Copy restrictive color-reversal documents

Details Copy restrictive color-reversal documents Copy restrictive color-reversal documents

1997-04-11

1998-06-30

Howell, Daniel W.

Printed matter

Having revealable concealed information, fraud preventer or...

Having specific color

283 93, 283902, 380 51, 380 54, B42D 1500

Patent

active

057722501

ABSTRACT:
A media for restricting the copying of a color-reversal document utilizing one or more microdots that are embedded in the color-reversal document for providing a non-visual, but machine detectable signal. By detecting the presence of one or more microdots in the color-reversal document, a copy machine is controllably prevented from copying the color-reversal document.

REFERENCES:
patent: 3784289 (1974-01-01), Wicker
patent: 4307899 (1981-12-01), Hoppe
patent: 5018767 (1991-05-01), Wicker
patent: 5149140 (1992-09-01), Mowry, J. et al.
patent: 5193853 (1993-03-01), Wicker
patent: 5231663 (1993-07-01), Earl et al.
patent: 5241166 (1993-08-01), Chandler
patent: 5297815 (1994-03-01), Anderson et al.
patent: 5375886 (1994-12-01), Tsuchiya
patent: 5379093 (1995-01-01), Hashimoto et al.
patent: 5390003 (1995-02-01), Yamaguchi et al.
patent: 5412718 (1995-05-01), Narasimhalu et al.
patent: 5444779 (1995-08-01), Daniele
patent: 5513418 (1996-05-01), Batterman et al.
patent: 5563401 (1996-10-01), Lemelson
E. N. Willmer and W.D. Wright, "Colour Sensitivity of the Fovea Centralis," Jul. 28, 1945, pp. 119-121.
R.W.G. Hunt, "The Reproduction of Colour in Photography, Printing & Television," 1987, pp. 12-13, and 118-119.
William K. Pratt, "Digital Image Processing," 1991, pp. 613-614.
Joseph W. Goodman, "Introduction to Fourier Optics," 1968, pp. 176-183.
J. Serra, "Image Analysis and Mathematical Morphology," 1982, pp. 424-445.
William H. Press, Saul A. Teukolsky, William, T. Vetterling, and Brian P. Flannery, "Numerical Recipes in C, The Art of Scientific Computing Second Edition," 1992, pp. 525-531.
Heinrich Niemann, "Pattern Analysis and Understanding," 1990, p. 188.
"Research Disclosure" Number 365, Sep. 1994, pp. 501-539.
D. M. Zwick, "Critical Densities for Graininess in Reflection Prints," from Journal of Applied Photographic Engineering, vol. 8, No. 2, Apr. 1982, pp. 71-76.

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