OpenCV截取指定图片区域

import cv2
img = cv2.imread('F:/2024/Python/demo1/test1/man.jpg')
cv2.imshow('Image', img)  # 显示图片
#cv2.waitKey(0)            # 等待按键x, y, w, h = 500, 100, 200, 200  # 示例坐标
roi = img[y:y+h, x:x+w]  # 截取指定区域
cv2.imshow('ROI', roi)  cv2.waitKey(0)  
cv2.destroyAllWindows()   # 关闭所有窗口