Home > 6.899 Learning and Inference in Vision
MIT 6.899
Learning and Inference in Vision
Reading class
Learning and
Inference
Statistical dependencies between
variables
Learning and
Inference
y1
y2
Observed variables
x1
x2
Unobserved variables
Statistical dependencies between
variables
Learning and
Inference
Observed variables
Unobserved variables
“Learning”: learn this model, and the form
of the statistical dependencies.
Statistical dependencies between
variables
Learning and
Inference
y1
y2
Observed variables
x1
x2
Unobserved variables
“Learning”: learn this model, and the form
of the statistical dependencies.
“Inference”: given this model, and the observations, y1 & y2, infer x1 & x2, or their conditional distribution.
Cartoon history
of speech recognition research
Same story for
document understanding
Computer vision
is ready to make that transition
Categories of
the papers
1 Learning image
representations
Example training image
From http://www.amsci.org/amsci/articles/00articles/olshausencap1.html
1 Learning image
representations
From: http://www.cns.nyu.edu/pub/eero/simoncelli01-reprint.pdf
2 Learning manifolds
From: http://www.sciencemag.org/cgi/content/full/290/5500/2319
Joshua B. Tenenbaum, Vin de Silva, John C. Langford
2 Learning manifolds
From: http://www.sciencemag.org/cgi/content/full/290/5500/2319
2 Learning manifolds
From: http://www.sciencemag.org/cgi/content/full/290/5500/2319
3 Linear and
bilinear models
From: http://www-psych.stanford.edu/~jbt/NC120601.pdf
4 Learning low-level
vision
From Y. Weiss, http://www.cs.berkeley.edu/~yweiss/iccv01.ps.gz
Images, under
different lighting
reflectance
illumination
5 Graphical
models, belief propagation
From: http://www.cs.berkeley.edu/~yweiss/nips96.pdf
6 Particle filters
and tracking
From: http://www.robots.ox.ac.uk/~ab/abstracts/eccv96.isard.html
7 Face and object
recognition
From Viola and Jones, http://www.ai.mit.edu/people/viola/research/publications/ICCV01-Viola-Jones.ps.gz
7 Face and object
recognition
From Viola and Jones, http://www.ai.mit.edu/people/viola/research/publications/ICCV01-Viola-Jones.ps.gz
7 Face and object
recognition
From: Pinar Duygulu, Kobus Barnard, Nando deFreitas, and David Forsyth,
8 Learning models
of object appearance
Weber, Welling, and Perona,
http://www.gatsby.ucl.ac.uk/~welling/papers/ECCV00_fin.ps.gz
Images containing
the object
Images not containing the object
8 Learning models
of object appearance
Test images
Weber, Welling, and Perona,
http://www.gatsby.ucl.ac.uk/~welling/papers/ECCV00_fin.ps.gz
Contains the object?
Contains the object?
8 Learning models
of object appearance
Weber, Welling, and Perona, http://www.gatsby.ucl.ac.uk/~welling/papers/ECCV00_fin.ps.gz
Guest lecturers/discussants
Class requirements
1. Read the
papers, discuss them
2. Presentations
about a paper
3. Programming
example
Toy problems
Toy problem
by Ted Adelson
Toy problem
“If you can make a system
to solve this, I’ll give you a PhD”
by Ted Adelson
Particle filter
for inferring human motion in 3-d
From: Hedvig Sidenbladh’s thesis, http://www.nada.kth.se/~hedvig/publications/thesis.pdf
Particle filter
toy example
From: Hedvig Sidenbladh’s thesis, http://www.nada.kth.se/~hedvig/publications/thesis.pdf
What we’ll
have at the end of the class
Non-negative matrix factorization example
1-d particle filtering example
Boosting for face recognition
Example of belief propagation for scene understanding.
Manifold learning comparisons.
…
Code examples
4. Final project:
write a conference paper
Feedback options
What background
do you need?
Auditing versus
credit
First paper
Second paper
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