On vendredi 28 avril 2017 23:42:34 CEST I. Ivanov wrote: > Mostly preference to my understanding. Levels and zone mapping are > targeting to lighten / darken certain areas. Tone curve is more complex > and affects also the color intensity. A good approach with tone curve is > to change to manual mode - then you can adjust lightness separately from > the color. My personal preference is between zone map and tone curve - > depending on the particular case. I rarely use levels. This is more of a > habit. > > Regards, > > B > > On 2017-04-28 09:52 AM, Bernhard wrote: > > and to make it even more diverse: > > > > I don't use both of them - I do black- and white-point in exposure > > module and use the zone module instead of curves ... > > > > > > regards > > Bernhard > > > > http://www.bilddateien.de > > > > David Vincent-Jones schrieb am 28.04.2017 um 18:02: > >> I am sure that we each have different ways of using these modules. I > >> do my basic processing with the tone curve and then as a close to > >> final step often (particularly with B&W) use the levels to shift the > >> gray mid-point. > >> > >> David > >> > >> On 04/28/2017 05:53 PM, [email protected] wrote: > >>> DT 2.2.4 > >>> > >>> What's the difference between the levels and the tone curve? > >>> > >>> * Should it be one or the other? > >>> * Which one is better/easier for setting the white point and the black > >>> > >>> point? > >>> > >>> * What are the differences? > >>> > >>> I've read the "introducing the levels module", it doesn't explain the > >>> difference 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. Remco ____________________________________________________________________________ darktable user mailing list to unsubscribe send a mail to [email protected]
