Television – Image signal processing circuitry specific to television – Combined noise reduction and transition sharpening
Patent
1994-11-28
1997-04-15
Lee, Michael
Television
Image signal processing circuitry specific to television
Combined noise reduction and transition sharpening
348607, 382264, 36472401, H04N 521, H04N 5213
Patent
active
056214740
ABSTRACT:
A filter acting on digital image signals for apparatus of the video type includes at least first and second processing units adapted to elect an image edge, each processing unit includes an inferential circuit operating on fuzzy logic, which has first and second input terminals and an output terminal, and first and second comparison elements each having first and second input terminals and an output terminal, the input terminals being intended for receiving discrete digital signals of an image. The output terminals of the first and second comparison elements in the first processing unit are respectively connected to the first and second input terminals of the inferential circuit included in the first processing unit, and the output terminals of the first and second comparison elements in the second processing unit are respectively connected to the first and second input terminals of the inferential circuit included in the second processing unit.
REFERENCES:
patent: 4918528 (1990-04-01), Oohashi
Patent Abstracts of Japan, vol. 17, No. 445 (P-1593) Aug. 16, 1993 & JP-A-05 094 523 (Yokogawa Medical Syst. Ltd.).
Patent Abstracts of Japan, vol. 17, No. 366 (P-1571) Jul. 9, 1993 & JP-A-05 054 190 (Toshiba Corp.).
Electronics Letters, vol. 26, No. 13, Jun. 21, 1990, UK pages 908-910, Shen Q. "Fuzzy Intrafram Smoothing of a Noisy Image".
Mancuso Massimo
Poluzzi Rinaldo
Rizzotto Gianguido
Driscoll David M.
Lee Michael
Morris James H.
SGS--Thomson Microelectronics S.r.l.
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