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yellobie
Joined: 18 Sep 2008
Posts: 3
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| Posted: Thu Sep 18, 2008 6:00 am Post subject: Please advice for my Plasma Calibration |
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Hi,
First I will like to thank Kal for the wonderful calibration guide for dummies. It's a gem! And now, after several calibration attempts, I wish to improve the PQ further but am stuck on what to do. Was hoping for some advices here. Thanks in advance!
My setup is a 42" Panasonic Plasma PV70 series (similar to PX70), connected to Mac Mini thru HDMI. Calibration disc used, or rather file for me, is from alluringreality at AVS forum here. These images were great! The sensor used is Eye-One LT, and the calibration is done thru my Macbook running WinXP.
Below are the screenshots of the last calibration done.
Measurements
Luminance
Gamma
RGB Levels
CIE Diagram
The picture quality is nice for the brighter side, but I notice the dark scenes seems to lose details. While trying out Batman Begins, some dark scenes looks like big patches of black. This feels odd as I was expecting more details in the background.
For the Luminance graph, I can get one very close to the reference, but the contrast setting have to be lowered, when right now its already at the 43% mark. Had view the picture when contrast is 0, but the picture looks dull.
As for the gamma, is there any way where I can shift the whole gamma graph up? Since the Mac Mini is connected to it, i was thinking maybe i can adjust the gamma for the output, but have absolutely no idea how to 
Anyone can give some tips on fine tuning? Thanks!
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hariskar
Joined: 01 Dec 2008
Posts: 18
Location: Greece/Kavala
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| Posted: Fri Jan 09, 2009 8:34 am Post subject: |
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Are these settings for day or for night viewing conditions? If it is for night I think you should lower contrast to to achieve ftL 30-32. Of course it is a matter of personal taste.
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Display: Pioneer PDP-428XD
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kal
Forum Administrator
Joined: 06 Mar 2006
Posts: 18114
Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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| Posted: Fri Jan 09, 2009 4:58 pm Post subject: Re: Please advice for my Plasma Calibration |
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| yellobie wrote: | | The picture quality is nice for the brighter side, but I notice the dark scenes seems to lose details. While trying out Batman Begins, some dark scenes looks like big patches of black. This feels odd as I was expecting more details in the background. |
Your graphs are fantastic. Looks really good.
Why do you think you should be seeing something instead of big patches of black? What makes you say this?
If you crank up the contrast temporarily do you actually see something? If not, you're not losing anything unless your setup is clipping blacks (something that calibration can't resolve).
Kal
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yellobie
Joined: 18 Sep 2008
Posts: 3
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| Posted: Mon Jan 12, 2009 1:24 am Post subject: |
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| hariskar wrote: | | Are these settings for day or for night viewing conditions? If it is for night I think you should lower contrast to to achieve ftL 30-32. Of course it is a matter of personal taste. |
Both actually  For my place, the ambient light from surroundings are quite bright, thus brighter output from my plasma is better??
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yellobie
Joined: 18 Sep 2008
Posts: 3
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| Posted: Mon Jan 12, 2009 1:30 am Post subject: Re: Please advice for my Plasma Calibration |
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| kal wrote: | | yellobie wrote: | | The picture quality is nice for the brighter side, but I notice the dark scenes seems to lose details. While trying out Batman Begins, some dark scenes looks like big patches of black. This feels odd as I was expecting more details in the background. |
Your graphs are fantastic. Looks really good.
Why do you think you should be seeing something instead of big patches of black? What makes you say this?
If you crank up the contrast temporarily do you actually see something? If not, you're not losing anything unless your setup is clipping blacks (something that calibration can't resolve).
Kal |
Thanks for replying! I actually crank up the contrast to compare, and during the higher contrast phase, I can actually see some details of the walls, more part of the person face and so on in the black patch area.
It has been a while since i first posted the calibration result, and now I'm liking my plasma! Maybe it took some time for newbies like me to adapt to the lower contrast from a tv set.
Thanks alot for providing the tutorial! 
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hariskar
Joined: 01 Dec 2008
Posts: 18
Location: Greece/Kavala
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| Posted: Mon Jan 12, 2009 8:25 am Post subject: |
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| yellobie wrote: | | hariskar wrote: | | Are these settings for day or for night viewing conditions? If it is for night I think you should lower contrast to to achieve ftL 30-32. Of course it is a matter of personal taste. |
Both actually For my place, the ambient light from surroundings are quite bright, thus brighter output from my plasma is better?? |
They say so. I use my night settings also for day and I like it.
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Display: Pioneer PDP-428XD
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dsskid
Joined: 20 Apr 2009
Posts: 28
Location: Long Island, NY
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| Posted: Sat Jun 27, 2009 3:53 pm Post subject: |
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Is it true that in HCFR that the gamma reading of 2.2 is really 2.5? That a reading of 1.9 more accurately represents the 2.2 standard?
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mark143
Joined: 18 Mar 2009
Posts: 2
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| Posted: Wed Jul 01, 2009 12:51 am Post subject: Gamma Problems |
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Most likely this is a gamma issue. Try setting it to 2.3. I was able to achieve this by adjusting brightness & contrast. My Pioneer plasma is calibrated at 28 ftL. Every display is different. For the brightness, you may want to try the test pattern in Avia or THX.
You may want to try Calaman also. It has a target value for xyY. It is a lot easier in setting the optimum luminance
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WanMan
Joined: 19 Mar 2006
Posts: 10270
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| Posted: Wed Jul 01, 2009 4:38 am Post subject: |
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Plasma has its limitations in reproducing 'black', or the absence of light. The pixels themselves are excited by energy that produces non-visible light. Its when this energy strikes the pixel walls that color in the visible spectrum is revealed. But the energy needs to taper off for a fade-to-black condition to take place, and it is in this area that plasma is limited.
Additionally, I am not so sure you are going to benefit from high-CR roles in an environment that will ultimately make it impossible to observe.
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