Graphical display of chroma keyer controls
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United States of America Patent
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May 6, 1997
Grant Date -
N/A
app pub date -
Feb 27, 1995
filing date -
Feb 27, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A graphic display for chroma keyer controls presents background hue as a radial spoke of an outer chroma vector circle, with selectivity being displayed as a wedge about the radial spoke. Foreground suppression may be added to the graphic display by providing a concentric inner chroma vector circle with the foreground suppression hue being a radial spoke of the inner circle and foreground selectivity being a wedge within the inner circle about such radial spoke. That portion of the outer circle that is overlapped by the inner circle is suppressed, or rendered invisible, so that the background chroma information appears as a torus about the inner chroma vector circle.
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