Can I really "see" a raw file?

Started 1 week ago | Questions thread
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Iliah Borg Forum Pro • Posts: 21,172
Re: WB pre-conditioning

sharkmelley wrote:

Iliah Borg wrote:

the WB pre-conditioning - is that just to re-aligin the R and B channels to the G after black subtraction?

There is significant variation between sensor samples. WB pre-conditioning is to compensate for the difference (there are other ways to do that as well), otherwise one needs to create separate colour transforms for each sensor sample. In effect, WB preconditioning is calibration.

The in-camera digital scaling which leads to the histogram gaps can, in some cases, lead to nasty coloured rings in the background when applying vignetting compensation to severely underexposed low ISO data.

The Sony A7S (I haven't tried other Sony cameras) is a particularly bad example.

https://www.cloudynights.com/topic/557931-concentric-coloured-rings-caused-by-flats/

I really can't see any good reason to cook the data in such a manner.

Mark

I don't think it is a good way. Supplying calibration data to deal with calibration in processing raw during conversion is IMHO a better one.

In you case, could it be vignetting compensation baked into raw?

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