FLANN indexing for Python. Issue using LSH algorithm

asked 2015-05-26 04:14:30 -0500

Atu gravatar image

Hello there. I am trying to do LSH search on some dataset, say 1000x128 with FLANN search. FLANN indexing is done with http://www.cs.ubc.ca/research/flann/ And then there's PyFlann's python module that I'm using. my code looks like this

flann = FLANN()
data = np.random.random((1000,128)).astype(np.float32)
desc = np.random.random((100,128)).astype(np.float32)

params = flann.build_index(data, algorithm="lsh", precision=0.7, table_number=6, key_size=12, multi_probe_level=1, cores=1)

and there's this error on CentOS 6.5

LSH is not implemented for that type
terminate called without an active exception
Aborted (core dumped)

This one on my windows 7 machine


self.__curindex = flann.build_index[pts.dtype.type](pts, npts, dim, byref(speedup), pointer(self.__flann_parameters))
WindowsError: [Error -529697949] Windows Error 0xE06D7363

So I googled for how to build index using LSH algorithm. And found no answer to my question in Python. Anybody having figured this out yet?

edit retag flag offensive close merge delete


so, how is this related to opencv ?

berak gravatar imageberak ( 2015-05-26 04:55:15 -0500 )edit

I just realized that it's remotely related. Probably none. But I haven't found any other potential community to answer my question. Hope I didn't bother anyone.

Atu gravatar imageAtu ( 2015-05-26 20:43:44 -0500 )edit