Image analysis – Color image processing
Reexamination Certificate
2005-11-29
2005-11-29
Johns, Andrew W. (Department: 2621)
Image analysis
Color image processing
C358S517000
Reexamination Certificate
active
06970595
ABSTRACT:
A method for chroma key masking including for a given pixel color, calculating a quadratic function of the pixel color coordinates based on a prescribed chroma key color, the quadratic function corresponding to an ellipsoid in a color space, generating a substantially transparent mask value for the given pixel color, if the quadratic function is less than a prescribed lower threshold, generating a substantially opaque mask value for the given pixel color, if the quadratic function is greater than a prescribed upper threshold, and generating a partially transparent mask value for the given pixel color, based on the value of the quadratic function, if the quadratic function is between the prescribed lower threshold and the prescribed upper threshold. A system is also described and claimed.
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Alavi Amir
Martine & Penilla & Gencarella LLP
Sonic Solutions, Inc.
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