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The recognition of geometric shapes formally described by mathematical models has a long tradition in pattern recognition. Similarly, the detection of ellipses has often been solved in the past based on a large number of complex parameters. Ellipses detection from real-world images with a fast and...
The shapes resulting on the user screen are not perfectly circular due to the nonlinearity of the mapping function used and an inaccurate calibration process. For simplicity, in the following analysis, these shapes are approximated by circles with radii Ri(r), (i = 1, …, 9, corresponding to...