Memory Efficient Max Flow for Multi-Label Submodular MRFs
Thalaiyasingam Ajanthan, Richard Hartley, Mathieu Salzmann
Abstract
Multi-label submodular Markov Random Fields (MRFs) have been shown to be solvable using max-flow based on an encoding of the labels proposed by Ishikawa, in which each variable X_i is represented by l nodes (where l is the number of labels) arranged in a column. However, this method in general requires 2l^2 edges for each pair of neighbouring variables. This makes it inapplicable to realistic problems with many variables and labels, due to excessive memory requirement. In this paper, we introduce a variant of the max-flow algorithm that requires much less storage. Consequently, our algorithm makes it possible to optimally solve multi-label submodular problems involving large numbers of variables and labels on a standard computer.
BibTeX
@inproceedings{cvpr2016_memoryefficientm,
title = {Memory Efficient Max Flow for Multi-Label Submodular MRFs},
author = {Thalaiyasingam Ajanthan and Richard Hartley and Mathieu Salzmann},
booktitle = {CVPR 2016},
year = {2016}
}