Re: RAW data and gamma correction

David J Taylor <david-taylor@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

> I am now wondering where the conversion between linear space (what the
> sensor takes and what is in the RAW file - more ot less) and
> gamma-corrected space (what would be in the final 8-bit JPEG if that's
> what you produce) would take place. Do raw convertors include both the
> de-Bayer function, and a gamma-correction function?

Yes, that's right.

> Are the 16-bit files produced linear or gamma-corrected?

Gamma-corrected. They could be linear, but if they were, you would know it
because you would have done that on purpose.

> Is there a colour-space function defined along with the 16-bit data which
> says "I am linear data", and it is the responsibility of PSP-10 to convert
> from linear to gamma-corrected when it reads in the file?

There could be, but there isn't (unless there is; see above). You could have
linear data tagged with a 1.0-gamma color profile. But, again, you don't.

--
Jeremy | jeremy@xxxxxxxxxxx
.

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