US Patent No: 4,979,042

Number of patents in Portfolio can not be more than 2000

Apparatus for correcting shading effects in video images

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Abstract

This invention is directed to reducing the size of the memory required to store correction information, by defining the two-dimensional non-uniformity characteristics in terms of two functions that are orthogonal. The orthogonal correction functions are stored in separate memories. During a scan, a pixel counter addresses the X memory while a line counter addresses the Y memory. The correction factors thus obtained are applied sequentially to correct the pixel data value at the current X and Y coordinates.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
EASTMAN KODAK COMPANYROCHESTER, NY16255

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Vogel, Richard M Pittsford, NY 19 491

Cited Art

Patent Info (Count) # Cites Year
 
KABUSHIKI KAISHA TOSHIBA (2)
4,731,652 Shading correction signal generating device for a television camera apparatus 7 1987
2005/0169,530 Obstacle detection device and method therefor 2005
 
RCA LICENSING CORPORATION, TWO INDEPENDENCE WAY, PRINCETON, NJ 08540, A CORP. OF DE (2)
4,396,938 Controlled ram signal processor 16 1981
4,698,685 Apparatus and method for correcting CCD pixel nonuniformities 16 1986
 
BALL CORPORATION (1)
4,343,021 Image sensor sensitivity variation compensator 32 1981
 
EASTMAN KODAK COMPANY (1)
4,392,157 Pattern noise reduction method and apparatus for solid state image sensors 25 1980
 
FOSECO INTERNATIONAL LIMITED (1)
4,694,884 Molten metal casting and feeder sleeves for use therein 4 1986
 
FUJI XEROX CO., LTD. (1)
4,633,314 Shading correction device 16 1983
 
XEROX CORPORATION (1)
4,216,503 Signal restoration and gain control for image viewing devices 62 1979

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
CANON KABUSHIKI KAISHA (3)
6,707,955 Image sensing device, image processing apparatus and method, and memory medium 6 2000
6,963,674 Image sensing device, image processing apparatus and method, and memory medium 4 2004
7,471,808 Image sensing device, image processing apparatus and method, and memory medium 0 2005
 
LOGITECH EUROPE S.A. (3)
6,833,862 Image sensor based vignetting correction 26 1999
7,009,644 Dynamic anomalous pixel detection and correction 28 1999
6,995,794 Video camera with major functions implemented in host software 14 2001
 
ASML NETHERLANDS B.V. (1)
7,388,652 Wave front sensor with grey filter and lithographic apparatus comprising same 0 2006
 
EASTMAN KODAK COMPANY (1)
5,086,343 Method and apparatus for compensating for sensitivity variations in the output of a solid state image sensor 17 1990
 
FUJIFILM CORPORATION (1)
5,784,100 Apparatus and method for performing shading correction by multiplying a differential shading correction factor and input image data 15 1995
 
GYRUS ACMI, INC. (1)
7,453,490 Correction of image signals characteristic of non-uniform images in an endoscopic imaging system 4 2003
 
INTELLECTUAL VENTURES FUND 83 LLC (1)
6,670,988 Method for compensating digital images for light falloff and an apparatus therefor 6 1999
 
JPMORGAN CHASE BANK, N.A. (1)
6,100,920 Video signal compensator for compensating differential picture brightness of an optical image due to uneven illumination and method 7 1999
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (1)
7,236,304 Imaging Device 4 2004
 
NORITSU KOKI CO., LTD. (1)
7,268,917 Image correction processing method and apparatus for correcting image data obtained from original image affected by peripheral light-off 11 2003