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update position encoding to make detr torch fx traceable #531

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update position encoding to make detr torch fx traceable #531

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916c8d7
update position encoding to make detr torch fx traceable
inisis Aug 31, 2022
7d31e0f
fix torch script bug introduced by adding torch fx
inisis Aug 31, 2022
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7 changes: 6 additions & 1 deletion models/position_encoding.py
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Original file line number Diff line number Diff line change
Expand Up @@ -37,7 +37,7 @@ def forward(self, tensor_list: NestedTensor):
y_embed = y_embed / (y_embed[:, -1:, :] + eps) * self.scale
x_embed = x_embed / (x_embed[:, :, -1:] + eps) * self.scale

dim_t = torch.arange(self.num_pos_feats, dtype=torch.float32, device=x.device)
dim_t = torch_arange(self.num_pos_feats, dtype=torch.float32, device=x.device)
dim_t = self.temperature ** (2 * (dim_t // 2) / self.num_pos_feats)

pos_x = x_embed[:, :, :, None] / dim_t
Expand Down Expand Up @@ -87,3 +87,8 @@ def build_position_encoding(args):
raise ValueError(f"not supported {args.position_embedding}")

return position_embedding


@torch.fx.wrap
def torch_arange(x: int, dtype: torch.dtype, device: torch.device) -> torch.Tensor:
return torch.arange(x, dtype=dtype, device=device)