Adaptive extraction and visualization
of silhouette curves from volumetric datasets
Published: The Visual Computer, 20(4), 2004, pages 243-252
Placement of Deformable Objects
Published: Computer Graphics Forum, 23(4) 2004, pages 727-739.
Real-time Incision Simulation Using Discontinuous Free Form Deformation
Surgical simulations with the aid of computers is a topic of increasingly
extensive research. Real-time response and interactivity are crucial components
of any such system and a major effort has been invested in finding ways to
improve the performance of existing systems.
In this paper, we propose the use of a new variant of Free Form Deformations that supports discontinuities (DFFD) in complex real time surgical simulations. The proposed scheme can benefit from an a priori or, alternatively, interactive low resolution, physical simulation of the incision procedure that is encoded into the DFFD. The DFFD is then applied to the geometry of the tissue in hand, a two-dimensional skin shape or a three-dimensional volumetric representation, capturing the incision's shape as well as the behavior of the neighborhood geometry over time.
Presented: The international Symposium on Medical Simulation June 2004, Cambridge,
Published: Springer LNCS volume 3078 pages 114-123.
Discontinuous Free Form Deformation
Free Form Deformation (FFD) has become an acceptable design paradigm.
Contemporary deformation tools let designers modify the geometry of the deformed
model. This approach can be restrictive if the designer wants to incorporate
holes or gaps into a model while deforming it into a different shape. This work
presents a variant of FFD that would let the designer incorporate iso-parametric
discontinuities into the deformation function. The input model is automatically
split at these discontinuities, allowing the deformed model to reflect
topological discontinuity changes.
We demonstrate the deformation algorithm using two different applications. The first application wraps a moving model around obstacles in a scene, splitting and then re-forming it. The second application works locally, enabling the end-user to insert arbitrarily shaped cuts into the surface of the model.
Published: The 12th Pacific Conference on Graphics and Applications, Seoul, Korea, 2004, pages 227-236.
GPU related publications
Most of my current research is focused on doing geometric-centric operations on the GPU.
Geometric Modeling on the GPU is less common then doing other general purpose computations such as image processing or computer vision. Only recently have this topic have captured the attention of researchers.