alt.freeweights.vision / cspresnet50.ra_in1k
From: timm <huggingface.co/timm>Newsgroups: alt.freeweights.visionSubject:

cspresnet50.ra_in1k

Date: 2026-11-15Commit: 7718c2dSigned: 2DC28CC7B26A283B ✓

Image classification model with 22M parameters. Safetensors weights, 173 MB in all. Published by timm under Apache-2.0.

22M params173MBcspresnet50.ra_in1ksafetensorspermissive
FactsParams22MSize173 MBFormatssafetensorsTaskimage classificationLicenseApache-2.0From sourcepermissive
$ fw get timm/cspresnet50.ra_in1k
# manifest sha256 c8c8245ba59f… · 173 MB · 5 files
$ fw verify ./cspresnet50.ra_in1k timm/cspresnet50.ra_in1k
From sourceHosted (signed)timm/cspresnet50.ra_in1kLast check: 2026-11-15 03:38 UTC

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Works with

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

Overview

Size
173 MB
Weights
86.7 MB (safetensors)
Parameters
22M
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
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Original release from the publisher.

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From sourcehuggingface.co2026-11-15 03:38 UTCpassed

Model card

From the publisher at commit 7718c2d. Shown as plain text with links; images open at the publisher.

Model card for cspresnet50.ra_in1k#

A CSP-ResNet (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('cspresnet50.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(
    'cspresnet50.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, 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(
    'cspresnet50.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{He2015,
  author = {Kaiming He and Xiangyu Zhang and Shaoqing Ren and Jian Sun},
  title = {Deep Residual Learning for Image Recognition},
  journal = {arXiv preprint arXiv:1512.03385},
  year = {2015}
}
@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 · 173 MBWeights 86.7 MB (safetensors). Sizes and sha256 from the signed manifest.
Hide all 5 files with their sha256
FileSizesha256
.gitattributes1.48 KBdb7c0371f46f0840b8f25794c1e3321c9b5820a8cb6ba9694a46fc64b8fae5a6
README.md5.06 KBf776936da276aebd7fb34074d3db9183a9b4f9f97a0f1119ed1625598174d46d
config.json578 Bb8c47d49fc6de82177e62541ac9ec56c83124ed350045dbdc01677445eb72df8
model.safetensors86.7 MBf34ed53e4bb92e01538a2265c5d503db0bcfe149be6fc1ae21d3be842af2cea8
pytorch_model.bin86.7 MBf29e438fc7f5d3063ac66915d8528b3438345078008d8943c2fe3c88c2253cb1
VersionsEach time the pinned upstream commit or file list changed in this repo. Newest first.
Upstream commitDateContents
7718c2df34 pinned now2026-11-15 03:38 UTC5 files · 173 MB

Use it

$ fw get timm/cspresnet50.ra_in1k
# manifest sha256 c8c8245ba59f… · 173 MB · 5 files
$ fw verify ./cspresnet50.ra_in1k timm/cspresnet50.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/cspresnet50.ra_in1k.json --dir ./cspresnet50.ra_in1k $ python3 fw.py verify ./cspresnet50.ra_in1k ./timm__cspresnet50.ra_in1k.json
hfThe Hugging Face CLI with one setting. Same repo id.
$ HF_ENDPOINT=https://freeweights.allternit.com hf download timm/cspresnet50.ra_in1k --revision 7718c2df3464843cd9df0025d6e24293020d8904 --local-dir ./cspresnet50.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
f776936da276aebd7fb34074d3db9183a9b4f9f97a0f1119ed1625598174d46d
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: cspresnet50.ra_in1kDate: 2026-11-15Commit: 7718c2dSigned: 2DC28CC7B26A283B ✓
Upstream
timm/cspresnet50.ra_in1k
Pinned commit
7718c2df3464843cd9df0025d6e24293020d8904
Manifest
cspresnet50.ra_in1k.json · .minisig
Manifest sha256
c8c8245ba59fb16d37e2c449d8cbed3111e1087f3ee3c2697d82decb2785af19
Signature
minisign, Ed25519, key 2DC28CC7B26A283B
Created
2026-11-15 03:38 UTC
Generator
freeweights-manifest/0.1.0
Takedowns
None.

How to verify

$ curl -O https://freeweights.allternit.com/manifests/timm/cspresnet50.ra_in1k.json $ curl -O https://freeweights.allternit.com/manifests/timm/cspresnet50.ra_in1k.json.minisig $ minisign -Vm cspresnet50.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. cspresnet50.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