def __init__(self):
super(GatherFlipFeature, self).__init__()
self.gather_nd = ops.GatherNd()
self.transpose = ops.Transpose()
self.perm_list = (1, 0, 2, 3)
self.shape = ops.Shape()
self.reshape = ops.Reshape()
def construct(self, x, seq_lengths):
"""Defines the ReverseSequence operator computation performed."""
batch_size = x.shape[self.batch_dim]
max_seq_len = x.shape[self.seq_dim]
seq_lens_type = seq_lengths.dtype
back = ops.Sub()(seq_lengths, ops.OnesLike()(seq_lengths))
batch_idx = self.make_shape((batch_size, max_seq_len), seq_lens_type,
0)
forward_idx = self.make_shape((batch_size, max_seq_len), seq_lens_type,
1)
back = back.view(-1, 1)
reverse_idx = ops.Sub()(back, forward_idx)
condition = ops.Less()(reverse_idx, ops.ZerosLike()(reverse_idx))
reverse_idx = ops.Select()(condition, forward_idx, reverse_idx)
reverse_idx = ops.ExpandDims()(reverse_idx, 2)
batch_idx = ops.ExpandDims()(batch_idx, 2)
if self.batch_dim > self.seq_dim:
batch_idx = ops.Transpose()(batch_idx, (1, 0, 2))
reverse_idx = ops.Transpose()(reverse_idx, (1, 0, 2))
x = ops.Transpose()(x, (1, 0, 2))
start_indices = ops.Concat(2)((batch_idx, reverse_idx))
output = ops.GatherNd()(x, start_indices)
return output
def __init__(self):
super(FlipLR, self).__init__()
self.gather_flip_feat = GatherFlipFeature()
self.half = ops.Split(axis=0, output_num=2)
self.flip = ops.ReverseV2(axis=[3])
self.flip_index = Tensor(
np.array(
[0, 2, 1, 4, 3, 6, 5, 8, 7, 10, 9, 12, 11, 14, 13, 16, 15],
np.int32))
self.gather_nd = ops.GatherNd()
def __init__(self):
super(GetSurroundFeature, self).__init__()
self.shape = ops.Shape()
self.concat = ops.Concat(axis=1)
self.reshape = ops.Reshape()
self.half = ops.Split(axis=-1, output_num=2)
self.tile = ops.Tile()
self.gather_nd = ops.GatherNd()
self.transpose = ops.Transpose()
self.perm_list = (0, 2, 3, 1)
self.order_list = (0, 3, 1, 2)
self.expand_dims = ops.ExpandDims()
def __init__(self, enable_cpu_gatherd=True):
super(GatherFeatureByInd, self).__init__()
self.tile = ops.Tile()
self.shape = ops.Shape()
self.concat = ops.Concat(axis=1)
self.reshape = ops.Reshape()
self.enable_cpu_gatherd = enable_cpu_gatherd
if self.enable_cpu_gatherd:
self.gather_nd = ops.GatherD()
self.expand_dims = ops.ExpandDims()
else:
self.gather_nd = ops.GatherNd()
def __init__(self):
super(FlipTensor, self).__init__()
self.half = ops.Split(axis=0, output_num=2)
self.flip = ops.ReverseV2(axis=[3])
self.gather_nd = ops.GatherNd()