# 5.5.1.3. eqcorrscan.utils.correlate.numpy_normxcorr

`eqcorrscan.utils.correlate.``numpy_normxcorr`(templates, stream, pads, *args, **kwargs)

  Compute the normalized cross-correlation using numpy and bottleneck.

  Parameters: | templates (np.ndarray) 2D Array of templates stream (np.ndarray) 1D array of continuous data pads (list) List of ints of pad lengths in the same order as templates
  Returns: | np.ndarray of cross-correlations
  Returns: | np.ndarray channels used