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LibreYOLO/
LibrePPLiteSegb75-sem

Name: LibrePPLiteSegb75-sem
Availability: InStock

libreyolo

image-segmentation

semantic-segmentation

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LibrePPLiteSegb75-sem

NON-COMMERCIAL WEIGHTS. These weights are trained on Cityscapes. The Cityscapes license permits distributing abstract derivative models from which the dataset cannot be recovered, and restricts the dataset and its derivatives to non-commercial use. The restriction applies to this checkpoint, not to LibreYOLO's MIT code or to the PP-LiteSeg architecture. Weights you train from scratch on your own data carry none of it; a fine-tune started from this checkpoint inherits it. Read the restriction before you download.

PP-LiteSeg b75 (STDC2 backbone, native 768x1536 canvas), a real-time semantic segmentation model for Cityscapes' 19 classes, repackaged for LibreYOLO.

python

from libreyolo import LibreYOLO

model = LibreYOLO("LibrePPLiteSegb75-sem.pt")
result = model.predict("street.jpg")[0]
mask = result.semantic_mask.data          # (H, W) class IDs on the original canvas

This is a genuinely rectangular model: it runs at 768x1536 (height x width), not a square canvas. Published Cityscapes validation mIoU for the source checkpoint is 78.52. LibreYOLO has not re-measured that number; it is quoted from the source release, and exact raw-logit parity does not by itself reproduce an end-to-end dataset evaluation.

Source

Source artifact: pp_lite_b_seg75_cityscapes.pth, SHA-256 383bfb69b3ffb643224dbf76047acacd9b48a1564958a20f1aca69c5453dca3e (verified before conversion).

The STDC backbone lineage comes from MichaelFan01/STDC-Seg at commit 59ff37fbd693b99972c76fcefe97caa14aeb619f, MIT. Copyright (c) 2021 Mingyuan Fan. The architecture was cross-checked against PaddlePaddle/PaddleSeg at commit 3c4db66de1d9d59d0628ed87590b6308a2f4aa2a, Apache-2.0; no PaddleSeg code was copied.

Paper: PP-LiteSeg: A Superior Real-Time Semantic Segmentation Model.

Modifications

State-dict key remapping only: the upstream net payload with exactly one module. DDP prefix stripped, wrapped in LibreYOLO v1.0 checkpoint metadata. Learned parameters are unchanged, and the three training auxiliary heads are retained so the checkpoint stays trainable. The port reproduces the pinned upstream exactly (max_abs_diff == 0.0 on the main logits). See weights/convert_ppliteseg_weights.py and weights/parity_ppliteseg.py in the LibreYOLO source repository.

License

The code is Apache-2.0 (super-gradients) with MIT STDC lineage; both license texts are in LICENSE, and attribution is in NOTICE.

The weights in this repository are non-commercial under the Cityscapes dataset terms linked above. Downstream users are responsible for complying with them.

LibreYOLO/LibrePPLiteSegb75-sem

LibrePPLiteSegb75-sem

Source

Modifications

License

LibreYOLO/
LibrePPLiteSegb75-sem