app.py

import gradio as gr
import numpy as np
import json
import joblib
import tensorflow as tf
import pandas as pd
from joblib import load
from tensorflow.keras.models import load_model
from sklearn.preprocessing import MinMaxScaler
import os
import sklearn  # Import sklearn

# Display library versions
print(f"Gradio version: {gr.__version__}")
print(f"NumPy version: {np.__version__}")
print(f"Scikit-learn version: {sklearn.__version__}")
print(f"Joblib version: {joblib.__version__}")
print(f"TensorFlow version: {tf.__version__}")
print(f"Pandas version: {pd.__version__}")

# Directory paths for the saved models
script_dir = os.path.dirname(os.path.abspath(__file__))
scaler_path = os.path.join(script_dir, 'toolkit', 'scaler_X.json')
rf_model_path = os.path.join(script_dir, 'toolkit', 'rf_model.joblib')
mlp_model_path = os.path.join(script_dir, 'toolkit', 'mlp_model.keras')
meta_model_path = os.path.join(script_dir, 'toolkit', 'meta_model.joblib')
image_path = os.path.join(script_dir, 'toolkit', 'car.png')

# Load the scaler and models
try:
    # Load the scaler
    with open(scaler_path, 'r') as f:
        scaler_params = json.load(f)
    scaler_X = MinMaxScaler()
    scaler_X.scale_ = np.array(scaler_params["scale_"])
    scaler_X.min_ = np.array(scaler_params["min_"])
    scaler_X.data_min_ = np.array(scaler_params["data_min_"])
    scaler_X.data_max_ = np.array(scaler_params["data_max_"])
    scaler_X.data_range_ = np.array(scaler_params["data_range_"])
    scaler_X.n_features_in_ = scaler_params["n_features_in_"]
    scaler_X.feature_names_in_ = np.array(scaler_params["feature_names_in_"])

    # Load the models
    loaded_rf_model = load(rf_model_path)
    print("Random Forest model loaded successfully.")
    loaded_mlp_model = load_model(mlp_model_path)
    print("MLP model loaded successfully.")
    loaded_meta_model = load(meta_model_path)
    print("Meta model loaded successfully.")
except Exception as e:
    print(f"Error loading models or scaler: {e}")

def predict_new_values(new_input_data):
    try:
        # Ensure the new input data is in the correct format
        print(f"Raw Input Data: {new_input_data}")
        new_input_data = np.array(new_input_data).reshape(1, -1)
        
        # Scale the new input data
        new_input_scaled = scaler_X.transform(new_input_data)
        print(f"Scaled Input Data: {new_input_scaled}")

        # Make predictions with the MLP model
        contamination_predictions, gradients_predictions = loaded_mlp_model.predict(new_input_scaled)

        return contamination_predictions[0], gradients_predictions[0]
    except Exception as e:
        print(f"Error in prediction: {e}")
        return (["Error"] * 6, ["Error"] * 6)

def gradio_interface(velocity, temperature, precipitation, humidity):
    try:
        input_data = [velocity, temperature, precipitation, humidity]
        print(f"Input Data: {input_data}")
        contamination_predictions, gradients_predictions = predict_new_values(input_data)
        print(f"Contamination Predictions: {contamination_predictions}")
        print(f"Gradients Predictions: {gradients_predictions}")
        return (
            [f"{val * 100:.2f}%" if val != "Error" else "Error" for val in contamination_predictions],
            [f"{val:.2f}" if val != "Error" else "Error" for val in gradients_predictions]
        )
    except Exception as e:
        print(f"Error in Gradio interface: {e}")
        return (["Error"] * 6, ["Error"] * 6)

inputs = [
    gr.Slider(minimum=0, maximum=100, value=50, step=0.05, label="Velocity (mph)"),
    gr.Slider(minimum=-2, maximum=30, value=0, step=0.5, label="Temperature (°C)"),
    gr.Slider(minimum=0, maximum=1, value=0, step=0.01, label="Precipitation (inch)"),
    gr.Slider(minimum=0, maximum=100, value=50, label="Humidity (%)")
]

contamination_outputs = [
    gr.Textbox(label="Front Left Contamination"),
    gr.Textbox(label="Front Right Contamination"),
    gr.Textbox(label="Left Contamination"),
    gr.Textbox(label="Right Contamination"),
    gr.Textbox(label="Roof Contamination"),
    gr.Textbox(label="Rear Contamination")
]

gradients_outputs = [
    gr.Textbox(label="Front Left Gradient"),
    gr.Textbox(label="Front Right Gradient"),
    gr.Textbox(label="Left Gradient"),
    gr.Textbox(label="Right Gradient"),
    gr.Textbox(label="Roof Gradient"),
    gr.Textbox(label="Rear Gradient")
]

with gr.Blocks() as demo:
    gr.Markdown("<h1 style='text-align: center;'>Environmental Factor-Based Contamination & Gradient Prediction</h1>")
    gr.Markdown("This application predicts the contamination levels and corresponding gradients for different parts of a car's LiDAR system based on environmental factors such as velocity, temperature, precipitation, and humidity.")
    
    with gr.Row():
        with gr.Column():
            gr.Markdown("### Input Parameters")
            for inp in inputs:
                inp.render()

            # Centered image display
            with gr.Row():
                with gr.Column(scale=1, min_width=0):
                    gr.Image(image_path)  # Ensure the image is centered
            
            gr.Button(value="Submit", variant="primary").click(fn=gradio_interface, inputs=inputs, outputs=contamination_outputs + gradients_outputs)
            gr.Button(value="Clear").click(fn=lambda: None)
            
        with gr.Column():
            gr.Markdown("### Contamination Predictions")
            for out in contamination_outputs:
                out.render()
                
        with gr.Column():
            gr.Markdown("### Gradients Predictions")
            for out in gradients_outputs:
                out.render()

demo.launch()