[Digikam-users] ICC file for Ricoh GXR

[Martin (KDE)]

Am 20.07.2012 10:07, schrieb Marie-Noëlle Augendre:
> Thanks for these precisions.
> In these specific usages you're refering to, I'm just wondering whether
> these photographers wouldn't rather use tethering methods; so having an
> ICC profile for their camera would be more or less irrevelant as they
> will use their computer screen rather than the camera display.

Hm, I don't know what they use but I doubt that they use the camera
display for more than checking the scene and a basic guess of exposure.

Human eye is not exact regarding colour (neither it is exact regarding
exposure). That is the reason why profiling is available and used. How
do you know if the red is the same red as in the shooting a few hours
ago in the morning sun. If you need technical exact colour you have to
use technical methods to accomplish this.

I once read about a fashion photographer who profiled every shooting he
did. If the shooting took more than a day he profiled it more than once.
That does not mean, that he will not adjust the colour in post
processing but the base he can start from is known. Keep in mind that
they take thousands of pictures. So better use some time before and set
a fixed and well known base point than changing colour in every photo
individually.

Afaik you don't have to create an ICC profile every time. I think that
professional programs can handle colour target (like IT8) internally.

Martin

> 
> Marie-Noëlle
> 
> 2012/7/20 Martin (KDE) <kde at fahrendorf.de <mailto:kde at fahrendorf.de>>
> 
> 
>     A profiled camera is required if you have to produce the exact same
>     colour of an object under different lights (outside in bright sunlight
>     or in the shadow of a tree or in your studio) with different lenses and
>     different cameras. This requires an exact white balance setup and a
>     colour profiling.
> 
>     As an example: If you want to document the change of colour of a subject
>     you have to make sure that the colour in your photo has a reference (the
>     ICC profile and the base target you used for profiling).
> 
>     But If you see photograph as an art and your personal way of seeing
>     things profiling is wast of time. It is wast of time if you don't use a
>     exact profiled monitor (and with this I mean monitors in the 2000€
>     range) an profiled working environment (lights around your monitor) and
>     a profiled printer.
> 
>     IMHO the first step is to profile your monitor and use labs using
>     profiled printers (and share their printer profile). Profiling your
>     monitor is not that expensive (about 100€ - 200€). For this you have to
>     use at least a monitor with IPS or VA panel and about 95% match of sRGB
>     gamut.
> 
>     Yust my thoughts
>     Martin
> 
> 
> 
> 
> -- 
> <http://www.marie-noelle-augendre.com/photos/>
> 
> Mes dernières photos sont dans ma galerie
> <http://www.marie-noelle-augendre.com/photos/>.
> Retrouvez-moi aussi sur mon blog <http://www.mnaugendre.com/>.
> Et parcourez les Cévennes à ma façon avec Cévennes Plurielles
> <http://www.cevennes-plurielles.com/>,
> 
> 
> 
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