Optical image defocus correction

Details Optical image defocus correction Optical image defocus correction

1992-03-27

1994-04-26

Powell, Mark R.

Facsimile and static presentation processing

Facsimile

Image reproduction system

348349, 348241, H04N 308

Patent

active

053071751

ABSTRACT:
In an optical/electrical imaging system, optical depth of focus corrections are accomplished electronically. A plurality of defocus states of the optical system are measured and/or determined and image restoration coefficients corresponding to each of these states are stored. The state of defocus of the imaging system is then determined by deriving an image from a target having known characteristics, which are then correlated to determine a state of defocus. A microprocessor is utilized to provide appropriate defocus correction information to an electronic filter, thereby providing an adaptive filtering arrangement.

REFERENCES:
patent: 4287536 (1981-09-01), Wiggins
patent: 4295167 (1981-10-01), Wiggins
patent: 4446548 (1984-05-01), Bouwhuis et al.
patent: 4573070 (1986-02-01), Cooper
patent: 4613986 (1986-09-01), Ataman et al.
patent: 4660082 (1987-04-01), Tomohisa et al.
patent: 4661852 (1987-04-01), Mourier
patent: 4704632 (1987-11-01), Van Den Heuvel
patent: 4712010 (1987-12-01), Alm
patent: 4731657 (1988-03-01), Miyagi
patent: 4751376 (1988-06-01), Sugiura
patent: 4888650 (1989-12-01), Abuyama
patent: 4912569 (1990-03-01), Petilli
patent: 4918543 (1990-04-01), Petilli
patent: 4922087 (1990-05-01), Nakajima
patent: 4942479 (1990-07-01), Kanno
patent: 4987450 (1991-01-01), Yamada
patent: 5016110 (1991-05-01), Vuichard
patent: 5043803 (1991-08-01), Asaida
patent: 5107337 (1992-04-01), Ueda
patent: 5150217 (1992-09-01), Senuma

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