Image analysis – Image enhancement or restoration – Image filter
Patent
1994-05-06
1996-08-27
Boudreau, Leo H.
Image analysis
Image enhancement or restoration
Image filter
348252, 348625, 382266, G06K 900
Patent
active
055509363
ABSTRACT:
In an image processing system, an outline correction of image data and a smoothing for noise removal are performed. Generally, the outline correction is performed by emphasizing a high frequency component, and the smoothing is performed by removing the high frequency component. Within one image data, by properly switching the emphasizing and the removal of the high frequency component, while the outline correction is carried out, the noise removal can be performed. An absolute value of a high frequency component Fa extracted from the image data Pi by a first differential filter is compared with a discrimination threshold value K, and depending on the comparison result, either Fa or -Fa as the correction data Fo is selected by a selector and is added to the image data Pi. As a result, when Fo=Fa, the high frequency component is emphasized, and when Fo=-Fa, smoothing is performed. A pixel interpolation and a multi picture formation are also disclosed.
REFERENCES:
patent: 4334244 (1982-06-01), Chan et al.
patent: 4953114 (1990-08-01), Sato
patent: 4991021 (1991-02-01), Nikoh et al.
patent: 4998122 (1991-03-01), Kanno et al.
patent: 5023919 (1991-06-01), Wataya
patent: 5208873 (1993-05-01), Nakajima
patent: 5231677 (1993-07-01), Mita et al.
"The Design of a High Bit Rate HDTV Codec", Elmer, 1990 (Signal Processing of HDTV, II.
Bamba Noriko
Chiba Kazuhiro
Inamura Mamoru
Nagayama Takeshi
Someya Jun
Boudreau Leo H.
Kelley Chris
Mitsubishi Denki & Kabushiki Kaisha
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