Grass Valley DD35 Family v.3.1.5 - Manual (Page 224)

3. Menu Operation DD35 Production Switcher
3 – 72 Operating Instructions – Rev. 16 / 10.2001
Selectivity C Selectivity center refers to the achromatic center of the color circle and acts on ob-
jects with slightly saturated key colors which cannot be influenced with Selectivity
R and Selectivity L.
Problem: The light blue shirt of a newscaster is slightly transparent after
adjustment. It could be made dense with DENSITY; however it
would lose its blue color.
Solution: Rotate Selectivity C in cw direction until the shirt is dense and
blue again. Correct possibly obtained blue fringes with
Selectivity L and Selectivity R.
Alternative: For reducing newly occurring blue fringes, first use DENSITY and
then Selectivity C as described above.
The Density control can be used to restore the density of the foreground object.
This may become necessary if the foreground object is slightly ”keyed” (transpar-
ent) as a result of blue spill and/or the required selectivity setting.
The Clean up control can be used to ”clean up” the background.
This may become necessary if the background contains noise or undesired shad-
ows etc.
Density
Clean up