Signal processing circuit for a solid-state image pickup device

Details Signal processing circuit for a solid-state image pickup device Signal processing circuit for a solid-state image pickup device

1989-11-09

1991-08-27

Peng, John K.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 50, 358 51, H04N 904

Patent

active

050438034

ABSTRACT:
A signal processing circuit of a solid-state imaging device has an image pickup section formed by plural solid-state image sensors including a discrete pixel array. The solid state image sensor for green-color image pickup is arrayed in the image pickup section with a spatial shift equal to one half the pixel pitch from the solid-state image sensors for red-color image pickup and the solid-state image sensors for blue-color image pickup in accordance with the spatial pixel shifting method. An optical low-pass filter having a cut-off frequency equal to fs is provided on the front surfaces of these solid-state image sensors. The green-color image pickup output signal, the red-color image pickup output signal and the blue-color image pickup output signal, produced at the solid state image sensors of the image pickup section, are subjected to A/D conversion, followed by phase processing with the sampling phases of the respective digital signals matched with one another, to produce high-quality image output signals having satisfactory modulation transfer function (MTF) characteristics and containing lesser amounts of aliasing components.

REFERENCES:
patent: 4464685 (1984-08-01), Wilkinson
patent: 4506294 (1985-03-01), Nagumo

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