Emgu CV Library Documentation
FindFeatures Method
NamespacesEmgu.CVFeatureTreeFindFeatures()()()

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FindFeatures(array<Matrix<(Of <(Single>)>)>[]()[], Matrix<(Of <(Int32>)>)%, Matrix<(Of <(Double>)>)%, Int32, Int32)
Finds (with high probability) the k nearest neighbors in tr for each of the given (row-)vectors in desc, using best-bin-first searching ([Beis97]). The complexity of the entire operation is at most O(m*emax*log2(n)), where n is the number of vectors in the tree

FindFeatures(array<SURFFeature>[]()[], Matrix<(Of <(Int32>)>)%, Matrix<(Of <(Double>)>)%, Int32, Int32)
Finds (with high probability) the k nearest neighbors in tr for each of the given (row-)vectors in desc, using best-bin-first searching ([Beis97]). The complexity of the entire operation is at most O(m*emax*log2(n)), where n is the number of vectors in the tree

Assembly: Emgu.CV (Module: Emgu.CV) Version: 1.5.0.0 (1.5.0.0)