使用json生成jpg，python代码

import json
import os
from glob import glob
from labelme import utils
from utils import *
import cv2


def run(json_list: list) -> None:
    for json_path in json_list:
        with open(json_path, 'r', encoding="utf-8") as f:
            data = json.load(f)
            imageData = data["imageData"]
            imagePath = data["imagePath"]
            img = utils.img_b64_to_arr(imageData)
            if img.shape[2] == 4:
                img = cv2.cvtColor(img, cv2.COLOR_RGBA2BGR)
            else:
                img = img[:, :, ::-1]

            img_save_path = os.path.join(image_dir, imagePath)
            suffix = os.path.splitext(imagePath)[-1]

            write(img_save_path, img, suffix)


def main() -> None:
    json_list = glob(f"{json_dir}\\*.*")

    run(json_list)


if __name__ == '__main__':
    root_dir = r"文件名"
    json_dir = os.path.join(root_dir, "1")
    image_dir = os.path.join(root_dir, "2")

    os.makedirs(image_dir, exist_ok=True)

    main()