def alignment_assertions(expected):
ref_field = create_rectangular_field_function((0, 0), (20, 25),
5,
rotation=0)
moving_field = create_rectangular_field_function(
(-expected[0], -expected[1]), (20, 25), 5, rotation=-expected[2])
x_span = np.arange(-50, 51)
y_span = np.arange(-60, 61)
axes = (x_span, y_span)
ref_image = ref_field(x_span[:, None], y_span[None, :])
moving_image = moving_field(x_span[:, None], y_span[None, :])
results = align_images(axes, ref_image, axes, moving_image, max_shift=20)
shifted_image = shift_and_rotate(axes, axes, moving_image, *results)
try:
assert np.allclose(shifted_image, ref_image, rtol=0.01, atol=0.01)
except AssertionError:
plt.figure()
plt.imshow(ref_image)
plt.figure()
plt.imshow(shifted_image)
plt.figure()
plt.imshow(shifted_image - ref_image)
plt.show()
raise
def test_interpolated_rotation():
ref_field = create_rectangular_field_function((0, 0), (5, 7),
2,
rotation=30)
moving_field = create_rectangular_field_function((0, 0), (5, 7),
2,
rotation=10)
x_span = np.linspace(-20, 20, 100)
y_span = np.linspace(-30, 30, 120)
ref_image = ref_field(x_span[:, None], y_span[None, :])
moving_image = moving_field(x_span[:, None], y_span[None, :])
moving_interp = create_image_interpolation((x_span, y_span), moving_image)
no_rotation = interpolated_rotation(moving_interp, (x_span, y_span), 0)
try:
assert np.allclose(no_rotation, moving_image)
except AssertionError:
plt.figure()
plt.imshow(moving_image)
plt.axis("equal")
plt.figure()
plt.imshow(no_rotation)
plt.axis("equal")
plt.show()
raise
rotated = interpolated_rotation(moving_interp, (x_span, y_span), -20)
try:
assert np.allclose(ref_image, rotated, atol=1.0e-1)
except AssertionError:
plt.figure()
plt.imshow(ref_image)
plt.axis("equal")
plt.figure()
plt.imshow(rotated)
plt.axis("equal")
plt.figure()
plt.imshow(rotated - ref_image)
plt.axis("equal")
plt.show()
raise
