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体验新版 GitCode,发现更多精彩内容 >>
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28949f8e
编写于
3月 09, 2019
作者:
D
dengkaipeng
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fix doc. test=develop
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5c1920b7
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+15
-9
paddle/fluid/operators/temporal_shift_op.cc
paddle/fluid/operators/temporal_shift_op.cc
+15
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paddle/fluid/operators/temporal_shift_op.cc
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@@ -84,8 +84,8 @@ class TemporalShiftOpMaker : public framework::OpProtoAndCheckerMaker {
...
@@ -84,8 +84,8 @@ class TemporalShiftOpMaker : public framework::OpProtoAndCheckerMaker {
This operator calculates the temporal shifting features for Input(X).
This operator calculates the temporal shifting features for Input(X).
Input(X) should be in shape of [N*T, C, H, W], while N is the batch
Input(X) should be in shape of [N*T, C, H, W], while N is the batch
size, T is the temporal segment number
, C is the channel number
,
size, T is the temporal segment number
specified by :attr:`seg_num`
,
H and W is the height and width of features.
C is the channel number,
H and W is the height and width of features.
Temporal Shifting calculates as follows:
Temporal Shifting calculates as follows:
...
@@ -95,15 +95,21 @@ class TemporalShiftOpMaker : public framework::OpProtoAndCheckerMaker {
...
@@ -95,15 +95,21 @@ class TemporalShiftOpMaker : public framework::OpProtoAndCheckerMaker {
padding width as 1 on each side, padding result will be in shape
padding width as 1 on each side, padding result will be in shape
of [N, T+2, C, H, W].
of [N, T+2, C, H, W].
Step 3: Assume :attr:`shift_ratio` is :math:`
0.25
`, slice padding
Step 3: Assume :attr:`shift_ratio` is :math:`
1/4
`, slice padding
result as follows:
result as follows:
slice1 = x[:, :T, :C/4, :, :]
$$
slice2 = x[:, 2:T+2, C/4:C/2, :, :]
slice1 = x[:, :T, :C/4, :, :]
slice3 = x[:, 1:T+1, C/2:, :, :]
$$
$$
Step 4: Concatenate three slices with :math:`axis=2` and reshape result
slice2 = x[:, 2:T+2, C/4:C/2, :, :]
to [N*T, C, H, W]
$$
$$
slice3 = x[:, 1:T+1, C/2:, :, :]
$$
Step 4: Concatenate three slices along the 3rd(C) dimension and
reshape result to [N*T, C, H, W].
For details of temporal shifting, please refer to paper:
For details of temporal shifting, please refer to paper:
`Temporal Shift Module <http://arxiv.org/abs/1811.08383>`_ .
`Temporal Shift Module <http://arxiv.org/abs/1811.08383>`_ .
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