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ViTImageClassify for logits or ViTModel for tokens / per-block features via as_backbone=True.timm/vit_tiny_patch16_384.augreg_in21k_ft_in1k for kerasformers. One implementation runs unmodified on TensorFlow / Torch / JAX.ViTImageClassify / ViTModel).1import os
2os.environ["KERAS_BACKEND"] = "torch" # or "jax" / "tensorflow"
3
4from PIL import Image
5import numpy as np
6from kerasformers.models.vit import ViTImageClassify, ViTModel
7
8model = ViTImageClassify.from_weights("kerasformers/vit_tiny_patch16_384_augreg_in21k_ft_in1k")
9backbone = ViTModel.from_weights(
10 "kerasformers/vit_tiny_patch16_384_augreg_in21k_ft_in1k", as_backbone=True
11)
12
13image = Image.open("your_image.jpg").convert("RGB")
14image = image.resize((224, 224))
15x = np.asarray(image, dtype="float32")[None] # (1, H, W, 3)
16print(model(x).shape) # (1, num_classes)
17feats = backbone(x)
18print(len(feats), [tuple(f.shape) for f in feats])from_weights("kerasformers/<variant>"):KERAS_BACKEND before importing Keras / kerasformers.ViTImageClassify returns class logits; ViTModel returns features (as_backbone=True for multi-scale stages).ViTImageClassify.from_weights("hf:timm/vit_tiny_patch16_384.augreg_in21k_ft_in1k").license (usually matches the upstream checkpoint).