Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1996-05-28
1998-08-25
Coles, Edward L.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358454, 358533, 382260, 382262, G06K 940, H04N 140
Patent
active
057988463
ABSTRACT:
An image processing arrangement is described that minimizes moire patterns in scanned halftone images of a scanned image while maintaining the resolution of the scanned image. The arrangement includes a filtering processor that has a modified median filter with a specially shaped (e.g., cross-shaped) filter window. The filter window allows the modified median filter to preserve scanned text images of the scanned image when processing the scanned halftone images to minimize the moire patterns. In addition, the filtering processor determines if an image pixel of the scanned image appears to belong to scanned continuous tone images of the scanned image prior to processing the image pixel. The filtering processor does not process that image pixel and the pixel value of that image pixel is left unchanged if the image pixel appears to belong to the scanned continuous tone images.
REFERENCES:
patent: 4463375 (1984-07-01), Macouski
patent: 4513440 (1985-04-01), Delman
patent: 4613896 (1986-09-01), Takita
patent: 4682230 (1987-07-01), Perlman et al.
patent: 4720745 (1988-01-01), DeForest et al.
patent: 4736439 (1988-04-01), May
patent: 4786975 (1988-11-01), Postl
patent: 4812915 (1989-03-01), Tada
patent: 4893195 (1990-01-01), Tada
patent: 4926267 (1990-05-01), Shu et al.
patent: 4928258 (1990-05-01), May
patent: 4939590 (1990-07-01), Tada
patent: 4942480 (1990-07-01), Shu
patent: 4965599 (1990-10-01), Roddy et al.
patent: 5065255 (1991-11-01), Kimura et al.
patent: 5239390 (1993-08-01), Tai
patent: 5265042 (1993-11-01), Smith, Jr.
patent: 5313309 (1994-05-01), Tai et al.
patent: 5333211 (1994-07-01), Kanda et al.
patent: 5384865 (1995-01-01), Loveridge
patent: 5408337 (1995-04-01), Kanda
patent: 5408338 (1995-04-01), Kolke
patent: 5408339 (1995-04-01), Sasaki et al.
patent: 5426670 (1995-06-01), Leppanen et al.
patent: 5528704 (1996-06-01), Parker et al.
patent: 5579445 (1996-11-01), Loce et al.
F. W.Campbell and J.J. Kulikowski, "Orientational Selectivity of the Human Visual System" J. Physical, (1966), 187 pp. 437-445.
Yong-Hwan Lee and Sawasd Tantaratana, "Decision-Based Order Statistic Filters", IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. 38, No.3, Mar. 1990, pp. 406-420.
Ruikang Yang, Lin Yin, Moncef Gabbouj, Jaakko Astola, and Yrjo Neuvo, "Optimal Weighted Median Filtering Under Structural Constraints", IEEE Transactions on Signal Processing, vol. 43, No. 3, Mar., 1995, pp. 591-604.
Bing Zeng, Optimal Median Type Filtering Under Structural Constraints, IEE Transactions on Image Processing, vol. 4, No. 7, Jul., 1995, pp. 921-931.
Neal C. Gallagher, Jr. and Gary L. Wise, "A Theoretical Analysis of the Properties of median Filters", IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. ASSP-29, No. 6, Dec., 1981, pp. 11361141.
Moncef Gabbouj and Edward J. Coyle, "Minimum Mean Absolute Error Stack Filtering with Structural Constraints and Goals", IEEE Transactions on Acoustics, Speech, and Signal Processing, vol. 38, No. 6, Jun., 1990, pp. 955-968.
Ping Wah Wong "Inverse Halftoning and kernel Estimation for Error Diffusion", IEEE Transactions on Image Processing, vol. 4, No. 4, Apr., 1995, pp. 486-498.
Joseph Shou-Pyng Shu and Robert Springer, "Moire Factors and Visibility in Scanned and Printed Halftone Images", Optical Engineering, Jul., 1989, vol. 28, No. 7, pp. 805-812.
Stuart C. HInds, James L. Fisher, and Donald P. D'Amato, "A Document Skew Detection Method Using Run-Length encoding and the Hough Transform", IEE, 1990, pp. 464-468.
Jiang Liu, Chung-Mong Lee and Ren-Ben Shu, "An Efficient Method for the Skew Normalization of a Document Image", IEE, 1992, pp. 122125.
Naoki Ozawa and Kenji Takahashi, "A Corrective coefficient Multipling (CCM) Method for Chrominance Moire Reduction in single-Chip Color Video Cameras", IEE Transaction on Electron Device, vol. 38, No. 5, May, 1991, pp.-12171225.
Arden Steinback and Kwan Y. Wong, "Moire Patterns in Scanned Halftone Pictures", Optical Society of America, vol. 72, No. 9, Sep., 1982, pp. 1190-1198.
Coles Edward L.
Hewlett--Packard Company
Li Thomas X.
Nguyen Madeleine A-V
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