Multi-Forest Classification and Layered Exhaustive Search using a Fully Hierarchical Hand Posture/Gesture Database Topics: Device Calibration, Characterization and Modeling; Event and Human Activity Recognition; Human and Computer Interaction; Image-Based Modeling and 3D Reconstruction; Machine Learning Technologies for Vision; Shape Representation and Matching In Proceedings of the 13th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - Volume 4 VISAPP: VISAPP, 121-128, 2018 , Funchal, Madeira, Portugal