US 5,488,451 AGranted

Method of producing multidimensional lithographic separations free of moire interference

AssigneeNational Graphics, Inc.

InventorTimothy P. Goggins

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Abstract

Multidimensional lithographs which impart the illusions of depth and/or motion to a viewer are prepared by constructing and sequencing a plurality of electronic pages, preferably four or more; rasterizing, compressing and converting each page; interlacing the pages in a desired sequence; outputting the interlaced frames to an imaging device; and producing a lithographic separation from the imaging device. In the rasterization of each frame, nonbinary pixels are created that correspond to the resolution of the line count of the lenticular lens that will ultimately be applied to a print of the lithograph times the number of frames in the lithographic separation. The frames are compressed to an amount equal to the reciprocal of the number of frames from which the lithographic separation is prepared. In the converting step, the nonbinary pixels of the compressed frames are converted to individual color plates of binary pixels. The multidimensional lithographic separations are free of moire and screen interference.

Claims10

Dependent claims

A method of producing a multidimensional lithographic separation void of moire and screen interference, the separation comprising a plurality of segments created from a plurality of electronic frames and from which a multidimensional lithograph can be produced and joined to a lenticular lens of a predetermined line count, the method comprising the steps of:

A. Creating a plurality of electronic frames;
B. Ordering the frames into a desired sequence;
C. Rasterizing each frame at a nonbinary pixel resolution according to the formula
resolution=l times f
in which l is the lenticular line count and f is the number frames in the lithographic separation;
D. Compressing each frame such that each frame is compressed according to the formula
Compression=1/f
in which f is the number of frames in the separation;
E. Converting the nonbinary pixels of the compressed frames to individual color plates of binary pixels;
F. Interlacing the frames in the desired sequence of step (B);
G. Outputting the interlaced frames to an imaging device;
and
H. Producing a lithographic separation from the imaging device of step G.

10 more elements

Dependencies are inferred from the claim text.