Hi, István, kösenem,
the principle is understood. The ToneEQ-created parameter mask does
only indirectly relate the tonal correction to the image areas. The
suggested series of parametric masks and related tonal corrections
OTOH gives direct control.
The ToneEQ-internal mask assigns a certain value to each pixel which
it derives from some sophisticated operations including (AFAICS) a
combination of low-pass and hi-pass filtering (without that it would
just act as a normal RGB/luminosity curve tool) which does not give
you a direct control on what's happening to a certain pixel, and that
value does not directly indicate the effect on the image pixel but
determines which part of the tonal correction curve gets applied. The
approach has its benefits I am sure but it is rather indirect and may
require many iterations to get what one wants in some cases.
Uwe
Quoting KOVÁCS István <k...@kovacs-telekes.org>:
Tone EQ allows you to apply different exposure compensations to
different parts of the image.
You can achieve a similar effect by creating several instances of
exposure, e.g. one without a mask, so set overall brightness; one with
+1EV to lift the shadows, with a parametric mask; and one with -1 EV
to tame highlights, again with a parametric mask.
Tone EQ basically does the same: it blurs the image to create a
'mask', and then allows you to specify what exposure compensation to
apply to which masked range. So it's like automatically creating a
mask for -8 EV (dark shadows), -7 EV etc., up to 0 EV (white), and
assigning each of them to another instance of the exposure module.
____________________________________________________________________________
darktable user mailing list
to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
____________________________________________________________________________
darktable user mailing list
to unsubscribe send a mail to darktable-user+unsubscr...@lists.darktable.org
