This unpretentious button hides a powerful function: A further dialog opens, containing a list of all curve points (Freehand mode) or reference points (Spline or Polyline mode) of the top control curve being edited. These values may be changed and any changes made will be adopted by the current control curve when quitting the dialog with [OK]. If several control curves are switched on for editing, then FrankLIN will ask whether any changed data should be adopted by the top or all control curve(s).
Note that this function is not available for Bézier curves where it would be misleading – the icon disappears if the Bézier mode is selected.
These points can now be edited: A click on the relevant entry in
the list transfers the In
and Out
value pair to the
editable fields. New or altered values will be included or replaced in
the list by clicking on the Take
button. With Freehand
curves, the Delete
button resets the selected Out
value
to the In
value, as such control curves have to contain exactly
256 value pairs, so cannot have more or fewer; with Spline
curves the selected point is deleted, if present.
By clicking on the unit following the editable fields (p
or
%
) you can switch between greyscale values (curve points) or
percentage values for input as well as the listing.
The In
values represent the X position of the mouse cursor
in each case. They are the greyscale values that an image has before
being affected by the control curve, for instance.
The Out
values on the other hand represent the Y values
associated with the respective In
values. To put it another
way, the original greyscale values of an image (In values) will be
converted to these values by applying the control curve function.
