def getFeaturePath(self, query, photoId, featureId):
from database import DBHelper
db_helper = DBHelper()
subPath = db_helper.getPhotoSubDir(photoId)
featurePath = ''.join([self.featureRoot ,'/', featureId, '/',query , '/' , subPath , '/', '%s_%s.mat'%(featureId, photoId)])
return featurePath
