def test_displacement_int_stats(self):
# Here, we only check that the use of stats
# does not through an exception.
img = np.random.normal(size=(32, 32))
img2 = shift(img, (1, 2))
displacement = dic(img, img2, pixelar, bsize=8, stats=True)
assert_equal(displacement.dy, np.ones(len(displacement.dy)) * 1)
assert_equal(displacement.dx, np.ones(len(displacement.dy)) * 2)
def test_rbf_displacement_int(self):
method = 'rbf'
img2 = shift(self.img, (1, 2))
displacement = dic(self.img,
img2,
subpixelar_interp,
bsize=8,
method=method)
assert_array_almost_equal(displacement.dy,
np.ones(len(displacement.dy)) * 1)
assert_array_almost_equal(displacement.dx,
np.ones(len(displacement.dx)) * 2)
def test_interp2d_displacement_float2(self):
method = 'interp2d'
shift = 1.7
npoints = 15
tform = tf.AffineTransform(scale=(1, 1),
rotation=0,
translation=(-shift, 0),
shear=0)
img2 = tf.warp(self.img, tform, order=3)
displacement = dic(self.img,
img2,
subpixelar_interp,
num_points_interp=npoints,
method=method)
assert_almost_identical(displacement.dy,
np.zeros(len(displacement.dy)),
tol=0.12)
expected = np.ones(len(displacement.dx)) * shift
assert_array_less(np.abs(displacement.dx - expected[1]),
np.ones(expected[1].shape) * 0.31)
def test_RectBivariateSpline_displacement_float(self):
method = 'RectBivariateSpline'
shift = 1.3
npoints = 5
tform = tf.AffineTransform(scale=(1, 1),
rotation=0,
translation=(-shift, 0),
shear=0)
img2 = tf.warp(self.img, tform, order=3)
displacement = dic(self.img,
img2,
subpixelar_interp,
bsize=8,
num_points_interp=npoints,
method=method)
assert_array_almost_equal(displacement.dy,
np.zeros(len(displacement.dy)))
expected = np.ones(len(displacement.dx)) * shift
assert_array_less(np.abs(displacement.dx - expected[1]),
np.ones(expected[1].shape) * 0.31)
def test_displacement_int(self):
img = np.random.normal(size=(32, 32))
img2 = shift(img, (1, 2))
displacement = dic(img, img2, pixelar, bsize=8)
assert_equal(displacement.dy, np.ones(len(displacement.dy)) * 1)
assert_equal(displacement.dx, np.ones(len(displacement.dy)) * 2)