def test_reduce_mean(x, axis, kd, dtype_str, tensor_fn, dev_str, call):
# smoke test
x = tensor_fn(x, dtype_str, dev_str)
ret = ivy.reduce_mean(x, axis, kd)
# type test
assert ivy.is_array(ret)
# cardinality test
if axis is None:
expected_shape = [1] * len(x.shape) if kd else []
else:
axis_ = [axis] if isinstance(axis, int) else axis
axis_ = [item % len(x.shape) for item in axis_]
expected_shape = list(x.shape)
if kd:
expected_shape = [
1 if i % len(x.shape) in axis_ else item
for i, item in enumerate(expected_shape)
]
else:
[expected_shape.pop(item) for item in axis_]
expected_shape = [1] if expected_shape == [] else expected_shape
assert ret.shape == tuple(expected_shape)
# value test
assert np.allclose(call(ivy.reduce_mean, x),
ivy.numpy.reduce_mean(ivy.to_numpy(x)))
# compilation test
helpers.assert_compilable(ivy.reduce_mean)
def pixel_cost_volume(image1, image2, search_range, batch_shape=None):
"""
Compute cost volume from image feature patch comparisons between first image
:math:`\mathbf{X}_1\in\mathbb{R}^{h×w×d}` and second image :math:`\mathbf{X}_2\in\mathbb{R}^{h×w×d}`, as used in
FlowNet paper.\n
`[reference] <https://www.cv-foundation.org/openaccess/content_iccv_2015/papers/Dosovitskiy_FlowNet_Learning_Optical_ICCV_2015_paper.pdf>`_
:param image1: Image 1 *[batch_shape,h,w,D]*
:type image1: array
:param image2: Image 2 *[batch_shape,h,w,D]*
:type image2: array
:param search_range: Search range for patch comparisons.
:type search_range: int
:param batch_shape: Shape of batch. Inferred from inputs if None.
:type batch_shape: sequence of ints, optional
:return: Cost volume between the images *[batch_shape,h,w,(search_range*2+1)^2]*
"""
if batch_shape is None:
batch_shape = image1.shape[:-3]
# shapes as list
batch_shape = list(batch_shape)
# shape info
shape = image1.shape
h = shape[-3]
w = shape[-2]
max_offset = search_range * 2 + 1
# pad dims
pad_dims = [[0, 0]] * len(batch_shape) + [[search_range, search_range]
] * 2 + [[0, 0]]
# BS x (H+2*SR) x (W+2*SR) x D
padded_lvl = _ivy.zero_pad(image2, pad_dims)
# create list
cost_vol = []
# iterate through patches
for y in range(0, max_offset):
for x in range(0, max_offset):
# BS x H x W x D
tensor_slice = padded_lvl[..., y:y + h, x:x + w, :]
# BS x H x W x 1
cost = _ivy.reduce_mean(image1 * tensor_slice,
axis=-1,
keepdims=True)
# append to list
cost_vol.append(cost)
# BS x H x W x (max_offset^2)
return _ivy.concatenate(cost_vol, -1)
def _log_nested(self, nest, global_step, name_hierarchy, spec):
if not ivy.exists(self._writer):
raise Exception('torch must be installed in order to use the file writer for tensorboard logging.')
if 'global_vector_norm' in spec:
self._writer.add_scalar(name_hierarchy + '/global vector norm',
ivy.to_scalar(ivy.to_native(nest.vector_norm(global_norm=True))), global_step)
for k, v in nest.items():
new_name_hierarchy = name_hierarchy + '/' + k
if isinstance(v, dict):
self._log_nested(v, global_step, new_name_hierarchy, spec)
else:
if 'mean' in spec:
self._writer.add_scalar(new_name_hierarchy + '/mean',
ivy.to_scalar(ivy.to_native(ivy.reduce_mean(v))), global_step)
if 'abs_mean' in spec:
self._writer.add_scalar(new_name_hierarchy + '/abs mean',
ivy.to_scalar(ivy.to_native(ivy.reduce_mean(ivy.abs(v)))), global_step)
if 'var' in spec:
self._writer.add_scalar(new_name_hierarchy + '/var',
ivy.to_scalar(ivy.to_native(ivy.reduce_var(v))), global_step)
if 'abs_var' in spec:
self._writer.add_scalar(new_name_hierarchy + '/abs var',
ivy.to_scalar(ivy.to_native(ivy.reduce_var(ivy.abs(v)))), global_step)
if 'min' in spec:
self._writer.add_scalar(new_name_hierarchy + '/min',
ivy.to_scalar(ivy.to_native(ivy.reduce_min(v))), global_step)
if 'abs_min' in spec:
self._writer.add_scalar(new_name_hierarchy + '/abs min',
ivy.to_scalar(ivy.to_native(ivy.reduce_min(ivy.abs(v)))), global_step)
if 'max' in spec:
self._writer.add_scalar(new_name_hierarchy + '/max',
ivy.to_scalar(ivy.to_native(ivy.reduce_max(v))), global_step)
if 'abs_max' in spec:
self._writer.add_scalar(new_name_hierarchy + '/abs max',
ivy.to_scalar(ivy.to_native(ivy.reduce_max(ivy.abs(v)))), global_step)
if 'vector_norm' in spec:
self._writer.add_scalar(new_name_hierarchy + '/vector norm',
ivy.to_scalar(ivy.to_native(ivy.vector_norm(v))), global_step)
def compute_cost_and_sdfs(learnable_anchor_vals, anchor_points,
start_anchor_val, end_anchor_val, query_points, sim):
anchor_vals = ivy.concatenate(
(ivy.expand_dims(start_anchor_val, 0), learnable_anchor_vals,
ivy.expand_dims(end_anchor_val, 0)), 0)
joint_angles = ivy_robot.sample_spline_path(anchor_points, anchor_vals,
query_points)
link_positions = ivy.transpose(
sim.ivy_manipulator.sample_links(joint_angles), (1, 0, 2))
length_cost = compute_length(link_positions)
sdf_vals = sim.sdf(ivy.reshape(link_positions, (-1, 3)))
coll_cost = -ivy.reduce_mean(sdf_vals)
total_cost = length_cost + coll_cost * 10
return total_cost[0], joint_angles, link_positions, ivy.reshape(
sdf_vals, (-1, 100, 1))
def get_reward(self):
"""
Get reward based on current state
:return: Reward array
"""
# Goal proximity.
x = ivy.reduce_sum(ivy.cos(self.angles), -1)
y = ivy.reduce_sum(ivy.sin(self.angles), -1)
xy = ivy.concatenate([ivy.expand_dims(x, 0),
ivy.expand_dims(y, 0)],
axis=0)
rew = ivy.reshape(
ivy.exp(-1 * ivy.reduce_sum((xy - self.goal_xy)**2, -1)), (-1, ))
return ivy.reduce_mean(rew, axis=0, keepdims=True)
def compute_cost_and_sdfs(learnable_anchor_vals, anchor_points,
start_anchor_val, end_anchor_val, query_points, sim):
anchor_vals = ivy.concatenate(
(ivy.expand_dims(start_anchor_val, 0), learnable_anchor_vals,
ivy.expand_dims(end_anchor_val, 0)), 0)
poses = ivy_robot.sample_spline_path(anchor_points, anchor_vals,
query_points)
inv_ext_mat_query_vals = ivy_mech.rot_vec_pose_to_mat_pose(poses)
body_positions = ivy.transpose(
sim.ivy_drone.sample_body(inv_ext_mat_query_vals), (1, 0, 2))
length_cost = compute_length(body_positions)
sdf_vals = sim.sdf(ivy.reshape(body_positions, (-1, 3)))
coll_cost = -ivy.reduce_mean(sdf_vals)
total_cost = length_cost + coll_cost * 10
return total_cost[0], poses, body_positions, ivy.reshape(
sdf_vals, (-1, 100, 1))
def _compute_cost(self, network, batch, dev_str, v=None):
network_output = network(batch.input, v=v)
return ivy.reduce_mean((network_output - batch.target)**2)[0]
def compute_length(query_vals):
start_vals = query_vals[:, 0:-1]
end_vals = query_vals[:, 1:]
dists_sqrd = ivy.maximum((end_vals - start_vals)**2, 1e-12)
distances = ivy.reduce_sum(dists_sqrd, -1)**0.5
return ivy.reduce_mean(ivy.reduce_sum(distances, 1))
def loss_fn(v_):
out = linear_layer(x, v=v_)
return ivy.reduce_mean(out)[0]
def loss_fn(v_):
out, (state_h, state_c) = lstm_layer(x, v=v_)
return ivy.reduce_mean(out)[0]
def _loss_fn(self, model, rays_o, rays_d, target, v=None):
rgb, depth = ivy_vision.render_implicit_features_and_depth(
model, rays_o, rays_d, near=ivy.ones(self._img_dims, dev_str=self._dev_str) * 2,
far=ivy.ones(self._img_dims, dev_str=self._dev_str) * 6, samples_per_ray=self._num_samples, v=v)
return ivy.reduce_mean((rgb - target) ** 2)[0]
def loss_fn(v):
pred = model(esm_obs, v=v)
return ivy.reduce_mean((pred - target)**2)
def loss_fn(v_):
out = module(x, v=v_)
return ivy.reduce_mean(out)[0]