Method and apparatus for adaptive color scanning/printing data c

Details Method and apparatus for adaptive color scanning/printing data c Method and apparatus for adaptive color scanning/printing data c

1996-03-08

1998-05-05

Frahm, Eric

Facsimile and static presentation processing

Facsimile

Recording apparatus

358504, 358518, 395 21, H04N 140, H04N 146, G03F 308, G03F 1518

Patent

active

057483299

ABSTRACT:
A method and apparatus for adaptive color scanning/printing data correction to effectively adjust to an arbitrary combination of color image scanning input and printing output devices for reproducing color image at optimized resemblance. An improved back propagation algorithm is employed to reduce the learning error and accelerate the process of learning procedure by increasing the rate of convergence. A method of characteristics extracting functionalization is utilized to urge the successful convergence of the learning procedure of the neural network, and reduce the color discrepancy and accelerate the process of learning convergence. An enhanced grey-scale balancing scheme is also utilized to extract the grey component of a learning sample under a predetermined condition and re fetch again to the neural network for accelerated convergence of the learning behavior. An apparatus for performing the color data correction includes an integrated neural network color processor that utilizes a small number of neural elements to reduce the complexity of the color data processing and computational complication.

REFERENCES:
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patent: 5200816 (1993-04-01), Rose
patent: 5506696 (1996-04-01), Nakano
D.E. Rumelhart, et al. "Learning Internal Representations by Error Propagation", Chapter 8 of Parallel Distributed Processing . . . , Sixth Printing, 1987.
H.R. Kang & P.G. Anderson, "Neural network applications to the color scanner and printer calibrations" from Journal of Electronic Imaging 1(2) Apr. 1992, pp. 125-135.
B. Petschik, "Color Hard Copy--a self-tuning color correction algorithm based on . . . ", SPIE vol. 1458 Printing Technologies for Images, Gray scale, and Color 1991, pp. 108-114.
G. Starkweather, "A Color-Correction Scheme for Color Electronic Printers", Xerox Palo Alto Research Center; vol. 11, Supplement 1986, pp. S67-S72.

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