%D 2007 %A V. Kolmogorov %I University College London %C London, UK %X Recently, Komodakis et al. [6] developed the FastPD algorithm for the semi-metric labeling problem, which extends the expansion move algorithm of Boykov et al. [2]. We present a slightly different derivation of the FastPD method. %T A note on the primal-dual method for the semi-metric labeling problem %L discovery3849