Document optimized reconstruction of color filter array images

Details Document optimized reconstruction of color filter array images Document optimized reconstruction of color filter array images

2006-07-04

2006-07-04

Bali, Vikkram (Department: 2623)

Image analysis

Color image processing

Color correction

C382S300000

Reexamination Certificate

active

07072508

ABSTRACT:
An electronic camera imaging system records a color filter array (CFA) image. The missing color values of the CFA image are reconstructed using a linear transformation. The coefficients of the linear transformation are estimated in one embodiment by computing an average value over a window of the CFA image by equalizing the mean and the variance of the color channels of the window. In another embodiment, the coefficients of the linear transformation are estimated by fitting a line to a set of the sums of column and rows of color channels of a window of the CFA image.

REFERENCES:
patent: 3971065 (1976-07-01), Bayer
patent: 4176373 (1979-11-01), Dillon et al.
patent: 4630307 (1986-12-01), Cok
patent: 4642678 (1987-02-01), Cok
patent: 4716455 (1987-12-01), Ozawa et al.
patent: 4724395 (1988-02-01), Freeman
patent: 4803548 (1989-02-01), Kirk
patent: 5065229 (1991-11-01), Tsai et al.
patent: 5373322 (1994-12-01), Laroche et al.
patent: 5382976 (1995-01-01), Hibbard
patent: 5506619 (1996-04-01), Adams, Jr. et al.
patent: 5629734 (1997-05-01), Hamilton, Jr. et al.
patent: 5652621 (1997-07-01), Adams, Jr. et al.
patent: 5778106 (1998-07-01), Juenger et al.
patent: 5990950 (1999-11-01), Addison
patent: 6721003 (2004-04-01), Tsuruoka et al.
Eric W. Weisstein, “CRC Concise Encyclopedia of Mathematics” © 1999, CRC Press LLC, pp. 1045-1049.
U.S. Appl. No. 09/427,833 entitled “Background Surface Thresholding”, filed Oct. 26, 1999.
T. Acharyaai, and P.-S. Tsai, “A new block matching Based color interpolation,” inColor Imaging: Device-Independent Color Hard Copy, and Graphic Arts IV, SPIE vol. 3648, p. 60-65, San Jose, 1999.
J. E. Adams Jr., “Interactions between color plane interpolation and other image processing functions in electronic photography”, inCameras and Systems for Electronic Photography and Scientific Imaging, SPIE vol. 2416, pp. 144-151, San Jose, 1995.
E. Chang, S. Cheung, and D. Pan, “Color filter array recovery using a threshold-based variable number of gradients,” inSensors, Cameras, and Applications for Digital Photography, SPIE vol. 3650, pp. 27-28, San Jose, 1999.
G.C. Holst,CCD Arrays, Cameras, and Displays, JCD Publishing. Winter Park, FL, 1996, chapter 3 “CCD ARRAYS”, pp. 42-89 and chapter 10 “SYSTEM MTF”, pp. 233-274.
K.A. Parulski, “Color filters and processing alternatives for one-chip cameras”,IEEE Transactions on Electronic Devices, vol. 32, No. 8, pp. 1381-1389, 1985.
X. Wu, W. Choi, and P. Bao, “Color restoration from digital camera data by pattern matching,” inColor Imaging: Device-Independent Color Hard Copy, and Graphic Arts II, SPIE vol. 3018, pp. 12-17, San Jose, 1997.
C. Dance, L. Fan,Color Reconstruction in Digital Cameras: Optimization for Document Images, International Journal on Document Analysis and Recognition, vol. 7, Issue 2-3, Jul. 2005, pp. 138-146.

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