Method and system for determining positions on a document
First Claim
1. An information carrier, on which a position can be measured for a measuring point using a mobile reading device, wherein:
- the information carrier comprises a surface to which a visible primary information has been applied, in particular in the manner of sheet music, a book or a map,at least one machine-readable two-dimensional pattern has been printed on the surface, said two-dimensional pattern coding a position information, wherein by using said information in an image analysis method, and by local sampling of parts of the two-dimensional pattern, the position of measuring point may be determinedthe two-dimensional pattern coding the position information is transparent in such a way that the primary information on the surface will remain visible, andthe two-dimensional pattern comprises two patterns realized as two crossed, overlapping but separately recognizable one dimensional lattices, Lattice_x made of horizontal code stripes and Lattice_y made of vertical code stripes, wherein the materials for Lattice_y and Lattice_x overlap in certain areas, but wherein said materials differ in their respective physical properties so as to permit separate readout and decoding of the two lattices at any point on the surface.
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Accused Products
Abstract
The invention comprises an information carrier on which the position of a measuring point (37, 41) may be determined using a mobile readout device, as well as an attendant method of determining a position wherein the information carrier features a surface onto which a visible primary information has been applied, in the manner of a book or a geographic map, wherein at least one machine-readable pattern has been printed on the surface, said pattern coding a position information, which upon bringing to bear methods of image analysis and of local sampling of parts (36, 40) of the surface, will allow a determination of position for a measurement point (37, 41) and wherein the pattern coding the position information is transparent in such a way that the primary information on the surface remains visible.
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Citations
22 Claims
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1. An information carrier, on which a position can be measured for a measuring point using a mobile reading device, wherein:
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the information carrier comprises a surface to which a visible primary information has been applied, in particular in the manner of sheet music, a book or a map, at least one machine-readable two-dimensional pattern has been printed on the surface, said two-dimensional pattern coding a position information, wherein by using said information in an image analysis method, and by local sampling of parts of the two-dimensional pattern, the position of measuring point may be determined the two-dimensional pattern coding the position information is transparent in such a way that the primary information on the surface will remain visible, and the two-dimensional pattern comprises two patterns realized as two crossed, overlapping but separately recognizable one dimensional lattices, Lattice_x made of horizontal code stripes and Lattice_y made of vertical code stripes, wherein the materials for Lattice_y and Lattice_x overlap in certain areas, but wherein said materials differ in their respective physical properties so as to permit separate readout and decoding of the two lattices at any point on the surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A document having visible information and encoded positional information, said document comprising:
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a) a document surface; b) visible information applied on the document surface, said visible information being visibly discernable by the naked human eye; c) a first pattern applied on the document surface coincident with the visible information applied on the document surface, said first pattern being transparent to the naked human eye while not disturbing the discernability by the naked human eye of the visible information applied on the document surface, said first pattern comprising a plurality of parallel code stripes having encoded therein positional information on the document surface relative a first coordinate axis, said first pattern being applied with a varying saturation such that said parallel code stripes have different saturations; and d) a second pattern applied on the document surface coincident with the visible information applied on the document surface, said second pattern being transparent to the naked human eye while not disturbing the discernability by the naked human eye of the visible information applied on the document surface, said second pattern comprising a plurality of parallel code stripes having encoded therein positional information on the document surface relative a second coordinate axis, said second pattern being applied with a varying saturation such that said parallel code stripes have different saturations, the second coordinate axis crossing the first coordinate axis such that the first and second patterns create a lattice. - View Dependent Claims (15, 16, 17, 18)
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19. A method for determining a position on a document, the document comprising visible information and transparent markings encoding positional information corresponding to a first coordinate axis and a second coordinate axis, the method comprising the steps of:
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a) sampling a plurality of physical parameter points on the document, each physical parameter point having one of nine physical parameter values such that the sampled points define a pattern, the nine parameter values respectively indicating; i) a transparent marking at a first saturation corresponding to the first coordinate axis, ii) a transparent marking at a second saturation corresponding to the first coordinate axis, iii) a transparent marking at a first saturation corresponding to the second coordinate axis, iv) a transparent marking at a second saturation corresponding to the second coordinate axis, v) a transparent marking at the first saturation corresponding to the first coordinate axis and a transparent marking at the first saturation corresponding to the second coordinate axis, vi) a transparent marking at the second saturation corresponding to the first coordinate axis and a transparent marking at the first saturation corresponding to the second coordinate axis, vii) a transparent marking at the first saturation corresponding to the first coordinate axis and a transparent marking at the second saturation corresponding to the second coordinate axis, viii) a transparent marking at the second saturation corresponding to the first coordinate axis and a transparent marking at the second saturation corresponding to the second coordinate axis, ix) no transparent marking; and b) calculating a position on the document based on the sampled physical parameter points. - View Dependent Claims (20, 21, 22)
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Specification