[Python]使用Pillow，将图片由RGB转灰阶(Grayscale)

RGB -> Gray scale
Gray scale(灰阶影像)

from PIL import Imageimg2 = Image.open('GIF\\egg0.gif') #file pathimg2 = img2.convert('L') # convert to L (Grayscale)img2.save('GIF\\egg0_grayscale.gif') #file pathimg2.close()

原图(RGB)

灰阶(Gray Scale)

gray scale -> black and white picture(黑白图)

img2 = Image.open('GIF\\egg0_grayscale.gif') width , heigth = img2.size #取得图片的宽度 、高度img2 = img2.convert('L') for x in range(width):    for y in range(heigth):        if img2.getpixel((x,y)) >= 127:            img2.putpixel((x,y) , 255) #putpixel第一个参数是像素位置，第二个参数是要该像素变更的值，255(白色)        else:            img2.putpixel((x,y) , 0) #0(黑色)img2.save('GIF\\egg0_blackAndWhite.gif')        img2.show()img2.close()

黑白图black and white picture

https://pillow.readthedocs.io/en/stable/reference/Image.html