3 papers
cs.CL2017
Crime Topic Modeling
Da Kuang, P. Jeffrey Brantingham, Andrea L. Bertozzi
The classification of crime into discrete categories entails a massive loss of information. Crimes emerge out of a complex mix of behaviors and situations, yet most of these detail…
cs.CV2016
Unsupervised Classification in Hyperspectral Imagery with Nonlocal Total Variation and Primal-Dual Hybrid Gradient Algorithm
Wei Zhu, Victoria Chayes, Alexandre Tiard +6
In this paper, a graph-based nonlocal total variation method (NLTV) is proposed for unsupervised classification of hyperspectral images (HSI). The variational problem is solved by…
cs.LG2016
A Harmonic Extension Approach for Collaborative Ranking
Da Kuang, Zuoqiang Shi, Stanley Osher +1
We present a new perspective on graph-based methods for collaborative ranking for recommender systems. Unlike user-based or item-based methods that compute a weighted average of ra…