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Once the Despill color slider is moved to position 0 (the left-hand side), the algorithm will
automatically remove the green colour component if this is the keyed colour (similarly – blue
if the background is blue). Once the Despill color slider is moved to position 1000 (the right-
hand side), however, the algorithm will automatically add the red colour and the blue colour
(if the keyed colour is green) or red and green (if the background is blue).
The value of the algorithm is controlled by means of the Despill coarse function. If the keyed
background is green, after a certain threshold of the Despill coarse function is crossed, the
green component is entirely eliminated from the object in the RGB (red, green, blue) space,
which results in the transition of colours into the purple (magenta) area.
A view after the green component has been eliminated
Another function enables a more accurate adjustment of the above problem.
The use of the Despill fine function eliminates the keyed background colour from the object,
but this time on the basis of the chrominance components.
The Despill fine slider
After the application of Despill coarse, which is used for preliminary correction, more accurate
adjustments can be made, and so the Despill fine settings may not have any significant impact
on the algorithm if Despill coarse is set to high.
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