批量将图片分别翻转90、180、270度，并将对应的框标注的json文件也进行相应调整，做到数据增强的效果

本文主要是介绍批量将图片分别翻转90、180、270度，并将对应的框标注的json文件也进行相应调整，做到数据增强的效果，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

#------------------------------------矩形标注增强---------------------------------------
from PIL import Image
import os
import jsondef rotate_images_and_jsons(input_folder):output_folder = os.path.join(input_folder, "rotated_images")os.makedirs(output_folder, exist_ok=True)for filename in os.listdir(input_folder):if filename.endswith(".jpg"):image_path = os.path.join(input_folder, filename)json_path = os.path.join(input_folder, filename.replace(".jpg", ".json"))# Load JSON datawith open(json_path, 'r', encoding='utf-8') as json_file:json_data = json.load(json_file)image = Image.open(image_path)# Rotate the image by 90, 180, and 270 degreesfor angle in [90, 180, 270]:rotated_image = image.rotate(angle, expand=True)# Save rotated images with a default quality valuerotated_image_path = os.path.join(output_folder, f"{os.path.splitext(filename)[0]}_{angle}.jpg")rotated_image.save(rotated_image_path, quality=160)# Update JSON data for rotated imagerotated_json_data = update_json_for_rotation(json_data, image.size, angle, os.path.basename(rotated_image_path))rotated_json_path = os.path.join(output_folder, f"{os.path.splitext(filename)[0]}_{angle}.json")with open(rotated_json_path, 'w', encoding='utf-8') as rotated_json_file:json.dump(rotated_json_data, rotated_json_file, indent=4, ensure_ascii=False)def update_json_for_rotation(json_data, image_size, angle, image_path):width, height = image_sizerotated_json_data = []for shape in json_data['shapes']:points = shape['points']rotated_points = []# 提取坐标信息point1_x, point1_y = points[0]point2_x, point2_y = points[1]if angle == 90:rotated_point1 = [point1_y, width - point1_x]rotated_point2 = [point2_y, width - point2_x]elif angle == 180:rotated_point1 = [width - point1_x, height - point1_y]rotated_point2 = [width - point2_x, height - point2_y]elif angle == 270:rotated_point1 = [height - point1_y, point1_x]rotated_point2 = [height - point2_y, point2_x]else:rotated_point = pointrotated_points.append(rotated_point1)rotated_points.append(rotated_point2)rotated_shape = {'label': shape['label'],'points': rotated_points,'group_id': shape['group_id'],'shape_type': shape['shape_type'],'flags': shape['flags']}rotated_json_data.append(rotated_shape)return {'version': json_data['version'], 'flags': json_data['flags'], 'shapes': rotated_json_data, 'imagePath': image_path, 'imageData': json_data['imageData'], 'imageHeight': json_data['imageHeight'], 'imageWidth': json_data['imageWidth']}# Replace 'input_folder' with your folder containing images and JSON files
rotate_images_and_jsons('./rectangles')