JohnLangford/vowpal_wabbit — pull request #107 by pmineiro (2013-03-12 04:35:35+00:00)
Title: Demo2

Well it turns out computing n-grams horizontal, vertical, and diagonal directions results in a respectable linear model for mnist. Adding a single hidden unit improves it with almost no impact on wall clock.

Wouldn't it be great to integrate OpenCV or something equivalent as a reduction and be able to generate cool features for images on the fly? Compose that with a reduction which creates dynamic deformations as invariant hints and you'd get something pretty cool for vision problems.