An opposition to LOCUS

David Lee

Unsupervised?

Poor dataset

and

How to take advantage of it with top-down generative approach

Unsupervised?

Images themselves are already a crude segmentation

Assumptions (Tell the system that…) There exists one horse, facing left, occupying 15-30% of the image, centered (although authors claim they’re not), strong edge between foreground & background small color/texture variance within foreground

Weizmann horses & Caltech 101 !!

Mean of Canny edges

Mean of hand-labeled mask

Top-down generative approach When the data has strong constraints,

take advantage of that high level prior knowledge.

If you know what the data is like, let the generative model be it.

My Universal Horse Segmentation

MUHS 70%

My Universal Horse Segmentation

0.536240 0.880552 0.4939960.708324 0.718089 0.5303420.802334 0.545985 0.470904