Manufacturing of a security document
A method for manufacturing a security document including a security pattern generation method includes the steps of selecting a bounding region, an image object, and a raster image or a function; cutting the image object into image object partitions; and repeating the image object as a pattern, preferably a lattice pattern, in the bounding region wherein each of the image object partitions of an image object is transformed depending on the position area of the image object in the lattice pattern and the rank of the image object partition.
1. A variable repeat pattern generated from a raster image by a raster image processor, the variable repeat pattern comprising:
a plurality of image objects each including a plurality of segments; wherein
at least one of the plurality of segments is translated according to a gray value or an averaged gray value determined from pixels at a position area in the variable repeat pattern relative to the raster image;
the plurality of image objects are arranged in a lattice pattern;
the lattice pattern is selected from the group consisting of a rectangular lattice, a parallelogrammic lattice, an equilateral triangular lattice, a rhombic lattice, a square lattice, and a hexagonal lattice;
the variable repeat pattern is rendered from a document including the raster image by the raster image processor in a prepress workflow system; and
the pattern is for printing on an offset press, a toner-based printer, or an inkjet printer.
2. The variable repeat pattern according to claim 1 , wherein the at least one of the plurality of segments is scaled according to the gray value or the averaged gray value.
3. The variable repeat pattern according to claim 1 , wherein the at least one of the plurality of segments is rotated according to the gray value or the averaged gray value.
4. The variable repeat pattern according to claim 1 , wherein the plurality of image objects are triangular, quadratic, rectangular, heptagonal, pentagonal, oval, rhombus, octagonal, circular, oval, regular polygonal, or elliptical shaped.
5. The variable repeat pattern according to claim 1 , wherein the raster image processor includes one or more graphic processing units that render the variable repeat pattern.
6. The variable repeat pattern according to claim 1 , wherein the document is defined in a page description format.
7. The variable repeat pattern according to claim 6 , wherein the page description format is Portable Document Format.
8. The variable repeat pattern according to claim 2 , wherein the plurality of image objects are triangular, quadratic, rectangular, heptagonal, pentagonal, oval, rhombus, octagonal, circular, oval, regular polygonal, or elliptical shaped.
9. A variable repeat pattern generated from a raster image by a raster image processor, the variable repeat pattern comprising:
a plurality of image objects each including a plurality of segments; wherein
at least one of the plurality of segments is translated according to a gray value or an averaged gray value determined from pixels at a position area in the variable repeat pattern relative to the raster image;
the plurality of image objects are arranged in a blue noise pattern;
the variable repeat pattern is rendered from a document including the raster image by a raster image processor; and
the pattern is for printing on an offset press, a toner-based printer, or an inkjet printer.
10. The variable repeat pattern according to claim 9 , wherein the at least one of the plurality of segments is scaled according to the gray value or the averaged gray value.
11. The variable repeat pattern according to claim 9 , wherein the at least one of the plurality of segments is rotated according to the gray value or the averaged gray value.
12. The variable repeat pattern according to claim 9 , wherein the plurality of image objects are triangular, quadratic, rectangular, heptagonal, pentagonal, oval, rhombus, octagonal, circular, oval, regular polygonal, or elliptical shaped.