Master's Research - Biomedical Engineering / Imaging & Registration (2005)
An Interactive Non-Rigid Hybrid Registration Framework for 3D Medical Images
This
research introduces a new interactive hybrid non-rigid registration framework
that combines any intensity-based algorithm with a feature-based component,
using an iterative dual energy minimization. The resulting transformation
combines both intensity-based and feature-based deformation fields. The
feature matching exploits user-placed landmark pairs, and based on saliency
and similarity measures, optimizes the correspondences in the neighborhood
of each landmark. A dense feature-based deformation field is then generated
using a thin-plate spline interpolation and combined to the intensity
field using a Gaussian-based confidence map. Additionally, the framework
allows user interactivity for live guidance of the algorithm in case of
errors or inaccuracies.
We present three experimental results of our hybrid approach on lung,
pelvis and brain datasets, and show that in each case, the registration
benefited from the hybrid approach as opposed to its intensity component
alone.
Engineering Final Project (2004):
GPU-Based Displacement Mapping for Simulation
Applications
[ Paper (english) ] - [ Full
thesis (french) ] - [ IEEE Magazine ]
I introduce a solution for a completely GPU-based displacement mapping
applied in a scientific simulation context. More particularly, I provide
a high-level algorithm to compute element displacements within a mesh,
with vector values applied at each node of the mesh. Several possibilities
involving the vertex and the fragment shader are explored. While an ideal
solution would use the vertex shader, current hardware and API limitations
force us to use the fragment shader, in a multiple-pass rendering algorithm
using 2D and 3D textures to store and modify the simulation data.
The t3D project is an attempt at a 3D modeling and rendering software I started during the summer of 2002. The project has been an amazing learning experience but I have now stopped working on it. Still fun to play around with it though.
Visit the t3D project's website
Weblight is a simple batch downloading program I wrote after being frustrated with every other software I tried. Simply give Weblight a URL, and it will allow you to automatically download any type of file linked from that page. You can for example capture all the pdf files from a page, or download all the images linked from a photo album.
