Python PIL.Image基本方法：画布大小修改、拉伸、旋

读取图片

from PIL import Image
with Image.open(filename) as image:
  image.show()

修改图片大小：图片不变形

image = image.resize((w, h), Image.ANTIALIAS)

修改图片大小：拉伸、放大缩小

image = image.resize((w, h))

旋转

image = image.rotate(90)

明暗

image = image.point(lambda p: p * 1.3)

保存图片

image.save("test.jpg")

PIL.Image 转numpy.array

img = numpy.array(image)

numpy.array转 PIL.Image

image = Image.fromarray(img.astype('uint8')).convert('RGB')