A method is described to derive source and conductivity estimates in a simultaneous MEG and EEG source analysis. In addition the covariance matrix of the estimates is derived. Simulation studies with a concentric spheres model and a more realistic boundary element model indicate that this method has several advantages, even if only a few EEG sensors are added to a MEG configuration. First, a si...

Locating source code elements relevant to a given feature is an important step in the process of re-engineering software variants, developed by an ad-hoc reuse technique, into a Software Product Line (SPL) for systematic reuse. Existing works on using Information Retrieval (IR) techniques do not consider the abstraction gap between feature and source code levels. In our recent work, we have imp...

In this paper, a maximum a posteriori sound source localization (MAP-SSL) algorithm is proposed for reverberant and noisy conditions. It is derived by incorporating a sparse prior on the source location into the existing maximum likelihood sound source localization (ML-SSL) framework. The criterion in deriving the proposed MAP-SSL algorithm is similar to the criterion used in deriving the exist...

Improving the geo-localization of optical satellite images is an important pre-processing step for many remote sensing tasks like monitoring by image time series or scene analysis after sudden events. These tasks require geo-referenced and precisely co-registered multi-sensor data. Images captured by the high resolution synthetic aperture radar (SAR) satellite TerraSAR-X exhibit an absolute geo...

To address future NASA challenges, integration of multiple source data will be a key component, and as a first step towards this goal, very accurate registration of multi-sensor data is the first requirement for such integration. While navigation often refers to “systematic correction”, image registration refers to “precision correction.” The systematic correction is modelbased, while precision...

This thesis documents work which is part of the ongoing effort by the Worcester Polytechnic Institute (WPI) Precision Personnel Locator (PPL) project, to track and locate first responders in urban/indoor settings. Specifically, the project intends to produce a system which can accurately determine the floor that a person is on, as well as where on the floor that person is, with sub-meter accura...

Lateral inhibition processing of an image yields subpixel precision in the location of intensity discontinuity edges in a digitized image. The method is illustrated using a 512 x 512 x 8 bit image.