Rausch, DominikAssenmacher, IngoKuhlen, TorstenKenny Erleben and Jan Bender and Matthias Teschner2014-02-012014-02-012010978-3-905673-78-4https://doi.org/10.2312/PE/vriphys/vriphys10/115-124We present a comprehensive 3D sketch recognition framework for interaction within Virtual Environments that allows to trigger commands by drawing symbols, which are recognized by a multi-level analysis. It proceeds in three steps: The segmentation partitions each input line into meaningful segments, which are then recognized as a primitive shape, and finally analyzed as a whole sketch by a symbol matching step. The whole framework is configurable over well-defined interfaces, utilizing a fuzzy logic algorithm for primitive shape learning and a textual description language to define compound symbols. It allows an individualized interaction approach that can be used without much training and provides a good balance between abstraction and intuition. We show the real-time applicability of our approach by performance measurements.Categories and Subject Descriptors (according to ACM CCS): Computer Graphics [I.3.6]: Methodology and Techniques-Interaction Techniques Computer Graphics [I.3.7]: Three-Dimensional Graphics and Realism- Virtual Reality; Pattern Recognition [I.5.5]: Implementation-Interactive Systems