Segmentation of 3D Point Clouds using a New Spectral Clustering Algorithm Without a-priori Knowledge Topics: Color and Texture Analyses; Features Extraction; Segmentation and Grouping In Proceedings of the 13th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - Volume 4 VISAPP: VISAPP, 315-322, 2018 , Funchal, Madeira, Portugal