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dump_lsh_data_to_pickle.py
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dump_lsh_data_to_pickle.py
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#! /usr/bin/env python
#coding=utf-8
# Authors: Hanxiaoyang <hanxiaoyang.ml@gmail.com>
# use lsh on the 128/20 bit binary pre-compute image index feature
# 代码功能:对图像产出的128/20 二值检索串,应用局部敏感度哈希(以便召回)
# 作者:寒小阳<hanxiaoyang.ml@gmail.com>
import sys
import numpy as np
import os
from scipy.sparse import csr_matrix
import cPickle as pickle
from lshash import LSHash
from bitarray import bitarray
def dump_lsh_data_to_pickle(bits_tid_pickle, lsh_pickle):
f = file(bits_tid_pickle, "rb")
data = pickle.load(f)
f.close()
#这里的参数可以调整,具体见https://github.com/kayzh/LSHash
lsh = LSHash(13, 128, num_hashtables=1)
map(lambda x:lsh.index(np.array([int(tmp) for tmp in x])), data.keys())
out = file(lsh_pickle,"wb")
pickle.dump(lsh, out, -1)
out.close()
if __name__ == '__main__':
if len(sys.argv) != 3:
print "usage: python dump_lsh_data_to_pickle.py [128/20 bits index fea file] [lsh_pickle_file]"
exit(1)
index_fea_pickle = sys.argv[1]
lsh_pickle = sys.argv[2]
dump_lsh_data_to_pickle(index_fea_pickle, lsh_pickle)