28,896 research outputs found
Probabilistic Motion Estimation Based on Temporal Coherence
We develop a theory for the temporal integration of visual motion motivated
by psychophysical experiments. The theory proposes that input data are
temporally grouped and used to predict and estimate the motion flows in the
image sequence. This temporal grouping can be considered a generalization of
the data association techniques used by engineers to study motion sequences.
Our temporal-grouping theory is expressed in terms of the Bayesian
generalization of standard Kalman filtering. To implement the theory we derive
a parallel network which shares some properties of cortical networks. Computer
simulations of this network demonstrate that our theory qualitatively accounts
for psychophysical experiments on motion occlusion and motion outliers.Comment: 40 pages, 7 figure
Target Tracking in Non-Gaussian Environment
Masreliez filter which is a Kalman type of recursive filter
is implemented and validated. The main computation in
Masreliez filter is to evaluate the score function which
directly influences the estimates of the target states. Scalar
approximation for score function evaluation is extended to
vector observations, implemented and validated. The
simulation studies have shown that the performance of the
Masreliez filter is relatively better than that of the
conventional Kalman filter in the presence of significant
glint noise in the observation
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