def test_circle_model_predict():
model = CircleModel()
r = 5
model.params = (0, 0, r)
t = np.arange(0, 2 * np.pi, np.pi / 2)
xy = np.array(((5, 0), (0, 5), (-5, 0), (0, -5)))
assert_almost_equal(xy, model.predict_xy(t))
def test_circle_model_predict():
model = CircleModel()
r = 5
model.params = (0, 0, r)
t = np.arange(0, 2 * np.pi, np.pi / 2)
xy = np.array(((5, 0), (0, 5), (-5, 0), (0, -5)))
assert_almost_equal(xy, model.predict_xy(t))
def test_circle_model_estimate():
# generate original data without noise
model0 = CircleModel()
model0.params = (10, 12, 3)
t = np.linspace(0, 2 * np.pi, 1000)
data0 = model0.predict_xy(t)
# add gaussian noise to data
random_state = np.random.RandomState(1234)
data = data0 + random_state.normal(size=data0.shape)
# estimate parameters of noisy data
model_est = CircleModel()
model_est.estimate(data)
# test whether estimated parameters almost equal original parameters
assert_almost_equal(model0.params, model_est.params, 0)
def test_circle_model_estimate():
# generate original data without noise
model0 = CircleModel()
model0.params = (10, 12, 3)
t = np.linspace(0, 2 * np.pi, 1000)
data0 = model0.predict_xy(t)
# add gaussian noise to data
random_state = np.random.RandomState(1234)
data = data0 + random_state.normal(size=data0.shape)
# estimate parameters of noisy data
model_est = CircleModel()
model_est.estimate(data)
# test whether estimated parameters almost equal original parameters
assert_almost_equal(model0.params, model_est.params, 1)
def test_ransac_shape():
# generate original data without noise
model0 = CircleModel()
model0.params = (10, 12, 3)
t = np.linspace(0, 2 * np.pi, 1000)
data0 = model0.predict_xy(t)
# add some faulty data
outliers = (10, 30, 200)
data0[outliers[0], :] = (1000, 1000)
data0[outliers[1], :] = (-50, 50)
data0[outliers[2], :] = (-100, -10)
# estimate parameters of corrupted data
model_est, inliers = ransac(data0, CircleModel, 3, 5, random_state=1)
# test whether estimated parameters equal original parameters
assert_almost_equal(model0.params, model_est.params)
for outlier in outliers:
assert outlier not in inliers
def test_ransac_shape():
# generate original data without noise
model0 = CircleModel()
model0.params = (10, 12, 3)
t = np.linspace(0, 2 * np.pi, 1000)
data0 = model0.predict_xy(t)
# add some faulty data
outliers = (10, 30, 200)
data0[outliers[0], :] = (1000, 1000)
data0[outliers[1], :] = (-50, 50)
data0[outliers[2], :] = (-100, -10)
# estimate parameters of corrupted data
model_est, inliers = ransac(data0, CircleModel, 3, 5,
random_state=1)
# test whether estimated parameters equal original parameters
assert_equal(model0.params, model_est.params)
for outlier in outliers:
assert outlier not in inliers