lableme的 json （矩形框标注）转换为yolo 格式的txt --- (类别 x，y,w,h形式)

import json
import os

def convert_labelme_to_yolo(json_path, txt_path, label_dict):
    with open(json_path, 'r') as file:
        data = json.load(file)

    image_width = data['imageWidth']
    image_height = data['imageHeight']

    with open(txt_path, 'w') as file:
        for shape in data['shapes']:
            label = shape['label']
            points = shape['points']
            x_min, y_min = points[0]
            x_max, y_max = points[1]

            x_center = (x_min + x_max) / 2 / image_width
            y_center = (y_min + y_max) / 2 / image_height
            width = (x_max - x_min) / image_width
            height = (y_max - y_min) / image_height

            class_id = label_dict[label]
            file.write(f"{class_id} {x_center:.6f} {y_center:.6f} {width:.6f} {height:.6f}\n")

def batch_convert(input_folder, out