alt.freeweights.vision / cspdarknet53.ra_in1k
From: timm <huggingface.co/timm>Newsgroups: alt.freeweights.visionSubject:

cspdarknet53.ra_in1k

Date: 2026-11-15Commit: 505e5f9Signed: 2DC28CC7B26A283B ✓

Image classification model with 28M parameters. Safetensors weights, 222 MB in all. Published by timm under Apache-2.0.

28M params222MBcspdarknet53.ra_in1ksafetensorspermissive
FactsParams28MSize222 MBFormatssafetensorsTaskimage classificationLicenseApache-2.0From sourcepermissive
$ fw get timm/cspdarknet53.ra_in1k
# manifest sha256 ee70cf62594f… · 222 MB · 5 files
$ fw verify ./cspdarknet53.ra_in1k timm/cspdarknet53.ra_in1k
From sourceHosted (signed)timm/cspdarknet53.ra_in1kLast check: 2026-11-15 02:50 UTC

Get help: custom fine-tune or private deploy. We review your setup before we quote.

Works with

Runs with

Ranked by fit to this model (safetensors), then by GitHub stars.

Overview

Size
222 MB
Weights
111 MB (safetensors)
Parameters
28M
Formats
safetensors
Task
image classification
License
Apache-2.0 (permissive)
Files
5, each with a sha256
Publisher
timm
Added
2026-11-15
Section
alt.freeweights.vision
Lineage

Original release from the publisher.

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From sourcehuggingface.co2026-11-15 02:50 UTCpassed

Model card

From the publisher at commit 505e5f9. Shown as plain text with links; images open at the publisher.

Model card for cspdarknet53.ra_in1k#

A CSP-DarkNet (Cross-Stage-Partial) image classification model. Trained on ImageNet-1k in timm using recipe template described below.

Recipe details:

  • RandAugment RA recipe. Inspired by and evolved from EfficientNet RandAugment recipes. Published as B recipe in ResNet Strikes Back.
  • RMSProp (TF 1.0 behaviour) optimizer, EMA weight averaging
  • Step (exponential decay w/ staircase) LR schedule with warmup

Model Details#

Model Usage#

Image Classification#
from urllib.request import urlopen
from PIL import Image
import timm

img = Image.open(urlopen(
    'https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/beignets-task-guide.png'
))

model = timm.create_model('cspdarknet53.ra_in1k', pretrained=True)
model = model.eval()

# get model specific transforms (normalization, resize)
data_config = timm.data.resolve_model_data_config(model)
transforms = timm.data.create_transform(**data_config, is_training=False)

output = model(transforms(img).unsqueeze(0))  # unsqueeze single image into batch of 1

top5_probabilities, top5_class_indices = torch.topk(output.softmax(dim=1) * 100, k=5)
Feature Map Extraction#
from urllib.request import urlopen
from PIL import Image
import timm

img = Image.open(urlopen(
    'https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/beignets-task-guide.png'
))

model = timm.create_model(
    'cspdarknet53.ra_in1k',
    pretrained=True,
    features_only=True,
)
model = model.eval()

# get model specific transforms (normalization, resize)
data_config = timm.data.resolve_model_data_config(model)
transforms = timm.data.create_transform(**data_config, is_training=False)

output = model(transforms(img).unsqueeze(0))  # unsqueeze single image into batch of 1

for o in output:
    # print shape of each feature map in output
    # e.g.:
    #  torch.Size([1, 32, 256, 256])
    #  torch.Size([1, 64, 128, 128])
    #  torch.Size([1, 128, 64, 64])
    #  torch.Size([1, 256, 32, 32])
    #  torch.Size([1, 512, 16, 16])
    #  torch.Size([1, 1024, 8, 8])

    print(o.shape)
Image Embeddings#
from urllib.request import urlopen
from PIL import Image
import timm

img = Image.open(urlopen(
    'https://huggingface.co/datasets/huggingface/documentation-images/resolve/main/beignets-task-guide.png'
))

model = timm.create_model(
    'cspdarknet53.ra_in1k',
    pretrained=True,
    num_classes=0,  # remove classifier nn.Linear
)
model = model.eval()

# get model specific transforms (normalization, resize)
data_config = timm.data.resolve_model_data_config(model)
transforms = timm.data.create_transform(**data_config, is_training=False)

output = model(transforms(img).unsqueeze(0))  # output is (batch_size, num_features) shaped tensor

# or equivalently (without needing to set num_classes=0)

output = model.forward_features(transforms(img).unsqueeze(0))
# output is unpooled, a (1, 1024, 8, 8) shaped tensor

output = model.forward_head(output, pre_logits=True)
# output is a (1, num_features) shaped tensor

Model Comparison#

Explore the dataset and runtime metrics of this model in timm model results.

Citation#

@article{Wang2019CSPNetAN,
  title={CSPNet: A New Backbone that can Enhance Learning Capability of CNN},
  author={Chien-Yao Wang and Hong-Yuan Mark Liao and I-Hau Yeh and Yueh-Hua Wu and Ping-Yang Chen and Jun-Wei Hsieh},
  journal={2020 IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRW)},
  year={2019},
  pages={1571-1580}
}
@article{Redmon2018YOLOv3AI,
  title={YOLOv3: An Incremental Improvement},
  author={Joseph Redmon and Ali Farhadi},
  journal={ArXiv},
  year={2018},
  volume={abs/1804.02767}
}
@inproceedings{wightman2021resnet,
  title={ResNet strikes back: An improved training procedure in timm},
  author={Wightman, Ross and Touvron, Hugo and Jegou, Herve},
  booktitle={NeurIPS 2021 Workshop on ImageNet: Past, Present, and Future}
}
@misc{rw2019timm,
  author = {Ross Wightman},
  title = {PyTorch Image Models},
  year = {2019},
  publisher = {GitHub},
  journal = {GitHub repository},
  doi = {10.5281/zenodo.4414861},
  howpublished = {\url{https://github.com/huggingface/pytorch-image-models}}
}

Files

5 files · 222 MBWeights 111 MB (safetensors). Sizes and sha256 from the signed manifest.
Hide all 5 files with their sha256
FileSizesha256
.gitattributes1.48 KBdb7c0371f46f0840b8f25794c1e3321c9b5820a8cb6ba9694a46fc64b8fae5a6
README.md5.06 KB6e8fa7264e981dfd9cb9db1a4524ccfefd3e78f5dff35e152f77b92f11c82e32
config.json579 B08f3310198223913bc54686d54a92eee2bac7b270e053535a5a059daa9bdf49c
model.safetensors111 MB685ad4726e6e8785ecb778ab5d3a045e16d317be170e0f2caeb1f58800885546
pytorch_model.bin111 MB394a9371c7c52236fefe087aba296f60ad7401017b849916f4f9613fe0722d8c
VersionsEach time the pinned upstream commit or file list changed in this repo. Newest first.
Upstream commitDateContents
505e5f9c7a pinned now2026-11-15 02:50 UTC5 files · 222 MB

Use it

$ fw get timm/cspdarknet53.ra_in1k
# manifest sha256 ee70cf62594f… · 222 MB · 5 files
$ fw verify ./cspdarknet53.ra_in1k timm/cspdarknet53.ra_in1k
fw.pyChecks the signature and every sha256, tries each source in order, resumes.
$ python3 fw.py get https://freeweights.allternit.com/manifests/timm/cspdarknet53.ra_in1k.json --dir ./cspdarknet53.ra_in1k $ python3 fw.py verify ./cspdarknet53.ra_in1k ./timm__cspdarknet53.ra_in1k.json
hfThe Hugging Face CLI with one setting. Same repo id.
$ HF_ENDPOINT=https://freeweights.allternit.com hf download timm/cspdarknet53.ra_in1k --revision 505e5f9c7a6abe99fd8e4ed97f8cf48586945805 --local-dir ./cspdarknet53.ra_in1k

License

Name
Apache License 2.0
Id
Apache-2.0
Class
Permissive
Redistribution
yes
Listing
Hosted (signed)
Decided
License as declared by the publisher. No person read it. 2026-11-15
Text in
README.md
Text sha256
6e8fa7264e981dfd9cb9db1a4524ccfefd3e78f5dff35e152f77b92f11c82e32
Terms gate
No extra terms beyond the license.

Read the license text

Licenses are checked against the license table. A custom license passes only after a person reads it.

Provenance

From: timm <huggingface.co/timm>Newsgroups: alt.freeweights.visionSubject: cspdarknet53.ra_in1kDate: 2026-11-15Commit: 505e5f9Signed: 2DC28CC7B26A283B ✓
Upstream
timm/cspdarknet53.ra_in1k
Pinned commit
505e5f9c7a6abe99fd8e4ed97f8cf48586945805
Manifest
cspdarknet53.ra_in1k.json · .minisig
Manifest sha256
ee70cf62594fe53175afd8c8c8f42f4113279398e34b66846767f10acc5cabfa
Signature
minisign, Ed25519, key 2DC28CC7B26A283B
Created
2026-11-15 02:50 UTC
Generator
freeweights-manifest/0.1.0
Takedowns
None.

How to verify

$ curl -O https://freeweights.allternit.com/manifests/timm/cspdarknet53.ra_in1k.json $ curl -O https://freeweights.allternit.com/manifests/timm/cspdarknet53.ra_in1k.json.minisig $ minisign -Vm cspdarknet53.ra_in1k.json -P RWQ7KGqyx4zCLXtUFOqvfv8L3g+8fpKJ1FsuxPyOYMF+4KufbUxKq1Oq $ shasum -a 256 <file> # compare with the Files tab

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Signed manifest
minisign, key 2DC28CC7B26A283B. cspdarknet53.ra_in1k.json. Provenance. Takedown history: none.
From: dima806 <huggingface.co/dima806>Subject: ai_vs_real_image_detection
From: legekka <huggingface.co/legekka>Subject: AI-Anime-Image-Detector-ViT
From: onnx-community <huggingface.co/onnx-community>Subject: AI-Anime-Image-Detector-ViT-ONNX
From: AICodexLab <huggingface.co/AICodexLab>Subject: answerdotai-ModernBERT-base-ai-detector
From: onnx-community <huggingface.co/onnx-community>Subject: answerdotai-ModernBERT-base-ai-detector-ONNX
From: onnx-community <huggingface.co/onnx-community>Subject: bart-large-cnn-ONNX