app.py

import gradio as gr
import torch
import timm
from torchvision import transforms
from PIL import Image

model = timm.create_model('vit_base_patch16_224', pretrained=False, num_classes=2)
model.load_state_dict(torch.load("vis_trans_cat_dog.pth", map_location='cpu'))
model.eval()

transform = transforms.Compose([
    transforms.Resize((224, 224)),
    transforms.ToTensor(),
    transforms.Normalize([0.5], [0.5])
])

def predict(img):
    img = img.convert("RGB")
    input_tensor = transform(img).unsqueeze(0)
    with torch.no_grad():
        outputs = model(input_tensor)
        _, predicted = torch.max(outputs, 1)
        return "Cat" if predicted.item() == 0 else "Dog"

interface = gr.Interface(
    fn=predict,
    inputs=gr.Image(type="pil"),
    outputs=gr.Label(),
    title="ViT Cat vs Dog Classifier 🐱🐶",
    description="Upload an image of a cat or dog and get a prediction from a Vision Transformer model."
)

if __name__ == "__main__":
    interface.launch()