Method for screening color separations of a lenticular image, computer program product and method for producing a lenticular image on a printing material
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United States of America Patent
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Apr 2, 2013
Grant Date -
Sep 30, 2010
app pub date -
Mar 26, 2010
filing date -
Mar 26, 2009
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Abstract
A method for screening color separations of a lenticular image having a lenticular frequency of lenticular lenses for viewing the image, with a lens width l. An amplitude-modulated halftone image is calculated for each color separation at one screen angle with a rational number tangent and screen frequency. The screen has non-orthogonal screen cells spanned by vectors u, v for a specific color separation. A distance k is defined. Directions of vectors u, v relating to perpendicular direction relative to image strips of the lenticular image are defined for the specific color separation. First (n, m) and second (i, j) pairs of rational numbers are defined, to satisfy a system of equations: n*ux+m*vx=0, n*uy+m*vy=1, i*ux−j*vx=k and i*uy−j*vy=0 for vectors u=(ux, uy) and v=(vx, vy) spanning screen cells. A computer program product is also provided.
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