如何使用python将图像转换为灰度？

Question

我在文件夹中有5张图片。我想把所有这些图像都转换为灰度。import globcolorIm = []for filename in glob.glob('/content/drive/My Drive/Colab Notebooks/Asplab/Cifar/*.png'):  print(filename)  img = Image.open(filename)  colorIm.append(img)  greyIm=colorIm.convert('L')属性错误：“列表”对象没有属性“转换”

Answer 1

您需要转换列表中的每个图像：

import glob

colorIm = []

for filename in glob.glob('/content/drive/My Drive/Colab Notebooks/Asplab/Cifar/*.png'):

  print(filename)

  img = Image.open(filename)

  colorIm.append(img)

greyIm = [img.convert('L') for img in colorIm]