightness pattern top row numbers indicate what video percentage each bar is. The bottom row is just a mirror image of the top row. Use it to observe shadow detail performance and set brightness.

Absolute best black level method (my preferred method): Lower room light and get up very close to the display (it's OK to even cup your hands around your eyes if room light can't be extinguished and get within a few inches of the screen on flat panels, and it's OK to look slightly off axis at LCDs). Set brightness by bringing brightness up to the point where, standing up close to the screen, you can just barely make out the outlines of the BTB bars. Then back off brightness click by click until you can't make them out at all. In a nutshell, you do not want the black background to illuminate or dither at all above the MLL of the display.

More shadow detail method (OK for day modes or if you value shadow detail over black levels): do a similar procedure but in normal room lighting and from the normal viewing position. Since it is done from the viewing position in normal lighting, chances are the black background will illuminate just a bit in absolute terms.

Also use the brightness pattern to observe coloring and distinction of shadow detail. Make sure the bars don't have an obvious color tint and/or abrupt color shift, and evaluate how visible the shadow detail is.

Instruction for contrast pattern coming soon.
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post #21 of 166 Old 12-20-2012, 09:55 AM - Thread Starter
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Contrast pattern:

There is a pluge, starting at left with -2,2,-4,and 3% gray bars. That can be used for a quick visual check of brightness. There is a cross indicator at the middle to aid with meter positioning.

CRT instructions: watch for blooming (fuzzying and expansion) of the middle white block in relation to the medium brightness blocks above and below. Adjust contrast to a point just below where this occurs.

Normal instructions: There is a 104% strip in the middle of the white block and 98% strips surrounding the 104%. Ideally the contrast should be adjusted to a point just below where the 104% strip begins to discolor or blend in with the white block. You want to see the 104% strip and it should not be discolored.

No WTW instructions: Adjust contrast to a point just below where the 98% strips blend in with the white block. You want to be able to see them.
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post #22 of 166 Old 12-20-2012, 02:55 PM
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Hello, how do I go about using these patterns. Do I burn them to a disk ? will there be other versions besides in PNG format?
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post #23 of 166 Old 12-20-2012, 08:11 PM
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Chad, if its not too much trouble could you make a set of these in Just 2.4/2.35 aspect ratio? I run a CRT blend and everything is in 2.4 aspect. Some of these patters are great and Id love to use them for Setting up
my Blend.

Thanks

Athanasios
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post #24 of 166 Old 12-28-2012, 04:07 PM
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Quote:
Originally Posted by Chad B View Post

Here's some test patterns I made on my Quantum Data pattern generator. I converted them to .PNG format and double checked the windows against CalMAN RGB tripletts. They are all generated with video levels, with black at 16. If playing on a media server, RGB PC levels should be used. Also, the .PNG format makes them ideal for use with the VideoForge pattern generator, which is how I use them now.
First are some normal (non APL) very small windows. They are approximately 4% size. normal 4% windows with pluge.zip 116k .zip file
Second are the same window sizes but in APL flavor loosely based on inspiration I got from the AVS 709 APL windows- thanks Alluringreality! They are in between the AVS 709 large and small APL size. apl 4% windows with pluge.zip 523k .zip file
Third is some miscellaneous patterns. custom test patterns.zip 97k .zip file
The gamma pattern is especially useful for checking 10 point white balance control mistracking. Example: with settings at default, take the blue (or whatever color you want to check) control at, say, 80% and turn it all the way down. Then display the gamma pattern. Run the contrast control up and down and observe if the discolored square remains at 80% or if it moves up to, say, 90%.
The color pattern can be used with the color filters for a quick meterless check of color decoder nonlinearities, as it has matching levels at 50, 75, and 100%. If red, for example, blends in with the gray surround at 50% (bottom horizontal row) and 75% (middle row) but is darker than the surround at 100% (top row), you know your color decoding is nonlinear and you can take steps to correct it (lower contrast, change panel brightness, etc).
The aspect pattern is handy for adjusting anamorphic lenses or lens memories on front PJs.

Anyone know how to get these images to an avchd format so they can be played on a bluray player ? Would be similar to the avchd version of the avs709 disc.

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post #25 of 166 Old 01-02-2013, 02:31 AM
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Quote:
Originally Posted by chunon View Post

Anyone know how to get these images to an avchd format so they can be played on a bluray player ? Would be similar to the avchd version of the avs709 disc.

http://www.avsforum.com/t/1441407/grayscale-variances-different-patterns-plasma-calibration/120#post_22701310
http://www.avsforum.com/t/1441407/grayscale-variances-different-patterns-plasma-calibration/120#post_22702423

worked well for me...
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post #26 of 166 Old 01-02-2013, 07:26 AM
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I appreciate the info but that is alot to absorb, I am a total novice only time I ever burnt a avchd disc was avs709 and I think that was just an executable.

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post #27 of 166 Old 01-02-2013, 07:38 AM
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If you have a BR player that will play a thumb drive you can probably display them that way. Just copy them to a folder and display as images.
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post #28 of 166 Old 01-02-2013, 07:45 AM
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Quote:
Originally Posted by airscapes View Post

If you have a BR player that will play a thumb drive you can probably display them that way. Just copy them to a folder and display as images.

I'll look into that I think my Sony might have that capability, do I need to worry about any conversion errors etc ? Could you put on an SD card and use the tv interface ?

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post #29 of 166 Old 01-02-2013, 08:24 AM
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Quote:
Originally Posted by chunon View Post

I'll look into that I think my Sony might have that capability, do I need to worry about any conversion errors etc ? Could you put on an SD card and use the tv interface ?

The idea would be that the BRP would display the images as it would a BR disk and you make the adjustments to the HDMI input on the TV. If you display it from the TV what are you going to adjust .. No idea if you BR play will actually display the images correctly but one would hope so.
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post #30 of 166 Old 01-02-2013, 08:45 AM
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Gotcha ill give it a shot thanks

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