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# Imports | |
import torch | |
import gradio as gr | |
from typing import Tuple, Dict | |
from timeit import default_timer as timer | |
import model | |
import os | |
# Class names | |
with open("class_names.txt", "r") as f: | |
class_names = [food.strip() for food in f.readlines()] | |
# Create instance of model | |
effnetb2, effnetb2_transforms = model.create_effnetb2_model(num_classes=len(class_names)) | |
# Load Weights | |
effnetb2.load_state_dict(state_dict=torch.load("effnetb2_food101_20pct.pth", | |
map_location=torch.device("cpu") # hard-coded load to cpu | |
)) | |
# Predict function | |
def predict(img) -> Tuple[Dict, float]: | |
# Start timer | |
start = timer() | |
# Transform input image for use | |
img = effnetb2_transforms(img).unsqueeze(dim=0) | |
# Put model in eval mode | |
effnetb2.eval() | |
with torch.inference_mode(): | |
logits = effnetb2(img) | |
pred_probs = torch.softmax(logits, dim=1).squeeze() | |
prediction = logits.argmax(dim=1).item() | |
prediction_label = class_names[prediction] | |
end = timer() | |
pred_dict = {class_names[i]: pred_probs[i].item() for i in range(len(class_names))} | |
delta_time = round(end-start, 4) | |
return pred_dict, delta_time | |
# Gradio app | |
# Create example list from within this file | |
example_list = [ ["examples/" + example] for example in os.listdir("examples")] | |
title = "FoodVision Big" | |
description = "EfficientNetB2 feature extractor CV model to classify images of 101 types of food from the Food101 dataset." | |
article = "Created for PyTorch ZTM course" | |
demo = gr.Interface(fn=predict, # maps inputs to outputs | |
inputs=gr.Image(type="pil"), | |
outputs=[gr.Label(num_top_classes=5, label="Predictions"), # for the prediction dictionary | |
gr.Number(label="Prediction time (s)") | |
], | |
examples=example_list, | |
title=title, | |
description=description, | |
article=article, | |
) | |
demo.launch() | |