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Matrix metalloproteinases (MMPs) are endopeptidases responsible for degrading the extracellular matrix (ECM) and remodeling tissue in both physiological and pathological processes. MMP2 and membrane-type 1 MMP (MT1-MMP) have been associated with tumor invasion, metastasis and angiogenesis; therefore, a molecular imaging strategy assessing their activity may help to predict the malignancy of tumors...
Segmentation and tracking of multiple humans in crowded situations is made difficult by interobject occlusion. We propose a model-based approach to interpret the image observations by multiple partially occluded human hypotheses in a Bayesian framework. We define a joint image likelihood for multiple humans based on the appearance of the humans, the visibility of the body obtained by occlusion reasoning,...
We aim to define an event ontology that allows natural representation of complex spatio-temporal events common in the physical world by a composition of simpler events. The events are abstracted into three hierarchies. Primitive events are defined directly from the mobile object properties. Single-thread composite events are a number of primitive events with temporal sequencing. Multi-thread composite...
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