Polygonal Meshes of Highly Noisy Images based on a New Symmetric Thinning Algorithm with Theoretical Guarantees Topics: Assistive Computer Vision; Early and Biologically-Inspired Vision; Features Extraction; Shape Representation and Matching; Visual Attention and Image Saliency In Proceedings of the 15th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - Volume 4: VISAPP, 137-146, 2020 , Valletta, Malta