Television – Image signal processing circuitry specific to television – Special effects
Patent
1998-02-18
2000-09-26
Peng, John K.
Television
Image signal processing circuitry specific to television
Special effects
348722, 348586, 348590, 348592, H04N 975
Patent
active
061248967
ABSTRACT:
A corner detector capable of detecting each corner position of a predetermined area from an input signal with a simple structure. There is provided memory means (9B) for storing memorizing an input signal (keyT) and corner detection means (9C) for detecting a point where the signal level becomes the reference signal level or more at first by reading an input signal stored in the memory means sequentially in horizontal direction from an upper limit and a lower limit of a retrieval scope and in vertical direction from the left end to the right end of the retrieval scope, and detecting a point where the signal level becomes the reference signal level or more at first by reading an input signal stored in the memory means sequentially in a diagonal direction at a predetermined angle from each angle of the retrieval scope to detect from the detected points four points whose positions differ. With such means, each corner position of the area of the detection object can be detected with a simple structure and quickly.
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Desir Jean W.
Frommer William S.
Peng John K.
Sony Corporation
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