6.2.2 Fill Piecewise Linear

The fill piecewise linear mapping function allows the user to build a mapping with a piecewise linear fit from a set of mapping pairs (or break points). This mapping is used in the fill operation. The mapping pairs are a list of from values and a list of corresponding to values (see below). The from values are a list of image values specifying the input values at the break points, while to values indicate the output values at the break points. Values are calculated between each mapping pair entered. The values are determined by the nearest integer to the line drawn between each mapping pair.

From:
A slider (or scale widget) that allows the user to select the input mapping values.

To:
A slider (or scale widget) that allows the user to select the output mapping values.

Set:
Accept the currently selected from and to values as indicated by the sliders. The new values are entered in the from and to scrolled lists at the appropriate position to maintain ascending order in the from scrolled list.

From List:
A scrolled list of the currently selected input mapping values (from values). Moving the scrollbar on this list automatically moves the scrollbar on the To List to the corresponding position.

To List:
A scrolled list of the currently selected output mapping values (to values). Moving the scrollbar on this list automatically moves the scrollbar on the From List to the corresponding position.

Clear:
Remove all from and to values from the scrolled lists.

Delete:
Remove the currently selected from and to value pair from the corresponding scrolled lists.

OK:
Close the piecewise linear mapping panel. The actual mapping is not calculated until the user selectes Apply from the main fill window.