services/shadow_detection.py

import numpy as np
import cv2

def detect_shadow_coverage(image_path):
    image = cv2.imread(image_path)
    grayscale = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)
    shadow_ratio = (grayscale < 50).sum() / grayscale.size
    return shadow_ratio > 0.3  # Simulated threshold: >30% shadowed