python代码，用于从image-net.org下载图像以进行haar级联训练

import urllib.request

def download_images(url_file, save_dir):
    with open(url_file, 'r') as file:
        urls = file.readlines()
        for i, url in enumerate(urls):
            try:
                urllib.request.urlretrieve(url.strip(), f"{save_dir}/image_{i}.jpg")
                print(f"Downloaded image {i+1}/{len(urls)}")
            except Exception as e:
                print(f"Failed to download image {i+1}: {str(e)}")

url_file = "image_urls.txt"  # 存储图像URL的文件路径
save_dir = "images"  # 图像保存目录

download_images(url_file, save_dir)