How to use the aotools.image_processing.correlation_centroid function in aotools

def test_correlation_many():
    im = numpy.random.random((5, 10, 10))
    ref = numpy.random.random((10, 10))
    com = image_processing.correlation_centroid(im, ref, 0.3)
    assert (com.shape[0] == 2)
    assert(com.shape[1] == 5)

def test_correlation_error():
    im = numpy.random.random((10))
    ref = numpy.random.random((10, 10))
    com = image_processing.correlation_centroid(im, ref, threshold=0.3)

def test_correlation_single():
    im = numpy.random.random((10, 10))
    ref = numpy.random.random((10, 10))
    com = image_processing.correlation_centroid(im, ref, 0.3)
    assert(com.shape[0] == 2)