Defective pixel correction circuit

Details Defective pixel correction circuit Defective pixel correction circuit

1995-05-31

1998-09-08

Peng, John K.

Television

Camera, system and detail

Combined image signal generator and general image signal...

348247, 348241, 348250, 348615, 348616, 382308, H04N 964

Patent

active

058052160

ABSTRACT:
A defective pixel correction circuit corrects a defective pixel in a solid imaging device such as a CCD exactly and sufficiently. A boundary detection circuit calculates magnitudes of boundaries from signals of eight peripheral pixels taken in a pixel taking-in circuit and a boundary ordering circuit compares the calculated magnitudes of the boundaries with one another to order the magnitudes of the boundaries. An interpolation circuit produces an interpolation signal in accordance with an interpolation method determined by an interpolation method determining circuit on the basis of the order of the ordered boundaries to correct the defective pixel.

REFERENCES:
patent: 4517600 (1985-05-01), Reitmeier
patent: 4541116 (1985-09-01), Lougheed
patent: 4701784 (1987-10-01), Matsuoka et al.
patent: 4783840 (1988-11-01), Song
patent: 4817174 (1989-03-01), Nakatani
patent: 4858013 (1989-08-01), Matsuda
patent: 5144446 (1992-09-01), Sudo et al.

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