Adaptive Belief Propagation
published: Dec. 5, 2015, recorded: October 2015, views: 1484
Download slides: icml2015_papachristoudis_belief_propagation_01.pdf (11.0 MB)
Report a problem or upload filesIf you have found a problem with this lecture or would like to send us extra material, articles, exercises, etc., please use our ticket system to describe your request and upload the data.
Enter your e-mail into the 'Cc' field, and we will keep you updated with your request's status.
Graphical models are widely used in inference problems. In practice, one may construct a single large-scale model to explain a phenomenon of interest, which may be utilized in a variety of settings. The latent variables of interest, which can differ in each setting, may only represent a small subset of all variables. The marginals of variables of interest may change after the addition of measurements at different time points. In such adaptive settings, naive algorithms, such as standard belief propagation (BP), may utilize many unnecessary computations by propagating messages over the entire graph. Here, we formulate an efficient inference procedure, termed adaptive BP (AdaBP), suitable for adaptive inference settings. We show that it gives exact results for trees in discrete and Gaussian Markov Random Fields (MRFs), and provide an extension to Gaussian loopy graphs. We also provide extensions on finding the most likely sequence of the entire latent graph. Lastly, we compare the proposed method to standard BP and to that of (Sumer et al., 2011), which tackles the same problem. We show in synthetic and real experiments that it outperforms standard BP by orders of magnitude and explore the settings that it is advantageous over (Sumer et al., 2011).
Link this pageWould you like to put a link to this lecture on your homepage?
Go ahead! Copy the HTML snippet !