我如何使用python將圖像轉換為灰度？

Question

我在文件夾中有 5 張圖片。 我想將所有圖像轉換為灰度。

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=colorIm.convert('L')

AttributeError: 'list' 對象沒有屬性 'convert'

Answer 1

您需要轉換列表中的每個圖像：

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]