[mlpack-git] [mlpack/mlpack] Implementation of Multiprobe LSH (#691)
Ryan Curtin
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Mon Jun 27 16:00:00 EDT 2016
> +
> + // Loop invariable: after pvec iterations, additionalProbingBins contains pvec
> + // valid codes of the lowest-scoring bins (bins most likely to contain
> + // neighbors of the query).
> + for (size_t pvec = 0; pvec < T; ++pvec)
> + {
> + std::vector<bool> Ai;
> + do
> + {
> + // Get the perturbation set corresponding to the minimum score.
> + Ai = perturbationSets[ minHeap.top().second ];
> + minHeap.pop(); // .top() returns, .pop() removes
> +
> + // Shift operation on Ai (replace max with max+1).
> + std::vector<bool> As = Ai;
> + if ( perturbationShift(As) && perturbationValid(As, numProj) )
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