Reconstruction of virtual raster
First Claim
1. A method for reconstruction of a virtual raster based on objects in a digital image, the objects at least partially reproducing marks on a base, and each mark being associated with a respective point of intersection of raster lines belonging to the virtual raster, said method comprising:
- matching sets of objects against a cell unit, which corresponds to a recurring known basic element of said raster;
when a set corresponds with the cell unit, identifying the objects in the set as approved; and
reconstructing the virtual raster on the basis of the mutual arrangement of the approved objects.
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Accused Products
Abstract
A method aims at identifying, starting from objects in a digital image, a virtual raster included in a coding pattern. The objects in the image at least partially reproduce marks on a base, each mark being associated with a respective point of intersection of raster lines belonging to the virtual raster. The method comprises the steps of matching sets of objects against a cell unit, which corresponds to a recurring known basic element of said raster; when a set corresponds with the cell unit, identifying the objects in the set as approved; and reconstructing the virtual raster on the basis of the mutual arrangement of the approved objects. A computer program, a storage medium and a device for position determination are also described.
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Citations
22 Claims
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1. A method for reconstruction of a virtual raster based on objects in a digital image, the objects at least partially reproducing marks on a base, and each mark being associated with a respective point of intersection of raster lines belonging to the virtual raster, said method comprising:
- matching sets of objects against a cell unit, which corresponds to a recurring known basic element of said raster;
when a set corresponds with the cell unit, identifying the objects in the set as approved; and
reconstructing the virtual raster on the basis of the mutual arrangement of the approved objects. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
- matching sets of objects against a cell unit, which corresponds to a recurring known basic element of said raster;
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22. A device for position-decoding which computes a position on the basis of a digital representation of a partial area of a position-coding pattern, said position-coding pattern comprising marks which are each associated with a respective point of intersection of raster lines belonging to a virtual raster, said digital representation comprising objects which at least partially reproduce said marks;
- wherein said device comprises;
means for matching sets of said objects against a cell unit which corresponds to a recurring known basic element of said raster;
means for identifying, when a set corresponds with said cell unit, the objects in said set as approved;
means for reconstructing the virtual raster on the basis of the mutual arrangement of the thus-approved objects; and
means for computing said position on the basis of said virtual raster and said objects in said digital representation.
- wherein said device comprises;
Specification