| If all required settings in “source image” and “reference values” are ready you can move to the “process” tab. |
|
You first need to tell darktable-chart which of the patches represent
the gray ramp. In the screenshot displayed further above the gray ramp is positioned in
the lower part of the color reference chart, denoted as “GS00...GS23”.
The input “number of final patches” defines how many editable color patches the resulting style will use within the color look up table module (for more details see Section 3.4.1.8, “Color look up table”).
By clicking the “process” button you start the calculation.
The quality of the result in terms of average delta E and maximum delta E are displayed below the button. These data show how close the resulting style applied to the source image will be able to match the reference values – the lower the better.
| Once you are happy with the result you can click on “export” and save the generated style. |
|
You supply a style name and a style description under which the style will later appear in
darktable. darktable-chart saves the style as a
.dtstyle file which can be imported into darktable (see
Section 2.3.10, “Styles”) and shared with others.
The “export raw data as csv” button allows you to save the extracted raw data
as a CSV file for debugging purposes or later usage. darktable-chart
offers a command line option to produce a style with the desired number of final patches
from a supplied CSV file (see Section 1.1.4, “darktable-chart binary”).
