app.py

import gradio as gr
from ultralytics import YOLO
import cv2
import numpy as np
from PIL import Image, ImageDraw, ImageFont
import os
from pathlib import Path
import shutil
import tempfile

# Load YOLOv8 model
model = YOLO("best.pt")

# Create directories if not present
uploaded_folder = Path('Uploaded_Picture')
predicted_folder = Path('Predicted_Picture')
uploaded_folder.mkdir(parents=True, exist_ok=True)
predicted_folder.mkdir(parents=True, exist_ok=True)

# Global patient data list to accumulate HTML data
patient_data = []

def predict_image(input_image, name, age, medical_record, sex):
    if input_image is None:
        return None, "Please Input The Image"

    # Convert Gradio input image (PIL Image) to numpy array
    image_np = np.array(input_image)

    # Ensure the image is in the correct format
    if len(image_np.shape) == 2:  # grayscale to RGB
        image_np = cv2.cvtColor(image_np, cv2.COLOR_GRAY2RGB)
    elif image_np.shape[2] == 4:  # RGBA to RGB
        image_np = cv2.cvtColor(image_np, cv2.COLOR_RGBA2RGB)

    # Perform prediction
    results = model(image_np)

    # Draw bounding boxes and white circle on the image
    image_with_boxes = image_np.copy()
    raw_predictions = []

    if results[0].boxes:
        # Sort the results by confidence and take the highest confidence one
        highest_confidence_result = max(results[0].boxes, key=lambda x: x.conf.item())

        # Determine the label based on the class index
        class_index = highest_confidence_result.cls.item()
        if class_index == 0:
            label = "Immature"
            color = (0, 255, 255)  # Yellow for Immature
        elif class_index == 1:
            label = "Mature"
            color = (255, 0, 0)  # Red for Mature
        else:
            label = "Normal"
            color = (0, 255, 0)  # Green for Normal

        confidence = highest_confidence_result.conf.item()
        xmin, ymin, xmax, ymax = map(int, highest_confidence_result.xyxy[0])
        
        # Draw the bounding box
        cv2.rectangle(image_with_boxes, (xmin, ymin), (xmax, ymax), color, 2)

        # Draw the white circle in the center of the bounding box
        box_width = xmax - xmin
        box_height = ymax - ymin
        center_x = xmin + box_width // 2
        center_y = ymin + box_height // 2
        radius = int((box_width + box_height) / 2 / 12)
        cv2.circle(image_with_boxes, (center_x, center_y), radius, (255, 255, 255), 2)
        
        # Enlarge font scale and thickness
        font_scale = 1.0
        thickness = 2
        
        # Calculate label background size
        (text_width, text_height), baseline = cv2.getTextSize(f'{label} {confidence:.2f}', cv2.FONT_HERSHEY_SIMPLEX, font_scale, thickness)
        cv2.rectangle(image_with_boxes, (xmin, ymin - text_height - baseline), (xmin + text_width, ymin), (0, 0, 0), cv2.FILLED)
        
        # Put the label text with black background
        cv2.putText(image_with_boxes, f'{label} {confidence:.2f}', (xmin, ymin - 10), cv2.FONT_HERSHEY_SIMPLEX, font_scale, (255, 255, 255), thickness)
        
        raw_predictions.append(f"Label: {label}, Confidence: {confidence:.2f}, Box: [{xmin}, {ymin}, {xmax}, {ymax}]")

    raw_predictions_str = "\n".join(raw_predictions)
    
    # Convert to PIL image for further processing
    pil_image_with_boxes = Image.fromarray(image_with_boxes)

    # Add text and watermark
    pil_image_with_boxes = add_text_and_watermark(pil_image_with_boxes, name, age, medical_record, sex, label)
    
    # Save images to directories
    image_name = f"{name}-{age}-{sex}-{medical_record}.png"
    input_image.save(uploaded_folder / image_name)
    pil_image_with_boxes.save(predicted_folder / image_name)
    
    return pil_image_with_boxes, raw_predictions_str

# Function to add text and watermark
def add_text_and_watermark(image, name, age, medical_record, sex, label):
    draw = ImageDraw.Draw(image)
    
    # Load a larger font (adjust the size as needed)
    font_size = 24  # Example font size
    try:
        font = ImageFont.truetype("font.ttf", size=font_size)
    except IOError:
        font = ImageFont.load_default()
        print("Error: cannot open resource, using default font.")
    
    text = f"Name: {name}, Age: {age}, Medical Record: {medical_record}, Sex: {sex}, Result: {label}"
    
    # Calculate text bounding box
    text_bbox = draw.textbbox((0, 0), text, font=font)
    text_width, text_height = text_bbox[2] - text_bbox[0], text_bbox[3] - text_bbox[1]
    text_x = 20
    text_y = 40
    padding = 10

    # Draw a filled rectangle for the background
    draw.rectangle(
        [text_x - padding, text_y - padding, text_x + text_width + padding, text_y + text_height + padding],
        fill="black"
    )
    
    # Draw text on top of the rectangle
    draw.text((text_x, text_y), text, fill=(255, 255, 255, 255), font=font)

    return image

# Function to save patient info in HTML and accumulate data
def save_patient_info_to_html(name, age, medical_record, sex, result):
    global patient_data
    new_data = f"<p><strong>Name:</strong> {name}, <strong>Age:</strong> {age}, <strong>Medical Record:</strong> {medical_record}, <strong>Sex:</strong> {sex}, <strong>Result:</strong> {result}</p>"
    patient_data.append(new_data)

    html_content = f"""
    <html>
        <body>
            <h1>Patient Information</h1>
            {''.join(patient_data)}
        </body>
    </html>
    """
    
    # Save HTML content to file
    html_file_path = os.path.join(tempfile.gettempdir(), 'patient_info.html')
    with open(html_file_path, 'w') as f:
        f.write(html_content)
    
    return html_file_path

# Function to download the folders (fix: pass string path instead of Path object)
def download_folder(folder_path):
    zip_path = os.path.join(tempfile.gettempdir(), f"{Path(folder_path).name}.zip")
    
    # Zip the folder
    shutil.make_archive(zip_path.replace('.zip', ''), 'zip', folder_path)
    
    return zip_path

# Gradio Interface
with gr.Blocks() as demo:
    with gr.Column():
        gr.Markdown("# Cataract Detection System")
        gr.Markdown("Upload an image to detect cataract and add patient details.")
        gr.Markdown("This application uses YOLOv8 with mAP=0.981")
    
    with gr.Column():
        name = gr.Textbox(label="Name")
        age = gr.Number(label="Age")
        medical_record = gr.Number(label="Medical Record")
        sex = gr.Radio(["Male", "Female"], label="Sex")
        input_image = gr.Image(type="pil", label="Upload an Image", image_mode="RGB")

    with gr.Column():
        submit_btn = gr.Button("Submit")
        output_image = gr.Image(type="pil", label="Predicted Image")

    with gr.Row():
        raw_result = gr.Textbox(label="Prediction Result")
    
    with gr.Row():
        download_html_btn = gr.Button("Download Patient Information (HTML)")
        download_uploaded_btn = gr.Button("Download Uploaded Images")
        download_predicted_btn = gr.Button("Download Predicted Images")
    
    # Add file download output components for the uploaded and predicted images
    patient_info_file = gr.File(label="Patient Information HTML File")
    uploaded_folder_file = gr.File(label="Uploaded Images Zip File")
    predicted_folder_file = gr.File(label="Predicted Images Zip File")

    # Fix: pass string representation of Path objects
    submit_btn.click(fn=predict_image, inputs=[name, age, medical_record, sex, input_image], outputs=[output_image, raw_result])
    download_html_btn.click(fn=save_patient_info_to_html, inputs=[name, age, medical_record, sex, raw_result], outputs=patient_info_file)
    download_uploaded_btn.click(fn=download_folder, inputs=[str(uploaded_folder)], outputs=uploaded_folder_file)
    download_predicted_btn.click(fn=download_folder, inputs=[str(predicted_folder)], outputs=predicted_folder_file)

# Launch Gradio app
demo.launch()