Datacolor User to User Support Group.

In the Expert Console I can select Native white point, but how do you set Native Gamma? The Spyder3 continues to try and calibrate to 2.2 gamma. The DataColor website says, 

"Advanced feature allows calibration of monitors to Native Gamma, or White Balanced Native Gamma."

Where are these settings? I am calibrating a Dell 2209WA 22" LCD monitor on a Windows XP Pro PC.

No response? Am I to assume this is some bogus marketing claim and that one CAN'T set Native Gamma?

--- In datacolor_group@yahoogroups.com, "chasp505" <ChasP505@...> wrote:

>
> In the Expert Console I can select Native white point, but how do you set Native Gamma? The Spyder3 continues to try and calibrate to 2.2 gamma. The DataColor website says, 
> 
> "Advanced feature allows calibration of monitors to Native Gamma, or White Balanced Native Gamma."
> 
> Where are these settings? I am calibrating a Dell 2209WA 22" LCD monitor on a Windows XP Pro PC.
>

Native gamma means profiling without calibration. This is really only  
for scientific purposes, but you can turn calibration off, and run the  
measure function in that state to produce a profile without  
calibration. Not a practical idea for general purposes, however.

C. D. Tobie
Global Product Technology Mngr.
Digital Imaging & Home Theater
Datacolor.com
CDTobie@...

On Jun 9, 2009, at 3:03 PM, "chasp505" <ChasP505@...> wrote:

> In the Expert Console I can select Native white point, but how do  
> you set Native Gamma? The Spyder3 continues to try and calibrate to  
> 2.2 gamma. The DataColor website says,
>
> "Advanced feature allows calibration of monitors to Native Gamma, or  
> White Balanced Native Gamma."
>
> Where are these settings? I am calibrating a Dell 2209WA 22" LCD  
> monitor on a Windows XP Pro PC.
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

This is not a Datacolor sponsored forum. We have no responsibility to  
answer here at all let, let alone on the same day. And certainly no  
responsibility to answer flames. Please reconsider your tone, and  
expectations, if you are looking for assistance.

C. D. Tobie
Global Product Technology Mngr.
Digital Imaging & Home Theater
Datacolor.com
CDTobie@...

On Jun 9, 2009, at 8:20 PM, "chasp505" <ChasP505@...> wrote:

> No response? Am I to assume this is some bogus marketing claim and  
> that one CAN'T set Native Gamma?
>
> --- In datacolor_group@yahoogroups.com, "chasp505" <ChasP505@...>  
> wrote:
>>
>> In the Expert Console I can select Native white point, but how do  
>> you set Native Gamma? The Spyder3 continues to try and calibrate to  
>> 2.2 gamma. The DataColor website says,
>>
>> "Advanced feature allows calibration of monitors to Native Gamma,  
>> or White Balanced Native Gamma."
>>
>> Where are these settings? I am calibrating a Dell 2209WA 22" LCD  
>> monitor on a Windows XP Pro PC.
>>
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

I apologize for the tone of my last post, but I am severely physically handicapped and can sometimes get oversensitive when I perceive that I've been ignored. The handicapped tend to get conditioned by society to be aggressively assertive.

That said, I find it odd that every vendor selling the Spyder3 Elite mentions this "advanced feature" in their descriptive text, but there is no reference to it in the Help files, the Knowledge Base at DataColor, or the many product reviews I've read. But your explanation reveals that it's a non-issue for my purposes.

Thank you, and again, please excuse my hair-trigger reply.

--- In datacolor_group@yahoogroups.com, Cdtobie <CDTobie@...> wrote:

>
> Native gamma means profiling without calibration. This is really only  
> for scientific purposes, but you can turn calibration off, and run the  
> measure function in that state to produce a profile without  
> calibration. Not a practical idea for general purposes, however.
> 
> C. D. Tobie
> Global Product Technology Mngr.
> Digital Imaging & Home Theater
> Datacolor.com
> CDTobie@...
> 
> On Jun 9, 2009, at 3:03 PM, "chasp505" <ChasP505@...> wrote:
> 
> > In the Expert Console I can select Native white point, but how do  
> > you set Native Gamma? The Spyder3 continues to try and calibrate to  
> > 2.2 gamma. The DataColor website says,
> >
> > "Advanced feature allows calibration of monitors to Native Gamma, or  
> > White Balanced Native Gamma."
> >
> > Where are these settings? I am calibrating a Dell 2209WA 22" LCD  
> > monitor on a Windows XP Pro PC.
> >
> >
> >
> > ------------------------------------
> >
> > Yahoo! Groups Links
> >
> >
> >
>

Hi, David,

--- In datacolor_group@yahoogroups.com, Cdtobie <CDTobie@...> wrote:
>
> Native gamma means profiling without calibration. This is really only  
> for scientific purposes, but you can turn calibration off, and run the  
> measure function in that state to produce a profile without  
> calibration.

As I recall from my testing with OptiCAL, there, if one selects "profile" [only - not calibrate as well], the resulting profile file still includes a vcgt tag (ordinarily carrying the LUT load for the calibration process). I have assumed that this is essentially a "null" vcgt tag, such that an LUT loader, dealing with the profile, will not implant anything into the LUT.

1. Is that indeed so?

2. Is the situation the same for the "profile only" mode in Spyder3Elite?

Thanks.

Best regards,

Doug

Haven't tried it lately, so I can't make any guarantees, but thats the  
theory.

There is no such thing as "native gamma", as the native tone response  
curve will never be exactly a perfect gamma curve, nor will it be  
identical in all channels. It would be less misleading to call it  
something like "native tone response" or perhaps "native stock market  
graph" as it may well look more like that then like a gamma curve.

To leave the gamma untouched means making no adjustments to the  
videocard VLUTs. So these should be "null" in such an instance, though  
there will still be a tag for them in the profile.

Such a method leaves the screen off color, and may bias the eye in  
such a way that profiled images in colormanaged apps will not look  
correct.

C. D. Tobie
Global Product Technology Mngr.
Digital Imaging & Home Theater
Datacolor.com
CDTobie@...

On Jun 10, 2009, at 9:23 AM, "Doug Kerr" <doug.kerr@...> wrote:

> Hi, David,
>
> --- In datacolor_group@yahoogroups.com, Cdtobie <CDTobie@...> wrote:
>>
>> Native gamma means profiling without calibration. This is really only
>> for scientific purposes, but you can turn calibration off, and run  
>> the
>> measure function in that state to produce a profile without
>> calibration.
>
> As I recall from my testing with OptiCAL, there, if one selects  
> "profile" [only - not calibrate as well], the resulting profile file  
> still includes a vcgt tag (ordinarily carrying the LUT load for the  
> calibration process). I have assumed that this is essentially a  
> "null" vcgt tag, such that an LUT loader, dealing with the profile,  
> will not implant anything into the LUT.
>
> 1. Is that indeed so?
>
> 2. Is the situation the same for the "profile only" mode in  
> Spyder3Elite?
>
> Thanks.
>
> Best regards,
>
> Doug
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>

Hi, David,

--- In datacolor_group@yahoogroups.com, Cdtobie <CDTobie@...> wrote:
>
> Haven't tried it lately, so I can't make any guarantees, but thats the  
> theory.
> 
> There is no such thing as "native gamma", as the native tone response  
> curve will never be exactly a perfect gamma curve, nor will it be  
> identical in all channels. It would be less misleading to call it  
> something like "native tone response" or perhaps "native stock market  
> graph" as it may well look more like that then like a gamma curve.
> 
> To leave the gamma untouched means making no adjustments to the  
> videocard VLUTs. So these should be "null" in such an instance, though  
> there will still be a tag for them in the profile.
> 
> Such a method leaves the screen off color, and may bias the eye in  
> such a way that profiled images in colormanaged apps will not look  
> correct.

That all makes sense.

As an aside, I suspect that when the new Spyder3 software suites come out, I may upgrade from Pro to Elite.

Thanks.

Best regards,

Doug