app.py

### 1. Imports and class names setup ### 
### 1. Imports and class names setup ###
import gradio as gr
import os
import torch

from model import create_mobilenet_model
from timeit import default_timer as timer
from typing import Tuple, Dict

# Setup class names
class_names = ['bacterial', 'blast', 'brownspot', 'tungro']

### 2. Model and transforms preparation ###

mobilenet, manual_transforms = create_mobilenet_model(
    num_classes=4
)

mobilenet.load_state_dict(
    torch.load(
        f="mobilenet_5_epochs.pth",
        map_location=torch.device("cpu"),
    )
)

### 3. Predict function ###
def predict(img) -> Tuple[Dict, float]:
    start_time = timer()
    
    img = manual_transforms(img).unsqueeze(0)
    
    mobilenet.eval()
    with torch.inference_mode():
        pred_probs = torch.softmax(mobilenet(img), dim=1)
    
    pred_labels_and_probs = {class_names[i]: float(pred_probs[0][i]) for i in range(len(class_names))}
    
    pred_time = round(timer() - start_time, 5)
    
    return pred_labels_and_probs, pred_time

### 4. Gradio app ###

# Create a Blocks app (only one!)
with gr.Blocks() as gradio_app:
    
    gr.HTML(
        """
        <h1 style='text-align: center'>
        Rice Disease Classification - MobileNet Model
        </h1>
        """
    )
    
    gr.HTML(
        """
        <h3 style='text-align: center'>
        Follow me for more!
<!--     <a href='https://twitter.com/kadirnar_ai' target='_blank'>Twitter</a> | -->
        <a href='https://github.com/ExplorerGumel' target='_blank'>Github</a> | 
        <a href='https://www.linkedin.com/in/munzali-alhassan/' target='_blank'>Linkedin</a>  | 
<!--         <a href='https://www.huggingface.co/kadirnar/' target='_blank'>HuggingFace</a> -->
        </h3>
        """
    )
    
    with gr.Row():
        with gr.Column():
            image = gr.Image(type="pil", label="Upload Image")
            infer = gr.Button(value="Predict")
            
            # Examples linked to the input component 'image'
            example_list = [["examples/" + example] for example in os.listdir("examples")]
            gr.Examples(
                examples=example_list,
                inputs=[image]  # Pass the actual input component
            )

        with gr.Column():
            label = gr.Label(num_top_classes=4, label="Predictions")
            pred_time = gr.Number(label="Prediction Time (s)")
        
        infer.click(
            fn=predict,
            inputs=[image],
            outputs=[label, pred_time]
        )

# Launch the app
gradio_app.launch(debug=True, share=True)
# gradio_app.launch(debug=True, share=True)
# # Create title, description and article strings
# title = "RICE DISEASES CLASSIFICATION"
# description = "A MobileNetV2 feature extractor computer vision model to classify images of Rice diseases."
# article = "Created by Munzali Alhassan."

# # Create examples list from "examples/" directory
# example_list = [["examples/" + example] for example in os.listdir("examples")]

# # Create the Gradio demo
# demo = gr.Interface(fn=predict, # mapping function from input to output
#                     inputs=gr.Image(type="pil"), # what are the inputs?
#                     outputs=[gr.Label(num_top_classes=4, label="Predictions"), # what are the outputs?
#                              gr.Number(label="Prediction time (s)")], # our fn has two outputs, therefore we have two outputs
#                     # Create examples list from "examples/" directory
#                     examples=example_list, 
#                     title=title,
#                     description=description,
#                     article=article)

# # Launch the demo!
# demo.launch(share=True)