删除图片背景：
https://www.remove.bg/zh
https://blog.csdn.net/m0_38106923/article/details/100130354#10%E3%80%81%E5%9C%A8%E7%BA%BF%E5%B7%A5%E5%85%B7%E5%AE%9D%E5%85%B8%E5%A4%A7%E5%85%A8