一、创建输入文件夹（in）和输出文件夹（out），将原始图片放在输入文件夹（in）里

二、 安装对应的Python库

pip install Pillow

三、编写自动化脚本代码

import os
from PIL import Image

def crop_images_to_square(input_folder, output_folder):
    # Create output folder if it doesn't exist
    os.makedirs(output_folder, exist_ok=True)

    # Loop through all files in the input folder
    for filename in os.listdir(input_folder):
        if filename.lower().endswith(('.png', '.jpg', '.jpeg', '.gif', '.bmp')):
            # Open image
            img_path = os.path.join(input_folder, filename)
            with Image.open(img_path) as img:
                # Get dimensions
                width, height = img.size

                # Calculate the new size (the smaller dimension)
                new_size = min(width, height)

                # Calculate cropping box
                left = (width - new_size) / 2
                top = (height - new_size) / 2
                right = (width + new_size) / 2
                bottom = (height + new_size) / 2

                # Crop image
                img_cropped = img.crop((left, top, right, bottom))

                # Save the cropped image to the output folder
                img_cropped.save(os.path.join(output_folder, filename))
                print(f'Cropped and saved: {filename}')

if __name__ == '__main__':
    input_folder = r'C:\Users\Administrator\Desktop\r\in'  # Replace with your input folder path
    output_folder = r'C:\Users\Administrator\Desktop\r\out'  # Replace with your output folder path
    crop_images_to_square(input_folder, output_folder)

ps：input_folder为输入文件夹，output_folder为输出文件夹，需要注意的是如果是绝对路径，前面需要添加原始字符串r。

四、运行Python脚本，裁剪后的图片就保存在输出文件夹中

五、效果图

原图：

 

裁剪后：