图片裁剪指定矩形区域（Python）

from PIL import Imageimport osimport os.pathimport numpy as npimport cv2#指明被遍历的文件夹maindir = r'C:\\404\\OneDrive\\文档\\论文\\CCC\\comp_pic\\'for parent, dirnames, filenames in os.walk(maindir):#遍历每一张图片for filename in filenames:pic_name = os.path.join(parent, filename)img= Image.open(pic_name)_width, _height = img.sizeprint(_width,_height)caijian = img.crop((585,172,1355,942)) # 需要的范围(left, upper, right, lower)caijian.save(r"C:\\404\\OneDrive\\文档\\论文\\CCC\\cut"+'\\'+filename) #存储裁剪得到的图像,需要先创建文件夹