Pillow transpose 图像上下、左右翻转

%matplotlib inline
from PIL import Image
import matplotlib.pyplot as plt

img = Image.open('image.png')

plt.imshow(img)

<matplotlib.image.AxesImage at 0x7f4631c95e80>

# 左右翻转
img_lr = img.transpose(Image.FLIP_LEFT_RIGHT)
plt.imshow(img_lr)

<matplotlib.image.AxesImage at 0x7f4619f05358>

# 上下翻转
img_lr = img.transpose(Image.FLIP_TOP_BOTTOM)
plt.imshow(img_lr)

<matplotlib.image.AxesImage at 0x7f4619eaacf8>

help(img.transpose)

Help on method transpose in module PIL.Image:

transpose(method) method of PIL.PngImagePlugin.PngImageFile instance
    Transpose image (flip or rotate in 90 degree steps)
    
    :param method: One of :py:attr:`PIL.Image.FLIP_LEFT_RIGHT`,
      :py:attr:`PIL.Image.FLIP_TOP_BOTTOM`, :py:attr:`PIL.Image.ROTATE_90`,
      :py:attr:`PIL.Image.ROTATE_180`, :py:attr:`PIL.Image.ROTATE_270`,
      :py:attr:`PIL.Image.TRANSPOSE` or :py:attr:`PIL.Image.TRANSVERSE`.
    :returns: Returns a flipped or rotated copy of this image.