Python list以及numpy处理技巧

1.numpy数组后面添加一个list:

import numpy as np
a=[[1,2,3],[4,5,6],[7,8,9]]
box=np.array(a)
box=np.vstack((box,[10,11,12]))
x1=box[:,0]

print(box)

2.PIL库，读入灰度图二进制数据转为RGB：

imagePil = Image.frombytes('L', (originalImageWidth,originalImageHeight), imageSerialized).convert('RGB')