Image analysis – Image enhancement or restoration – Edge or contour enhancement
Reexamination Certificate
2008-06-24
2008-06-24
Kim, Charles (Department: 2624)
Image analysis
Image enhancement or restoration
Edge or contour enhancement
C382S263000
Reexamination Certificate
active
07391919
ABSTRACT:
This invention has as its object to provide an edge correction apparatus which can execute base clip processes optimal to different noise levels depending on the level of an input signal. To this end, an apparatus has a high-frequency extraction circuit for extracting a high-frequency signal equal to or more than a predetermined frequency from an input signal, a suppression circuit for suppressing signal components equal to or less than a suppression level from the extracted high-frequency signal, a setting circuit for setting the suppression level in correspondence with the signal level of the input signal, and a high-frequency emphasis circuit for emphasizing the high-frequency signal suppressed by the suppression circuit.
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Canon Kabushiki Kaisha
Kim Charles
Morgan & Finnegan , LLP
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