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darktable Chapter 6 part 1: 'color group' plugins
Well ... is the fifth or sixth time
I try to record this video tutorial.
So let me save you from "Hello friends and welcome ..."
because I don't think on saying it,
at least in this chapter.
I'll explain it:
I bought a new computer, brand new,
with the latest technology which I've assemble it myself.
I've done several test recordings, all failed,
and the last one I tried was a complete tutorial,
recorded in 1080 of over one hour.
When I finished I realized that Kazam,
the software I use to record, was paused.
So I'll do it again, armed with patience
and hoping you'll like it or that you'll see it someday...
Well, today we will continue the analysis of the color group plugins.
I've decided to work with new photos,
this time they are mine and I selected them because
I think they are more appropriate for the topic that we will discuss,
which is the color.
I chosed this picture of some flowers
with lots of colors and we'll see what we can do
when we play with color in DT.
We have a large collection of plugins,
so I've divide the chapter into several parts.
The first plugin is very curious:
'overexposed' [moved to basic group in version 1.1.1].
It is related to this other button
that indicate us the over and underexposed areas of the picture.
If I click it, it shows in black the overexposed areas
that have lost detail by excess of light and in white
the ones that lost details due to its the lack.
This tool is in all photo developing programs
and is important for guidance on the detail in highlights and shadows.
The difference is that DT provides a tool
to control the amount of light and shadows that DT set as a criteria
to indicate an area as over or underexposed.
I can use the sliders to expand or reduce the range.
This can be very interesting in terms of how we calibrated the monitor.
After a process of shooting and the corresponding post-production,
is quite frustrating to see that the result on paper
is not identical to the result on the screen.
Usually these problems are due to incorrect color management.
To manage the color of our computers
we have to properly calibrate the monitor,
which is done by a tool called colorimeter.
Sometimes, if we can't afford a colorimeter to control the brightness,
these controls can be used to correct deficiencies in our monitor.
In this way, we can compare our image with a printed copy
and correct brightness areas to be marked
by the tool over/under exposed indication.
It is a very interesting tool for these corrections,
although it is recommended to properly calibrate the monitor.
In this photo, for example, I realized that I should adjust some values
because I have this photograph on paper.
I think underexposure is not well represented,
as there are no markings on this dark area of the center.
The following is called 'Velvia'.
This name comes from a popular film from the analog era.
It was a film from FujiFilm
and was very famous for colors special intensity.
His fame has crossed the analog era
and found this name in filters and many photo editing programs plugins.
In DT this plugin works by regulating the saturation
of the most faded colors of the image.
In this photo we can see it in the muted greens and in the background.
If we adjust the strength slider we can see the before and after,
enhancing blues and violets.
These center leaf gets stronger as well as this delicate petals on the left.
These plugin tries to respect the already saturated tones.
The effect is very subtle.
'Mid-tones bias' changes the range of the effect,
applying to the already saturated tones.
You can get an over-saturation below 0.50.
It is an interesting plugin for architecture photographs, landscapes, macro
and not for portraits,
because it would damage the delicate human skin tones.
For that we have other plugins.
Subtitles by Paulo C. Santos Garcia