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License: Apache License 2.0
Bayesian Non-Parametric Image Segmentation using HDP-MRF
License: Apache License 2.0
Following http://arxiv.org/abs/1201.1657 we should implement the HDP split-merge algorithm on the corpus-level (class; k) labels due to its potential to speed up mixing of the Gibb's sampler. The authors claim that "Split- merge algorithms can consider larger moves in the state space and have the potential to converge more quickly."
Instead of random initialization used currently, use "Sequential Prediction" as described in Sec 5.1 of https://cs.stanford.edu/~pliang/papers/permutation-dp-icml2007.pdf:
sequential prediction: a clustering is sampled according to the CRP but weighting the probability of choosing a cluster by the predictive likelihood of the new point given the existing points in the cluster.
which can be seen as a sort of 0th iteration with incrementally growing class/group membership as each data point is introduced to the sampler. wang notes that "this works well empirically"
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