Image analysis – Image enhancement or restoration – Image filter
Reexamination Certificate
2008-05-13
2008-05-13
Kassa, Yosef (Department: 2624)
Image analysis
Image enhancement or restoration
Image filter
C382S260000, C382S263000, C382S264000, C382S275000, C358S003260, C358S003270, C358S463000
Reexamination Certificate
active
07373013
ABSTRACT:
Spatial noise is reduced in an image having a plurality of pixels by detecting object boundaries and unstructured areas in the image and applying 3-tap high pass filters to each pixel in the image in at least four, but less than eight directions to determine the best direction for local low pass filtering. Low pass filtering is applied only along object boundaries and unstructured areas within the image so as to minimize the tendency to blur image edges. Using only four high pass filters to locate horizontal, vertical and diagonal image edges passing through the center of a 3×3 pixel array provides good results.
REFERENCES:
patent: 4463381 (1984-07-01), Powell et al.
patent: 5025404 (1991-06-01), Janssen et al.
patent: 5032903 (1991-07-01), Suzuki et al.
patent: 5434902 (1995-07-01), Bruijns
patent: 5469226 (1995-11-01), David et al.
patent: 5537157 (1996-07-01), Washino et al.
patent: 5537159 (1996-07-01), Suematsu et al.
patent: 5600380 (1997-02-01), Patel et al.
patent: 5696842 (1997-12-01), Shirasawa et al.
patent: 5844627 (1998-12-01), May et al.
patent: 5867606 (1999-02-01), Tretter
patent: 5930411 (1999-07-01), Kojima et al.
patent: 5974171 (1999-10-01), Hayashi et al.
patent: 5974193 (1999-10-01), Baudouin
patent: 6005626 (1999-12-01), Ding
patent: 6049354 (2000-04-01), Sekine et al.
patent: 6061100 (2000-05-01), Ward et al.
patent: 6067125 (2000-05-01), May
patent: 6069984 (2000-05-01), Sadler et al.
patent: 6108455 (2000-08-01), Mancuso
patent: 6122016 (2000-09-01), De Haan et al.
patent: 6229520 (2001-05-01), Clatanoff et al.
patent: 6229578 (2001-05-01), Acharya et al.
patent: 6285798 (2001-09-01), Lee
patent: 6295382 (2001-09-01), Karanovic
patent: 6335990 (2002-01-01), Chen et al.
patent: 6411305 (2002-06-01), Chui
patent: 6614944 (2003-09-01), Levantovsky
patent: 6657676 (2003-12-01), Borneo et al.
patent: 6671340 (2003-12-01), Kroeger et al.
patent: 6697660 (2004-02-01), Robinson
patent: 6763129 (2004-07-01), Honda et al.
patent: 6847737 (2005-01-01), Kouri et al.
patent: 6965695 (2005-11-01), Yamakawa
patent: 6993191 (2006-01-01), Petrescu
patent: 7110602 (2006-09-01), Krause
patent: 7167602 (2007-01-01), Yamashita et al.
Jostschulte, K., et al, “Perception Adaptive Temporal TV-Noise Reduction Using Contour Preserving Prefilter Techniques,” IEEE Transactions on Consumer Electronics, vol. 44, No. 3, 1998, pp. 1091-1096.
Lee, J.S., “Digital Image Enhancement and Noise Filtering by Use of Local Statistics,” IEEE Translations on Pattern Analysis and Machine Intelligence, vol. PAMI-2, No. 2, Mar. 1980, pp. 165-168.
Lee, J.S., “Refined Filtering of Image Noise Using Local Statistics,” Computer Graphics & Image Processing, vol. 15, No. 4, Apr. 1981, pp. 380-389.
Kuan, D. T., et al., “Adaptive Noise Smoothing Filter for Images with Signal-Dependent Noise,” IEEE Transactions on Pattern Analysis and Machine Intelligence, vol. PAMI-7, No. 2, Mar. 1985, pp. 165-177.
Driscoll Benjamin D.
General Instrument Corporation
Kassa Yosef
LandOfFree
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