Additive Manufacturing (AM) technology distinguishes itself from more traditional fabrication processes by several significant factors. It allows the creation of objects with complex geometry that would not be possible by subtractive manufacturing or molding. Additionally, 3d printers are of much simpler use than other tools. Finally, since the cost per objects does not change depending on the ...

In this paper, we present our efforts towards deriving vocal tract shapes from ElectroMagnetic Articulograph data (EMA) via geometric adaptation and matching. We describe a novel approach for adapting Maeda’s geometric model of the vocal tract to one speaker in the MOCHA database. We show how we can rely solely on the EMA data for adaptation. We present our search technique for the vocal tract ...

This project addresses several research topics related to virtual reality, augment reality, geometry modeling, motion tracking, and visualization. The primary objective of this research effort is to devise new and innovative approaches and technologies that would improve the capabilities of information extraction, fusion, interpretation, and visualization from multiple sensor sources and datase...

Illumination for mixed reality consists of simulating the illumination of 3D scenes composed with real and virtual 3D objects. Current research into illumination methods for mixed reality focuses on im­ proving the quality of the simulated illumination, while assuming that the required input data, the scene geometry and radiance, can be accurately acquired. This thesis provides methods that red...

In this paper, a graphical dynamic simulator is developed that can simulate actively-coordinated wheeled vehicle systems on uneven faceted terrain. Based on the considerations of model delity and computational efciency, a simple geometric model for wheel-terrain contact is proposed. In addition, a computationallye cient algorithm for contact detection is developed. We also devise a contact forc...

Many problems in geometric modeling can be described using variational formulations that define the smoothness of the shape and its behavior w.r.t. the posed modeling constraints. For example, high-quality C2 surfaces that obey boundary conditions on positions, tangents and curvatures can be conveniently defined as solutions of high-order geometric PDEs; the advantage of such a formulation is i...

Rendering high-quality non-photorealistic images of a given geometric model is often associated with a considerable amount of effort on the part of a user to fine-tune the rendition. In this paper we introduce a method and tools for re-using the user’s effort invested in one model for the rendering of other models. Our method uses templates to describe rendition styles. The paper gives a number...

Appearance-based object recognition systems rely on training from imagery, which allows the recognition of objects without requiring a 3D geometric model. It has been little explored whether such systems can be trained from imagery that is unlabeled, and whether they can be trained from imagery that is not trivially segmentable. In this paper we present a method for minimally supervised trainin...

This paper presents a new methodology to establish the best global match of objects’ contours in images. The first step is the extraction of the sets of ordered points that define the objects’ contours. Then, by using the curvature value and its distance to the corresponded centroid for each point, an affinity matrix is built. This matrix contains information of the cost for all possible matche...

We consider the general problem of designing mechanical parts moving in contact under the influence of externally applied loads. Geometrically, the problem may be characterized in terms of a conjugate triplet which is formed by the two shapes moving in contact and their relative motion. We show that every such triplet belongs to one or more classes of functionally equivalent designs that may be...