Crystal Vision
Control Descriptions
Left/Top/Right/Bottom
These controls help compensate for uneven backdrop lighting.
By monitoring the output key and adjusting the lighting
compensation controls it is possible to minimise the effects of
lighting edge fade. With max clip set to 100, adjust the position
controls to provide as even a key distribution in the backdrop
area as possible. These controls are automatically set if 'auto
lighting' is selected in quick setup.
Radial
The lighting distribution of a spotlight is a bright centre that
fades away to the edges in a circular pattern. The Background
key produced when a spotlight is used to illuminate a chroma
key backdrop will reflect that lighting distribution. Increasing
key gain (max clip) will help compensate for that but at the
expense of fine detail. By monitoring the output key and
adjusting the lighting compensation controls it is possible to
minimise the effects of lighting edge fade. With max clip set to
100, adjust the radial and control to provide as even a key
distribution in the backdrop area as possible. These controls
are automatically set if 'auto lighting' is selected in quick
setup.
Aspect Ratio
Select the aspect ratio of the radial
lighting compensation to match the
image.
Brightness & Contrast
Adjust the lift and gain of the keyed FG and BG signals to produce a more
realistic composite.
Foreground
Adjust
FG
Lift/Gain/Chroma
These controls modify the FG video signal so it
matches the keyed Background in the final
composite. Monitor the output video and use the lift,
gain and chroma controls to achieve the best
results.
Safire 3 User Manual R1.3
36
24 March 2017