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LWDETR fix amp #2073

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Merged
felixdittrich92 merged 1 commit into from
Jun 15, 2026
Merged

LWDETR fix amp #2073

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9 changes: 8 additions & 1 deletion doctr/models/layout/lw_detr/pytorch.py
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Original file line number Diff line number Diff line change
Expand Up @@ -123,6 +123,10 @@ def _probiou(
Returns:
probiou: (N,) or (N, M) tensor of IoU-like similarities in [0, 1]
"""
# AMP safe-guard
boxes1 = boxes1.float()
boxes2 = boxes2.float()

if scale != 1.0:
boxes1 = torch.cat([boxes1[..., :4] * scale, boxes1[..., 4:]], dim=-1)
boxes2 = torch.cat([boxes2[..., :4] * scale, boxes2[..., 4:]], dim=-1)
Expand Down Expand Up @@ -649,6 +653,9 @@ def compute_loss(
loss: the computed loss value
"""
alpha, gamma, eps = 0.25, 2.0, 1e-8
# AMP safe-guard
logits = logits.float()
pred_boxes = pred_boxes.float()
device = logits.device
batch_size = logits.shape[0]

Expand Down Expand Up @@ -683,7 +690,7 @@ def compute_loss(
cost_class = pos_cost[:, tgt_labels] - neg_cost[:, tgt_labels]

# L1 cost on normalized (cx, cy, w, h)
cost_bbox = torch.cdist(out_boxes[:, :4], tgt_boxes[:, :4], p=1)
cost_bbox = torch.cdist(out_boxes[:, :4].float(), tgt_boxes[:, :4].float(), p=1)

# Rotated IoU cost, computed in pixel coordinates
# this term also carries the angle signal for the matching
Expand Down
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