Diffuse Optical Techniques Applied to Wood Characterisation

Optical flow techniques applied to video coding

Motion estimation is an important part of most video coding schemes because it enables us to exploit the high degree of temporal redundancy present. Though block matching algorithms (BMA) yield coarse and piecewise-constant elds, they are very popular due to their simplicity and low bit overhead. In this paper, we propose to use a more advanced gradient-based technique to overcome the disadvant...

Constrained Reconstruction Techniques for Diffuse Optical Tomography

Three-dimensional diffuse optical tomography (DOT) attempts to map in vivo tissue blood oxygenation and blood volume levels by reconstructing the spatial distribution of the optical absorption coefficient from intensity measurements on the surface of the body. This problem is typically ill-posed due to the large attenuation and scattering of the diffuse wave. In addition, certain applications, ...

Nonlinear Optimal Control Techniques Applied to a Launch Vehicle Autopilot

This paper presents an application of the nonlinear optimal control techniques to the design of launch vehicle autopilots. The optimal control is given by the solution to the Hamilton-Jacobi-Bellman (HJB) equation, which in this case cannot be solved explicity. A method based upon Successive Galerkin Approximation (SGA), is used to obtain an approximate optimal solution. Simulation results invo...

Intelligent Decision Support and Agent-Based Techniques Applied to Wood Manufacturing

Comparing Two Regularization Techniques for Diffuse Optical Tomography

Two techniques to regularize the diffuse optical tomography inverse problem were compared for a variety of simulated test domains. One method repeats the single-step Tikhonov approach until a stopping criteria is reached, regularizing the inverse problem by scaling the maximum of the diagonal of the inversion matrix with a factor held constant throughout the iterative reconstruction. The second...