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test_radon_transform: Test sinogram conversions.

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Jostein Bø Fløystad
2013-06-23 12:48:13 +02:00
parent b61ff7513e
commit 1caafd4451
1 changed files with 17 additions and 0 deletions
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skimage/transform/tests/test_radon_transform.py
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@@ -243,6 +243,23 @@ def test_radon_circle():
assert np.all(relative_error < 3e-3)
def check_sinogram_circle_to_square(size):
from skimage.transform.radon_transform import _sinogram_circle_to_square
image = _random_circle((size, size))
theta = np.linspace(0., 180., size, False)
sinogram_circle = radon(image, theta, circle=True)
sinogram_square = radon(image, theta, circle=False)
sinogram_circle_to_square = _sinogram_circle_to_square(sinogram_circle)
error = abs(sinogram_square - sinogram_circle_to_square)
print(np.mean(error), np.max(error))
assert np.allclose(sinogram_square, sinogram_circle_to_square)
def test_sinogram_circle_to_square():
for size in (50, 51):
yield check_sinogram_circle_to_square, size
def check_radon_iradon_circle(interpolation, shape, output_size):
# Forward and inverse radon on synthetic data
image = _random_circle(shape)