Crystal Vision
Control Descriptions
Background
Saturation
This control helps compensate for a poorly saturated
camera output in FG backdrop areas. Ideally, a well lit
backdrop would produce a 100% saturated colour
output from the camera - but this is rarely the case.
While monitoring the output key and with max clip set
to 100, adjust this control to provide an even and low
noise key in the backdrop area. The max clip control
can then be adjusted to amplify the key to full level.
This control is automatically set by quick setup.
Balance and
Tints
Suppression
Hue
Set the colour that will be used by the Foreground
suppression circuitry. Monitor the Keyed FG signal
and adjust this control to suppress the chroma key
backdrop colour. Note that often there is a variation in
backdrop colour caused by lighting etc. so adjust this
control to give the best suppression in the most
noticeable areas. This control is best adjusted with the
suppression control set mid-way and the acceptance
control set to 90 degrees to see the effect most clearly.
Note also: this control rarely needs adjusting after
auto setup.
Foreground
Balance
This control moves the acceptance window of the FG
suppressor circuitry about the selected backdrop hue.
This control is useful when the FG objects contain
colours close to the backdrop colour and so can help
minimise desaturation of some FG colours while
maintaining good backdrop colour suppression.
Foreground
Tints
This control allows areas of the foreground that
contain low saturation levels of the backing colour to
be passed without being suppressed.
Lighting Compensation
Compensate for a poorly lit backdrop.
Safire 3 User Manual R1.3
35
24 March 2017