[argyllcms] Re: Generated camera profile too bright
- From: "Andreas F.X. Siegert" <lists@xxxxxxxxxxxxx>
- To: argyllcms@xxxxxxxxxxxxx
- Date: Tue, 03 Apr 2012 07:47:18 +0200
On 03.04.2012 06:06, Graeme Gill wrote:
> Andreas F.X. Siegert wrote:
>> I think I got fooled by the exposure because of the background.
>> But even if I push the exposure before generating the linear tiff I get
>> the overexposed patches.
>
> Hmm. Looking at the .tif, white is at around 16%. So the resulting profile
> will boost everything by a factor of about 600% - which is exactly
> what it's done. Is this really what you intend ?
Nope definitely not. That is the original one before started to push
the exposure in the app.
> (Normally you would want to expose the image so white is near 100%.)
Maybe I am misunderstanding something here. Exposure in camera oder
pushing later on in linear mode?
When I got close to overexposure on the white patch in profiled mode
with the stock profile and then switched over to linear to generate the
calibration TIFF, I still had a profile that resulted in in blown patches.
cheers
afx
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