Blue is magenta tinted after iscan Duo auto cal - AVS Forum
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post #1 of 14 Old 09-29-2012, 08:24 PM - Thread Starter
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Hi guys - I hope someone can help me with this strange problem.

I have calibrated my Pioneer Kuro PDP508 (Australia) using the iscan Duo and I1 Display2, Autocal and interactive workflows (PS3 source). No matter what I do I always end up with a blue with a 'magenta'/pink tint. The calibrated blue point is inside the CIE chart (Red and Green and secondaries all with DE's <2). The delta for blue is 5.76. If I manually move the point using interactive it will give me a visual 'blue' but I can't get the delta E any lower than 15 at best. Should the Duo be able to give me a more accurate 'blue' (i.e. low Deltas etc) or is this a problem with the Pioneer? My results without the Duo seems overall more visually acceptable.

Cheers

Goro007
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post #2 of 14 Old 09-29-2012, 09:15 PM
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Quote:
Originally Posted by goro007@ozemail. View Post

Hi guys - I hope someone can help me with this strange problem.
I have calibrated my Pioneer Kuro PDP508 (Australia) using the iscan Duo and I1 Display2, Autocal and interactive workflows (PS3 source). No matter what I do I always end up with a blue with a 'magenta'/pink tint. The calibrated blue point is inside the CIE chart (Red and Green and secondaries all with DE's <2). The delta for blue is 5.76. If I manually move the point using interactive it will give me a visual 'blue' but I can't get the delta E any lower than 15 at best. Should the Duo be able to give me a more accurate 'blue' (i.e. low Deltas etc) or is this a problem with the Pioneer? My results without the Duo seems overall more visually acceptable.
Cheers
Goro007

Could you post some charts for your results?

My guess is that your blue is undersaturated, so a dE of 5 may be as cloas as you can get.

Also what software are you using?

Joel Barsotti
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post #3 of 14 Old 09-29-2012, 09:23 PM
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The I1D2 is doing it if you have not profied it.
What city are you in?

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post #4 of 14 Old 09-30-2012, 02:38 AM - Thread Starter
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Hi guys - thanks for the response.

I'm in Melbourne Aus.

I'm running Calman 4.6.4 (latest version).

Here are the charts.

AutoCal version which gives the magenta blue

Autocal.jpg 123k .jpg file

Manual correction which gives way off delta

Gamma.jpg 21k .jpg file ColorGamut.jpg 69k .jpg file RGB.jpg 69k .jpg file Grayscale.jpg 79k .jpg file

CalWldLif how do you profile the meter?

Thx Goro007
Attached Images
File Type: jpg Autocal.jpg (123.4 KB, 23 views)
File Type: jpg Gamma.jpg (20.7 KB, 20 views)
File Type: jpg ColorGamut.jpg (69.2 KB, 22 views)
File Type: jpg RGB.jpg (68.5 KB, 15 views)
File Type: jpg Grayscale.jpg (79.3 KB, 18 views)
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post #5 of 14 Old 09-30-2012, 04:29 AM
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Quote:
Originally Posted by goro007@ozemail. View Post

Hi guys - thanks for the response.
I'm in Melbourne Aus.
I'm running Calman 4.6.4 (latest version).
Here are the charts.
AutoCal version which gives the magenta blue
Thx Goro007

From the charts it looks like your blue gamut is well under luminance. The white limiter control on the Duo needs to be lowered. This can be done via thr Duo's OSD or in CalMAN DDC. SInce you have CalMAN v4 you should be using the Duo workflow which includes a step for adjusting the white limiter.

Derek

CTO / Founder - SpectraCal Inc.
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post #6 of 14 Old 09-30-2012, 05:09 AM - Thread Starter
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Hi Derek

Where exactly on the Duo do I find the 'white limiter'?

Goro007
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post #7 of 14 Old 09-30-2012, 05:34 AM
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Quote:
Originally Posted by goro007@ozemail. View Post

Hi Derek
Where exactly on the Duo do I find the 'white limiter'?
Goro007

From the Duo OSD: Output Setup > CMS > Color Gamut > White-Y (note that is the big Y not small) reduce it to -0.2

From CalMAN DDC: 100% White Y (again this is the big Y) reduce it to -20

Remeasure your Blue gamut luminance

Derek

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post #8 of 14 Old 09-30-2012, 09:45 AM
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Quote:
Originally Posted by goro007@ozemail. View Post

Hi guys - I hope someone can help me with this strange problem.
I have calibrated my Pioneer Kuro PDP508 (Australia) using the iscan Duo and I1 Display2, Autocal and interactive workflows (PS3 source). No matter what I do I always end up with a blue with a 'magenta'/pink tint. The calibrated blue point is inside the CIE chart (Red and Green and secondaries all with DE's <2). The delta for blue is 5.76. If I manually move the point using interactive it will give me a visual 'blue' but I can't get the delta E any lower than 15 at best. Should the Duo be able to give me a more accurate 'blue' (i.e. low Deltas etc) or is this a problem with the Pioneer? My results without the Duo seems overall more visually acceptable.
Cheers
Goro007

Quote:
Originally Posted by goro007@ozemail. View Post

CalWldLif how do you profile the meter?
Thx Goro007
The D2 color meter can read red and blue wrong.
They work well when profiled against a spectro
In Calman there is a process for creating the profile.
But you need a reference meter to do it.
f you were close to me I could make you a profile.
Sorry.

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post #9 of 14 Old 09-30-2012, 10:01 AM
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Quote:
Originally Posted by goro007@ozemail. View Post

Hi guys - thanks for the response.
I'm in Melbourne Aus.
I'm running Calman 4.6.4 (latest version).

If you purchased CalMAN 4 within the last year, you are eligible for an upgrade to CalMAN 5, which does a much better job with gamut AutoCal.

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post #10 of 14 Old 10-01-2012, 05:31 AM - Thread Starter
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Quote:
Originally Posted by sotti View Post

If you purchased CalMAN 4 within the last year, you are eligible for an upgrade to CalMAN 5, which does a much better job with gamut AutoCal.

Quote:
Originally Posted by derekjsmith View Post

From the Duo OSD: Output Setup > CMS > Color Gamut > White-Y (note that is the big Y not small) reduce it to -0.2
From CalMAN DDC: 100% White Y (again this is the big Y) reduce it to -20
Remeasure your Blue gamut luminance

Thx Derek. I haven't had the chance to try this yet. Should I then need to recalibrate the whole color gamut?
Quote:
Originally Posted by CalWldLif View Post

The D2 color meter can read red and blue wrong.
They work well when profiled against a spectro
In Calman there is a process for creating the profile.
But you need a reference meter to do it.
f you were close to me I could make you a profile.
Sorry.

Thx anyway. I might look at upgrading.
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post #11 of 14 Old 10-07-2012, 04:30 AM - Thread Starter
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Hi guys. Thanks for all the suggestions.

I upgraded to Calman 5. It's really made a big difference. Straight up my my gamut luminance has improved. Blue is much better at DE of under 5. I'm still going to try and get this down (I'm a perfectionist) but I'm pretty happy as is.

Derek what does changing the White Y do?

Goro007


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post #12 of 14 Old 10-07-2012, 07:22 AM
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^^^^ according to your report, blue is undersaturated. There isnt much calman nor the Duo can do about that because they cant add color. Nice job on everything else.....
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post #13 of 14 Old 10-07-2012, 09:32 AM
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^^^^ according to your report, blue is undersaturated. There isnt much calman nor the Duo can do about that because they cant add color. Nice job on everything else.....

Yes but CalMAN 5 has some very specific code to handle undersaturated primaries where CalMAN v4 does not. CalMAN v4 AutoCal can do bad things with undersaturated primaries.

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post #14 of 14 Old 10-09-2012, 05:59 AM - Thread Starter
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Hi Joel - really great effort on version 5. As from my charts, a great result achieved within an hours work. smile.gif
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