You can use curves to expand or depress the tonal range. after that you can manipulate the contrast of the foto using the tone curve.
2017-04-30 18:45 GMT+03:00 David Vincent-Jones <[email protected]>: > A tone-curve can be 'reshaped'/bent (non linear more complex adjustment) > > Levels can only have changes made to end and mid points (3 points of > change) > > On 04/30/2017 05:26 PM, [email protected] wrote: > > On Sat, 29 Apr 2017 09:16:12 +0200 > Remco Viëtor <[email protected]> <[email protected]> wrote: > > > On vendredi 28 avril 2017 23:42:34 CEST I. Ivanov wrote: > For me it's mostly a balance between ease of use and precision of > the correction: > - "Exposure" (or "levels") are easy to use, but only have 2 (or 3) > points to adjust. They are the only ones that allow precise > correction of white and black point. > - "Tonecurve" is the most precise for anything but black and white > points, but requires more care, and I find it difficult to use for > the dark tones. (hint for devs: add a logarithmic mode like for the > basecurve?) > - "Zones" is somewhere in between, although I won't try to correct > black and white point with it. > > "Exposure" has the added advantage that you can correct black and > white points in both directions, the others only allow you to narrow > the range. I find that the initial conversion can be too eager to > clip highlights; this cannot be recovered with "levels" or > "tonecurve", but only(?) with exposure. Tip: look up luminosity > masks. > > > Thank you for all the tips, but I still don't understand what's the > difference between the levels and the tone curve. > > I wish somebody would add to the documentation: > > * list of modules doing similar jobs > * this one is better at this, this one is better at that... > > I'm just trying to understand and I'm sure I could do a much better > PP if I understood what I'm doing > > > > > ____________________________________________________________________________ > darktable user mailing list to unsubscribe send a mail to > [email protected] > -- Nickolas M. Vassou ____________________________________________________________________________ darktable user mailing list to unsubscribe send a mail to [email protected]
