On 21 October 2015 at 11:47, bugbear <bugb...@papermule.co.uk> wrote:
>>
>> In this situation you need to calibrate vignetting and camera response
>> separately - then only optimise exposure and white balance in a project
>> where shadows move around.
>
> I'm not sure how that would work; the "vignette" (AKA non uniform lighting)
> is much larger than a single image. Surely vignette calibration applies to
> (correct) a single image?

The vignetting calculation corrects a uniform light fall-off between
the centre of the image and the edges, this should be consistent for
any camera/lens/aperture/zoom setup, so you only need to calculate it
once. Similarly the camera response curve should be consistent for
each camera sensor (depending on your RAW workflow).

Optimising these things in a scene where stuff moves around results in
the blown-out weird-colour output. It isn't going to help in the way
that optimising a,b,c,d,e lens parameters sometimes helps with
parallax.

In your difficult scene, optimising exposure (Eev) and white balance
(red/blue parameters) can't go much wrong and should be fine.

-- 
Bruno

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