Digital special pantograph

Details Digital special pantograph Digital special pantograph

1997-10-20

2000-08-08

Couso, Yon J.

Image analysis

Image transformation or preprocessing

Changing the image coordinates

382100, G06K 932

Patent

active

061012939

ABSTRACT:
A paper document, such as a business form, is printed with a pantograph that is obtained from a pattern on a negative that is substantially incapable of construction by repeating geometric or organic shapes. A positive of the pattern is scanned to create a high resolution digital image in a computer, the high resolution image is interpolated to a low resolution digital image, the image is stored in the computer, for example as full size. Alternatively a rectangular tile that can be repeated substantially seamlessly is created and using the rectangular tile as a pattern an electronic document of desired size is created by manipulating and repeating the rectangular tile pattern. At least two different density versions of the low resolution digital image are preferably produced and stored.

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patent: 4575805 (1986-03-01), Moermann et al.
patent: 4953485 (1990-09-01), Brower et al.
patent: 5142616 (1992-08-01), Kellas et al.
patent: 5245328 (1993-09-01), Garrett
patent: 5552894 (1996-09-01), Aiba
patent: 5559905 (1996-09-01), Greggain et al.
patent: 5621826 (1997-04-01), Katayama et al.
patent: 5742708 (1998-04-01), Yeh et al.

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