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import gradio as gr
import os
import torch
from model import create_ViT
from timeit import default_timer as timer
from typing import Tuple, Dict
# Setup class names
with open("class_names.txt", "r") as f:
class_names = [food_name.strip() for food_name in f.readlines()]
# Create model
ViT_model, ViT_transforms = create_ViT(
num_classes=126,
)
# Load saved weights
ViT_model.load_state_dict(
torch.load(
f="ViT.pth",
map_location=torch.device("cpu"),
)
)
# Create predict function
def predict(img) -> Tuple[Dict, float]:
start_time = timer()
# Transform the target image and add a batch dimension
img = ViT_transforms(img).unsqueeze(0)
# Put model into evaluation mode and turn on inference mode
ViT_model.eval()
with torch.inference_mode():
# Pass the transformed image through the model and turn the prediction logits into prediction probabilities
pred_probs = torch.softmax(ViT_model(img), dim=1)
# Create a prediction label and prediction probability dictionary for each prediction class (this is the required format for Gradio's output parameter)
pred_labels_and_probs = {class_names[i]: float(pred_probs[0][i]) for i in range(len(class_names))}
# Calculate the prediction time
pred_time = round(timer() - start_time, 5)
# Return the prediction dictionary and prediction time
return pred_labels_and_probs, pred_time
##GRADIO APP
# Create title, description and article strings
title = "FoodVision🍔🍟🍦"
description = "A Vision Transformer feature extractor computer vision model to classify images of food into 126 different classes."
article = "Created by [Rohit](https://github.com/ItsNotRohit02)."
# Create examples list from "examples/" directory
example_list = [["examples/" + example] for example in os.listdir("examples")]
# Create Gradio interface
demo = gr.Interface(
fn=predict,
inputs=gr.Image(type="pil"),
outputs=[
gr.Label(num_top_classes=5, label="Predictions"),
gr.Number(label="Prediction time (s)"),
],
examples=example_list,
title=title,
description=description,
article=article,
)
# Launch the app!
demo.launch()
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