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US 2003/0151684 A1Published application
Contour-emphasizing circuit
AssigneeSony Corporation
InventorsShingo Shimazaki, Taku Kihara
Life of this patent
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AssigneeSony Corporation
InventorsShingo Shimazaki, Taku Kihara
Estimating the term…
An edge enhancement circuit (16) uses bandpass filters (21), (22) and (23) to separate an original video signal into low-, middle- and high-frequency band edge components which will be supplied to waveform shaping circuits (24), (25) and (26), respectively. Each of the waveform shaping circuits (24), (25) and (26) detects an amplitude peal level of the edge component, generates a fain coefficient based on the peak level, and multiplies the original video signal by the gain coefficient. The results of multiplication are added together to generate a final detail signal. Thus, the edge enhancement circuit (16) amplifies the amplitude of the edge component having a frequency approximate to the spatial frequency of the video signal to provide an edge enhancement based on a frequency characteristic corresponding to the spatial frequency of the video signal.
An edge enhancer comprising:
An edge enhancing method comprising steps of:
A video camera comprising:
Dependencies are inferred from the claim text.