BACKGROUND Before disease rates can be calculated a tabulation of the length of follow-up for each person in the cohort has to be made. In complicated analyses such tabulations are often stratified by many characteristics, some which show no change with time, such as gender or year of birth, and some which do change with time, such as age or cumulative exposure. Available computer programs ofte...

We describe a system that uses graphical models to perform real-time high-level perception. Our system uses Markov Logic Networks to relate entities in images via first-order logical sentences to perform real-time semi-supervised person recognition. The system is a collection of “commodity-level” vision algorithms such as the Viola-Jones face detector, histogram matching and even low-level pixe...

Real-time 3D Person Tracking and Dense Stereo Maps Using GPU Acceleration

Recent experiments show that synchronous events can appear to an observer to occur at different times. Neural processing time delays are offered as an explanation of these temporal illusions, but equating perceived time with processing time leads to some thorny philosophical problems.