METHOD AND APPARATUS FOR COMPOSITING VIDEO IMAGES
A method and apparatus to improve the control signal Ec(1) used in a video i mage compositing system so that the adjustment to achieve an Ec of just zero for green objects and flesh tones, does not simul taneously reduce Ec in grey scale subjects and cause pri nt-through. The invention also reproduc...
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| Format: | Patent |
| Sprache: | eng ; fre |
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| Zusammenfassung: | A method and apparatus to improve the control signal Ec(1) used in a video i mage compositing system so that the adjustment to achieve an Ec of just zero for green objects and flesh tones, does not simul taneously reduce Ec in grey scale subjects and cause pri nt-through. The invention also reproduces a wide range of blue colors from pale blue to bright blue in the presence of a blue backing without ra ising a matte density control (11) and without raising noise level. The invention also provides a second control signal, Ek(4), that elim inates backing color spill from blond and brown hair, without affecting bright fore ground white tones. The invention also generates a SHADO W CLEAN-UP signal (5) that eliminates foreground shadows, while preserving mos t of the foreground detail information. |
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