Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1995-08-31
1997-12-09
Vu, Kim
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358455, 358456, 382254, H04N 140, G06K 940
Patent
active
056966024
ABSTRACT:
A dispersed-dot stochastic dither array is provided for rendering halftone images having excellent visual quality and are created by a minimum density variance method. The minimum density variance method considers the statistical distribution of the pixels in the image, and is unrelated to previous techniques based on either spatial frequencies or spatial distances, such as the blue noise mask and the void and cluster algorithm. By minimizing the variance in the number of dots within each local region of the image, a smooth and dispersed distribution of dots may be obtained. The method of the present invention also offers the flexibility to accommodate particular design considerations, through the selection of the size and shape of the image regions, the weighting of the cost function, and the option of guiding the selection of dots with "target" dot profile images.
REFERENCES:
patent: 5111310 (1992-05-01), Parker
patent: 5214517 (1993-05-01), Sullivan et al.
patent: 5317418 (1994-05-01), Lin
M. Analoui and J. P. Allebach, "Model Based Halftoning Using Direct Binary Search", Proc. of the SPIE, vol. 1666, pp. 96-108, Feb. 1992.
T. N. Pappas and D. L. Neuhoff, "Model-Based Halftoning", Proc. of the SPIE, vol. 1453, pp. 244-255, Feb. 1991.
T. N. Pappas and D. L. Neuhoff, "Least-Squares Model-Based Halftoning", Proc. of the SPIE, vol. 1666, pp. 165-176, Feb. 1992.
J. Sullivan, L. Ray and R. Miller, "Design of Minimum Visual Modulation Halftone Patterns", IEEE Transactions on Systems, Man, and Cybernetics, vol. 21, No. 1, pp. 33-38, Jan./Feb. 1991.
R. A. Ulichney, "The void-and-cluster method for dither array generation", Proc. of the SPIE, vol. 1913, pp. 332-343, Sep. 1993.
M. Yao and K. J. Parker, "Modified Approach to the Construction of a Blue Noise Mask", Journal of Electronic Imaging, vol. 3, No. 1, pp. 92-97, Jan. 1994.
Cooper Brian Edward
Knight Thomas Anthony
Love Shaun Timothy
Gribbell Frederick H.
Harris Tia M.
Lexmark International Inc.
Vu Kim
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