October 07, 2011

"Learning Richly Structured Representations from Weakly Annotated Data" (This Year at the DeGroot Lecture)

Attention conservation notice: Only of interest if you (1) care about learning complex stochastic models from limited data, and (2) are in Pittsburgh.

The CMU statistics department sponsors an annual distinguished lecture series in memory of our sainted founder, Morris H. DeGroot. This year, it comes at the end of the workshop on Case Studies in Bayesian Statistics and Machine Learning. We are very happy to have as the lecturer Daphne Koller.

"Learning Richly Structured Representations from Weakly Annotated Data"
Abstract: The solution to many complex problems require that we build up a representation that spans multiple levels of abstraction. For example, to obtain a semantic scene understanding from an image, we need to detect and identify objects and assign pixels to objects, understand scene geometry, derive object pose, and reconstruct the relationships between different objects.
Fully annotated data for learning richly structured models can be obtained in very limited quantities; hence, for such applications and many others, we need to learn models from data where many of the relevant variables are unobserved. I will describe novel machine learning methods that can train models using weakly labeled data, thereby making use of much larger amounts of available data, with diverse levels of annotation. These models are inspired by ideas from human learning, in which the complexity of the learned models and the difficulty of the training instances tackled changes over the course of the learning process. We will demonstrate the applicability of these ideas of various problems, focusing on the problem of holistic computer vision.
Time and place:: 4:15 pm on Friday, 14 October 2011, in the McConomy Auditorium in the University Center

As always, the talk is free and open to the public.

Update, after the talk: We more than filled the auditorium; I had to sit on the stairs.

Enigmas of Chance

Posted at October 07, 2011 18:00 | permanent link

Three-Toed Sloth