import cv2
import numpy as np

def detect_ball(frame):
    hsv = cv2.cvtColor(frame, cv2.COLOR_BGR2HSV)
    lower_red1 = np.array([0, 100, 100])
    upper_red1 = np.array([10, 255, 255])
    lower_red2 = np.array([160, 100, 100])
    upper_red2 = np.array([180, 255, 255])
    
    mask1 = cv2.inRange(hsv, lower_red1, upper_red1)
    mask2 = cv2.inRange(hsv, lower_red2, upper_red2)
    mask = mask1 | mask2
    
    contours, _ = cv2.findContours(mask, cv2.RETR_EXTERNAL, cv2.CHAIN_APPROX_SIMPLE)
    if contours:
        largest = max(contours, key=cv2.contourArea)
        (x, y), radius = cv2.minEnclosingCircle(largest)
        return (int(x), int(y))
    return None