Apparatus for correcting vertical aperture of an image

Details Apparatus for correcting vertical aperture of an image Apparatus for correcting vertical aperture of an image

1993-09-10

1995-07-04

Kostak, Victor R.

Television

Image signal processing circuitry specific to television

Transition or edge sharpeners

348252, 348625, H04N 5208

Patent

active

054304997

ABSTRACT:
An apparatus for correcting a vertical aperture of an image generates a vertical aperture correction signal having no line pair component contained therein from a signal read out at every frame from an imaging apparatus using an imaging device of pixel mixing system, the circuit arrangement for realizing the vertical aperture correcting apparatus being such that an original signal, a 2H (H is a horizontal scanning period) delay signal and a 4H delay signal are generated from the imaging device and a sum of the original signal and the 4H delay signal is subtracted from the 2H delay signal to thereby generate a vertical aperture correction signal and also the circuit arrangement being such that luminance signal spectral characteristics are approximated at every horizontal scanning by adjusting a gain of a signal read out from the imaging device.

REFERENCES:
patent: 3804980 (1974-04-01), Lowry
patent: 4698673 (1987-10-01), Johnson
patent: 5057923 (1991-10-01), Matsuda
patent: 5144399 (1992-09-01), Nakayama et al.
patent: 5268758 (1993-12-01), Nakayama et al.

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