Hi Russell,

It think this is to expected as the lightable images will for speed be derived 
from the embedded jpeg's in the raw file and hence have the camera's colour 
correction applied to them.  When you go to darkroom mode you are then opening 
the raw image itself and will have no colour corrections (apart from any 
defaults)  until you start working on the raw.  The banding is probably because 
the embedded jpeg has more limited bit depth than the raw image.

There is I believe a preference setting to turn off use of the embedded jpegs 
in light table, which would avoid the effects you have observed at the price of 
slowing things down.  That isn't something I want to do myself so I haven't 
experimented with it.

Rgds,
Rob.

-----Original Message-----
From: Russell Edwards [mailto:[email protected]]
Sent: 14 March 2013 11:21
To: [email protected]
Subject: [Darktable-users] Colours in lighttable image

Often I feel colours look different in the lighttable. Usually I assume this is 
a trick of the eye (brain).

But just now I have found one that is obviously so.

https://www.dropbox.com/s/4an7w05ncqsfcaz/IMGP0214.DNG

With this image, click it in lighttable and hold 'z'. You will see an aqua-blue 
sky with obvious colour quantisation banding.

Now double-click to darkroom and you will see a more purple sky with no banding 
visible.

At least - that's what I see.

Comments?

Russell


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