我尝试使用PIL放置像素（RGB像素），但始终失败

Question

I Try to using PIL.Image.putpixel(xy,color) ,But always fail. It's work for put singel channel graycolor PIL.Image.putpixel((x,y),255) But I want to put RGB color to this picture.

trackback -> TypeError: function takes exactly 1 argument (3 given)

Not: 123.jpg is grayscale picture.

Code Below:

from PIL import Image 
img = Image.open("123.jpg")
img.convert('RGB')
for x in range(img.size[0]):
    for y in range(img.size[1]):
        img.putpixel((x, y), (255, 255, 255))
img.save("temp.jpg")
img.show()

Answer 1

It should be

img.putpixel(...)

(Change im to img)

After correcting that, it should work.

Answer 2

The Image.convert() method returns an altered copy without changing the original, but you actually want to use the altered version, so replace:

from PIL import Image 
img = Image.open("123.jpg")
img.convert('RGB')

with

from PIL import Image 
img = Image.open("123.jpg").convert('RGB')