Recursive filter and image display apparatus including the same

Details Recursive filter and image display apparatus including the same Recursive filter and image display apparatus including the same

1990-04-17

1991-05-21

Westin, Edward P.

X-ray or gamma ray systems or devices

Electronic circuit

Exposure timer

358111, 358105, 358167, H05G 164, H04N 5213, H04N 532

Patent

active

050181793

ABSTRACT:
A recursive filter for reducing image noise, in which a subtracter calculates a subtraction between first and second images to obtain a subtraction result, and a factor table determines an addition ratio between the first and second images on the basis of the subtraction result, and in which an adder adds the first and second images at the addition ratio to obtain a third image. An image display apparatus including the recursive filter is also disclosed.

REFERENCES:
patent: 4639784 (1987-01-01), Fling
patent: 4646153 (1987-02-01), Fukuda et al.
patent: 4663773 (1987-05-01), Haendle et al.
patent: 4677478 (1987-06-01), Kruger et al.
patent: 4679086 (1987-07-01), May
patent: 4816681 (1989-03-01), Shimura
patent: 4860104 (1989-08-01), Katsuyama
patent: 4954894 (1990-09-01), Kitaura

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