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Between shapes, using the Hausdorff distance

Published: 01 January 2022 Publication History

Abstract

Given two shapes A and B in the plane with Hausdorff distance 1, is there a shape S with Hausdorff distance 1/2 to and from A and B? The answer is always yes, and depending on convexity of A and/or B, S may be convex, connected, or disconnected. We show that our result can be generalized to give an interpolated shape between A and B for any interpolation variable α between 0 and 1, and prove that the resulting morph has a bounded rate of change with respect to α. Finally, we explore a generalization of the concept of a Hausdorff middle to more than two input sets. We show how to approximate or compute this middle shape, and that the properties relating to the connectedness of the Hausdorff middle extend from the case with two input sets. We also give bounds on the Hausdorff distance between the middle set and the input.

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  • (2023)Whole Tumor Area Estimation in Incremental Brain MRI Using Dilation and Erosion-Based Binary MorphingBioinformatics and Biomedical Engineering10.1007/978-3-031-34953-9_10(131-142)Online publication date: 12-Jul-2023

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      cover image Computational Geometry: Theory and Applications
      Computational Geometry: Theory and Applications  Volume 100, Issue C
      Jan 2022
      152 pages

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      Elsevier Science Publishers B. V.

      Netherlands

      Publication History

      Published: 01 January 2022

      Author Tags

      1. Computational geometry
      2. Hausdorff distance
      3. Shape interpolation
      4. Morphing

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      • (2023)Whole Tumor Area Estimation in Incremental Brain MRI Using Dilation and Erosion-Based Binary MorphingBioinformatics and Biomedical Engineering10.1007/978-3-031-34953-9_10(131-142)Online publication date: 12-Jul-2023

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