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- W2191607965 abstract "We consider the problem of estimating the curvature profile along the boundaries of digital objects in segmented black-and-white images. We start with the curvature estimator proposed by Roussillon et al., which is based on the calculation of emph{maximal digital circular arcs} (MDCA). We extend this estimator to the $lambda$-MDCA curvature estimator that considers several MDCAs for each boundary pixel and is therefore smoother than the classical MDCA curvature estimator. We prove an explicit order of convergence result for convex subsets in $mathbb{R}^2$ with positive, continuous curvature profile. In addition, we evaluate the curvature estimator on various objects with known curvature profile. We show that the observed order of convergence is close to the theoretical limit of $mathcal{O}(h^{frac13})$. Furthermore, we establish that the $lambda$-MDCA curvature estimator outperforms the MDCA curvature estimator, especially in the neighborhood of corners." @default.
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- W2191607965 date "2015-09-29" @default.
- W2191607965 modified "2023-09-26" @default.
- W2191607965 title "Multigrid convergence for the MDCA-curvature estimator" @default.
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