app.py

# -*- coding: utf-8 -*-
"""
Created on Wed Nov 13 18:37:31 2024

@author: sabar
"""

import gradio as gr
import cv2
import numpy as np
import os
import json
from openvino.runtime import Core  # Assuming you're using OpenVINO
from tqdm import tqdm
from tf_post_processing import non_max_suppression #,optimized_object_detection

# Load the OpenVINO model
classification_model_xml = "./model/best_openvino_model\best.xml"
core = Core()
config = {
    "INFERENCE_NUM_THREADS": 2,
    "ENABLE_CPU_PINNING": True
}
model = core.read_model(model=classification_model_xml)
compiled_model = core.compile_model(model=model, device_name="CPU", config=config)

# Function to perform inference
def predict_image(image):
    # Resize, preprocess, and reshape the input image
    img_size = 960
    resized_image = cv2.resize(image, (img_size, img_size)) / 255.0
    resized_image = resized_image.transpose(2, 0, 1)
    reshaped_image = np.expand_dims(resized_image, axis=0).astype(np.float32)
    
    im_height, im_width, _ = image.shape
    output_numpy = compiled_model(reshaped_image)[0]
    results = non_max_suppression(output_numpy, conf_thres=0.2, iou_thres=0.6, max_wh=15000)[0]

    # Prepare output paths
    output_path = "D:/Research/Auto_CAD_detection/output_file_train/"
    output_image_folder = os.path.join(output_path, "images_alienware_openvino/")
    os.makedirs(output_image_folder, exist_ok=True)

    output_json_folder = os.path.join(output_path, "json_output/")
    os.makedirs(output_json_folder, exist_ok=True)
    
    predictions = []

    # Draw boxes and collect prediction data
    for result in results:
        boxes = result[:4]
        prob = result[4]
        classes = int(result[5])

        x1, y1, x2, y2 = np.uint16([
            boxes[0] * im_width,
            boxes[1] * im_height,
            boxes[2] * im_width,
            boxes[3] * im_height
        ])

        if prob > 0.2:
            cv2.rectangle(image, (x1, y1), (x2, y2), (255, 255, 0), 2)
            label_text = f"{classes} {round(prob, 2)}"
            cv2.putText(image, label_text, (x1, y1), 0, 0.5, (0, 255, 0), 2)

            # Store prediction info in a JSON-compatible format
            predictions.append({
                "class": classes,
                "probability": round(float(prob), 2),
                "coordinates": {
                    "xmin": int(x1),
                    "ymin": int(y1),
                    "xmax": int(x2),
                    "ymax": int(y2)
                }
            })

    # Save the processed image and JSON file
    output_image_path = os.path.join(output_image_folder, "result_image.jpg")
    cv2.imwrite(output_image_path, image)

    output_json_path = os.path.join(output_json_folder, "predictions.json")
    with open(output_json_path, 'w') as f:
        json.dump(predictions, f, indent=4)

    return output_image_path, predictions

# Set up Gradio interface
def gradio_interface(image):
    output_image_path, predictions = predict_image(image)
    return output_image_path, json.dumps(predictions, indent=4)

# Launch the Gradio app
gr.Interface(
    fn=gradio_interface,
    inputs="image",
    outputs=["image", "json"],
    title="OpenVINO Model Inference with Gradio",
    description="Upload an image to get model predictions with bounding boxes and probabilities."
).launch()