Image analysis – Image enhancement or restoration – Image filter
Patent
1995-02-28
1998-05-26
Bost, Dwayne
Image analysis
Image enhancement or restoration
Image filter
382254, 358447, 364606, G06K 940, G06T 500
Patent
active
057579776
ABSTRACT:
A filter achieving noise reduction and digital signal image edge enhancement includes two noise reduction circuits designed to enhance an image edge. The noise reduction circuits comprise both comparison units, which receive separate digital signals of an image and an inferential circuit connected to said comparison elements. Each inferential circuit uses a fuzzy logic unit designed to define activation levels based on signals generated by the comparison elements. The filter also includes a noise detection circuit and an image edge detection circuit both connected to the noise reduction circuit and designed to perform operations in accordance with fuzzy logic rules on the basis of the activation levels defined in the inferential circuits. The filter also includes a noise reduction circuit connected to the noise detection circuit and is designed to filter the digital image signals on the basis of the operations performed by the noise detection circuit. The filter additionally includes an image edge enhancement circuit connected to the noise reduction circuit and to the image edge detection circuit and is designed to perform on filtered digital image signals image edge enhancement on the basis of the operations performed by the image edge detection circuit.
REFERENCES:
patent: 4402006 (1983-08-01), Karlock
patent: 4953027 (1990-08-01), Tong
patent: 4972256 (1990-11-01), Hirosawa
patent: 5023919 (1991-06-01), Wataya
patent: 5032909 (1991-07-01), Sato
patent: 5047856 (1991-09-01), Miller
patent: 5231677 (1993-07-01), Mita
patent: 5245445 (1993-09-01), Fujisawa
patent: 5339365 (1994-08-01), Kawai
patent: 5371695 (1994-12-01), Baraszu
patent: 5414473 (1995-05-01), Hong
patent: 5519451 (1996-05-01), Clatanoff
patent: 5576548 (1996-11-01), Clarke
patent: 5581305 (1996-12-01), Min
patent: 5621474 (1997-04-01), Mancuso
Zhao et al., "An Effective Fuzzy Logic Approach to Image Enhancement," Proceedings of the SPIE, Visual Communications and Image Processing '93 2094(1): 244-251, Cambridge, Mass., Nov. 8-11, 1993.
Tao et al., "A Fuzzy If-Then Approach to Edge Detection," IEEE, 1356-1359, Jul. 1993.
Russo and Ramponi, "Fuzzy Operator for Sharpening of Noisy Images, " Electronics Letters 28(18):1715-1717, 1992.
Russo and Ramponi, "Working On Image Data Using Fuzzy Rules," Signal Processing VI: Theories and Applications, 1413-1416, Elsevier Science Publishers B.V., 1992.
Shaomin Peng, et al., "Fuzzy Filtering for Mixed Noise Removal During Image Processing," IEEE 0-7803-1896-X/94, 1994.
Ching-Yu Tyan, et al., "Image Processing--Enhancement, Filtering and Edge Detection Using the Fuzzy Logic Approach," IEEE 0-7803-0614-Jul. 1993.
Kaoru Arakawa, et al., "A Non-linear Digital Filter Using Fuzzy Chiskry," IEEE 0-7803-0532-Sep. 1992.
Mancuso Massimo
Poluzzi Rinaldo
Rizzotto Gianguido
Bost Dwayne
Carlson David V.
Johnson Brian L.
SGS--Thomson Microelectronics S.r.l.
LandOfFree
Fuzzy logic filter for reducing noise and sharpening edges of di does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fuzzy logic filter for reducing noise and sharpening edges of di, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fuzzy logic filter for reducing noise and sharpening edges of di will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1973796