LibreDETRr50dc5

Original DETR-DC5 with a dilated ResNet-50 backbone (41.5M parameters, 43.3 box AP on COCO val2017 in the upstream model zoo), repackaged for LibreYOLO. DC5 replaces the final backbone stride with dilation, producing a stride-16 feature map.

from libreyolo import LibreYOLO

model = LibreYOLO("LibreDETRr50dc5.pt")
results = model.predict("image.jpg")

LibreYOLO ships this family for inference and validation, plus ONNX and TorchScript export. Training is not implemented. The deployment contract uses a fixed 800x800 canvas; upstream COCO evaluation instead preserves aspect ratio with a short side of 800 and a long side capped at 1333.

Source

Derived from the official facebookresearch/detr checkpoint detr-r50-dc5-f0fb7ef5.pth at commit 29901c51d7fe8712168b8d0d64351170bc0f83e0. Copyright (c) Facebook, Inc. and its affiliates. Licensed under the Apache License 2.0.

Source checkpoint SHA-256: f0fb7ef52a6b0bbd87dce4a4b8569b509f03ad082f60f936dc5b7009940295d3.

Modifications

Checkpoint metadata wrap only. Learned parameter names and tensors are unchanged. See weights/convert_detr_weights.py in the LibreYOLO source repository.

Strict state-dict loading succeeds with no missing or unexpected keys. Against the pinned upstream implementation, identical input tensors produce exact FP32 outputs (max_abs_diff == 0.0) for both pred_logits and pred_boxes. DC5 is encoded in checkpoint metadata because it changes runtime dilation but no parameter shape. LibreYOLO maps the sparse COCO category ids to its contiguous 80-class public interface and does not apply NMS.

License

Apache License 2.0. See the LICENSE and NOTICE files in this repository.