def absolute_pose_ransac(bs, Xs, method, threshold, iterations, probabilty):
# in-house estimation
if in_house_multiview:
threshold = np.arccos(1 - threshold)
params = pyrobust.RobustEstimatorParams()
params.iterations = 1000
result = pyrobust.ransac_absolute_pose(bs, Xs, threshold, params,
pyrobust.RansacType.RANSAC)
Rt = result.lo_model.copy()
R, t = Rt[:3, :3].copy(), Rt[:, 3].copy()
Rt[:3, :3] = R.T
Rt[:, 3] = -R.T.dot(t)
return Rt
else:
try:
return pyopengv.absolute_pose_ransac(bs,
Xs,
method,
threshold,
iterations=iterations,
probabilty=probabilty)
except Exception:
# Older versions of pyopengv do not accept the probability argument.
return pyopengv.absolute_pose_ransac(bs, Xs, method, threshold,
iterations)
def test_outliers_absolute_pose_ransac(one_shot_and_its_points):
pose, bearings, points = one_shot_and_its_points
scale = 1e-3
bearings = copy.deepcopy(bearings)
bearings += np.random.rand(*bearings.shape) * scale
ratio_outliers = 0.3
add_outliers(ratio_outliers, bearings, 0.1, 1.0)
bearings /= np.linalg.norm(bearings, axis=1)[:, None]
params = pyrobust.RobustEstimatorParams()
params.iterations = 1000
result = pyrobust.ransac_absolute_pose(bearings, points, scale, params,
pyrobust.RansacType.RANSAC)
expected = pose.get_Rt()
tolerance = 0.05
inliers_count = (1 - ratio_outliers) * len(points)
assert np.isclose(len(result.inliers_indices),
inliers_count,
rtol=tolerance)
assert np.linalg.norm(expected - result.lo_model, ord='fro') < 8e-2
def absolute_pose_ransac(bs, Xs, threshold, iterations, probabilty):
params = pyrobust.RobustEstimatorParams()
params.iterations = 1000
result = pyrobust.ransac_absolute_pose(bs, Xs, threshold, params, pyrobust.RansacType.RANSAC)
Rt = result.lo_model.copy()
R, t = Rt[:3, :3].copy(), Rt[:, 3].copy()
Rt[:3, :3] = R.T
Rt[:, 3] = -R.T.dot(t)
return Rt
def absolute_pose_ransac(
bs: np.ndarray,
Xs: np.ndarray,
threshold: float,
iterations: int,
probability: float,
) -> np.ndarray:
params = pyrobust.RobustEstimatorParams()
params.iterations = iterations
result = pyrobust.ransac_absolute_pose(bs, Xs, threshold, params,
pyrobust.RansacType.RANSAC)
Rt = result.lo_model.copy()
R, t = Rt[:3, :3].copy(), Rt[:, 3].copy()
Rt[:3, :3] = R.T
Rt[:, 3] = -R.T.dot(t)
return Rt