Published January 1, 2017
| Version v1
Conference paper
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Quasi-Flat Zones for Angular Data Simplification
- 1. Gebze Tech Univ, Inst Informat Technol, TR-41400 Gebze, Turkey
- 2. Univ Bretagne Sud, IRISA, UMR 6074, F-56000 Vannes, France
Description
Quasi-flat zones are based on the constrained connectivity paradigm and they have proved to be effective tools in the context of image simplification and super-pixel creation. When stacked, they form successive levels of the alpha- or omega-tree powerful representations. In this paper we elaborate on their extension to angular data, whose periodicity prevents the direct application of grayscale quasi-flat zone definitions. Specifically we study two approaches in this regard, respectively based on reference angles and angular distance computations. The proposed methods are tested both qualitatively and quantitatively on a variety of angular data, such as hue images, texture orientation fields and optical flow images. The results indicate that quasi-flat zones constitute an effective means of simplifying angular data, and support future work on angular tree-based representations.
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