Television – Camera – system and detail – Combined image signal generator and general image signal...
Patent
1994-04-12
1996-04-16
Groody, James J.
Television
Camera, system and detail
Combined image signal generator and general image signal...
348630, 348643, 348663, H04N 904, H04N 521, H04N 5208, H04N 964
Patent
active
055087418
ABSTRACT:
In an image pickup apparatus having a low-pass filter for detecting a luminance component of an image pickup signal and a band-pass filter for detecting a contour component of the image pickup signal, a digital system for performing a digital signal processing action is arranged to have the low-pass filter and the band-pass filter not cascade-connected to each other. The arrangement is such that the signal processing action is performed without bringing about any spurious contour, any deterioration in frequency characteristic, etc., due to place cancelling peculiar to a digital system. The apparatus reduces the possibility of deterioration of images, permits simplification of circuit arrangement, permits reduction in electric energy consumption and in scale of the circuit, and thus facilitates adoption of an integrated circuit arrangement.
REFERENCES:
patent: 4887252 (1989-12-01), Miyakawa et al.
patent: 5124787 (1992-06-01), Lee et al.
patent: 5253047 (1993-10-01), Machishima
patent: 5353058 (1994-10-01), Takei
patent: 5386249 (1995-01-01), Strolle et al.
Canon Kabushiki Kaisha
Groody James J.
West Nina N.
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