| Download | - View final version: Automatic grid finding in calibration patterns using Delaunay triangulation (PDF, 859 KiB)
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| DOI | Resolve DOI: https://doi.org/10.4224/8913090 |
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| Author | Search for: Shu, Chang; Search for: Brunton, Alan; Search for: Fiala, Mark |
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| Format | Text, Technical Report |
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| Physical description | 26 p. |
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| Abstract | This paper describes a technique for finding regular grids in the images of calibration patterns, a crucial step in calibrating cameras. Corner features located by a corner detector are connected using Delaunay triangulation. Pairs of neighboring triangles are combined into quadrilaterals, which are then topologically filtered and ordered. We introduce a unique data structure for representing both triangular and quadrilateral meshes. This mesh structure allows us to exploit the strong topological constraints in a regular grid. Experiments show that the method is able to handle images with severe radial distortions. Implemented on a conventional desktop, grid matching can be done in real time. The method is also applicable to marker detections for augmented reality and robot navigation. |
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| Publication date | 2003-08 |
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| Publisher | National Research Council Canada |
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| Series | |
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| Language | English |
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| NRC number | NRCC 46497 |
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| NPARC number | 8913090 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | d0651d6a-f403-4890-a6ed-391be4169d1c |
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| Record created | 2009-04-22 |
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| Record modified | 2025-11-03 |
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