Augmented Reality system based on sketches for geometry education

This paper presents AG3DO (Augmented Geometry 3D Objects) prototype, a tool for generating three-dimensional geometrical objects starting from two-dimensional freehand line drawings. This system is used to assist students in the process of understanding descriptive geometry. By means of Augmented Reality (AR) technology, 3D geometric models reconstructed from sketches (freehand drawings) can be visualized. The input sketches represent two contour projections of the final three-dimensional object. The tests concluded that our prototype improves the spatial ability of the user.