Grass Valley Imagestore 750 v.2.0.1 - Manual (Page 85)

Imagestore 750 User Manual Front Panel Operations
Miranda Technologies Inc. Page 85
Setup
Sets the Masking values.
Left
Use the joystick arrows ⊳ to adjust the value. Press enter to move to the
next mask parameter or escape to cancel.
Right
Use the joystick arrows ⊳ to adjust the value. Press enter to move to the
next mask parameter or escape to cancel.
Top
Use the joystick arrows ⊳ to adjust the value. Press enter to move to the
next mask parameter or escape to cancel.
Bottom
Use the joystick arrows ⊳ to adjust the value. Press enter to accept the
changes made to the mask parameters or escape to cancel. Note that in order
to accept a change to any of the four masking parameters you have to press
enter to accept each of the four parameters in turn.
C, G & T (Clip, Gain & Transparency)
Clip
Clip is the level under which the key signal will be forced to black. In a
keying process this will result in a total absence of fill video in areas where
the incoming key signal is less than the clip level.
Gain
The gain level amplifies the key signal, forcing grey levels towards and up to
white. In a keying process this will result in the fill signal being less
transparent than it otherwise would be in areas with a grey key signal.