Conversion between PIL and numpy formats

PIL is the most common image processing library in python, and format conversion between PIL and numpy arrays is often encountered in deep learning

PIL to numay conversion

from PIL import Image

img = Image.open("./hh.png")

img = np.array(img)

convert numay to PIL

from PIL import Image
import numpy as np

##生成一个随机数组

##randint()生成一定范围的数组
##random()生成0-1之间的均匀分布
##randn() 生成高斯分布
img=np.random.randint(0,255,(48,48))

img = Image.fromarray(img)
img.show()