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Alpha Expansion iteration get negative cost #474

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shenh10 opened this issue Aug 25, 2016 · 0 comments
Open

Alpha Expansion iteration get negative cost #474

shenh10 opened this issue Aug 25, 2016 · 0 comments

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@shenh10
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shenh10 commented Aug 25, 2016

Hi I am using pystruct to call opengm alpha-expansion module to train a graph crf. However, the program brokes with an error as following:

opengm/include/opengm/inference/auxiliary/minstcutkolmogorov.hxx:70: void opengm::external::MinSTCutKolmogorov<NType, VType>::addEdge(opengm::external::MinSTCutKolmogorov<NType, VType>::node_type, opengm::external::MinSTCutKolmogorov<NType, VType>::node_type, opengm::external::MinSTCutKolmogorov<NType, VType>::ValueType) [with NType = long unsigned int; VType = double; opengm::external::MinSTCutKolmogorov<NType, VType>::node_type = long unsigned int; opengm::external::MinSTCutKolmogorov<NType, VType>::ValueType = double]: Assertion `cost >= 0' failed.

However, if I switch to alpha-expansionfusion the program trains properly with same input. Is there a bug here?
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