Optimizing binary MRFs via extended roof duality Conference Paper


Author(s): Rother, Carsten; Kolmogorov, Vladimir; Lempitsky, Victor; Szummer, Martin
Title: Optimizing binary MRFs via extended roof duality
Affiliation
Abstract: Many computer vision applications rely on the efficient optimization of challenging, so-called non-submodular, binary pairwise MRFs. A promising graph cut based approach for optimizing such MRFs known as "roof duality" was recently introduced into computer vision. We study two methods which extend this approach. First, we discuss an efficient implementation of the "probing" technique introduced recently by Boros et al. [5]. It simplifies the MRF while preserving the global optimum. Our code is 400-700 faster on some graphs than the implementation of [5]. Second, we present a new technique which takes an arbitrary input labeling and tries to improve its energy. We give theoretical characterizations of local minima of this procedure. We applied both techniques to many applications, including image segmentation, new view synthesis, superresolution, diagram recognition, parameter learning, texture restoration, and image deconvolution. For several applications we see that we are able to find the global minimum very efficiently, and considerably outperform the original roof duality approach. In comparison to existing techniques, such as graph cut, TRW, BP, ICM, and simulated annealing, we nearly always find a lower energy.
Keywords: Deconvolution; Global optimization; Graph theory; Image segmentation; Learning systems; Parameter estimation; Simulated annealing
Conference Title: CVPR: Computer Vision and Pattern Recognition
Conference Dates: June 17-22, 2007
Conference Location: Minneapolis, MN, USA
Publisher: IEEE  
Date Published: 2007-07-16
Start Page: article 4270228
URL:
DOI: 10.1109/CVPR.2007.383203
Open access: no
IST Austria Authors
Related IST Austria Work