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#!/usr/bin/env python3 # -*- coding: utf-8 -*- """ 一键生成“纯背景”COCO格式json（annotations为空） """ import os import json import glob from PIL import Image from datetime import datetime def generate_empty_coco_json(image_folder, output_json_path, start_image_id=500000): """ 将文件夹内所有图片写成COCO格式（无标注） :param image_folder: 纯背景图片目录 :param output_json_path: 输出json路径 :param start_image_id: 起始image_id，避免冲突 """ exts = ["*.jpg", "*.jpeg", "*.png", "*.bmp", "*.tif", "*.tiff"] image_files = [] for ext in exts: image_files.extend(glob.glob(os.path.join(image_folder, ext))) image_files.extend(glob.glob(os.path.join(image_folder, ext.upper()))) image_files = sorted(list(set(image_files))) if not image_files: print(f"× 在{image_folder}下未找到图片，请检查路径。") return print(f"√ 找到{len(image_files)}张背景图片，开始处理...") coco_output = { "info": { "description": "Empty Background Images for Negative Mining", "url": "", "version": "1.0", "year": datetime.now().year, "contributor": "User", "date_created": datetime.now().strftime("%Y-%m-%d %H:%M:%S") }, "licenses": [], "images": [], "annotations": [], # 关键：空列表 "categories": [] # 可留空，合并时以主文件为准 } for idx, img_path in enumerate(image_files): try: with Image.open(img_path) as img: width, height = img.size file_name = os.path.basename(img_path) image_info = { "id": start_image_id + idx, "file_name": file_name, "width": width, "height": height, "date_captured": datetime.now().strftime("%Y-%m-%d %H:%M:%S") } coco_output["images"].append(image_info) if (idx + 1) % 100 == 0: print(f"√ 已处理{idx + 1}张图片...") except Exception as e: print(f"× 无法读取图片{img_path}：{e}") os.makedirs(os.path.dirname(output_json_path), exist_ok=True) with open(output_json_path, 'w', encoding='utf-8') as f: json.dump(coco_output, f, indent=4, ensure_ascii=False) print(f"成功生成JSON文件：{output_json_path}") print(f"共包含{len(coco_output['images'])}张图片，0个标注。") if __name__ == "__main__": # ===== 按需改这两行 ===== IMAGE_DIR = r"C:\Users\11726\Desktop\pla\ao-90" # 纯背景图文件夹 OUTPUT_JSON = r"C:\Users\11726\Desktop\pla/empty_samples.json" START_ID = 500000 # 起始image_id # ======================= generate_empty_coco_json(IMAGE_DIR, OUTPUT_JSON, START_ID)