NX Black, White and Neutral Control Points
To follow up on Stephens post. A couple more screen captures.
In the first screen capture one Neutral, a Black, and a White point have been placed.
Neutral Control Point is used to correct colour cast in the image. The manual suggests that you can place several of these on an image to correct for multiple colour casts.
Black Control Point will cause the targeted colour to become black and will affect all dark tones in the image.
White Control point will cause the targeted colour to become white and will affect all light tones in the image.
To assist in placing either the black or white point the Double Threshold box on the histogram pallet should be checked.The displayed image will then appear as grey with some pixels black and others white. This is to assist in placing these points if they are used. Attached is a screen capture to show the control available in setting either White or Black points. The effect of the selection on the normal image view is immediately visible by unchecking the ' Double threshold ' box.
Once set on the image these points can be moved, values changed, be turned on and off or deleted.
Don
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