用 PIL 放置像素会出错

Question

这里是新手。我试着用随机 RGB 颜色放置一些像素（比如添加噪声）：

from PIL import Image
import random
img=Image.open('pic.bmp')
randomenter=int(input('Enter numpix: '))
for numpix in range(0, randomenter):
    x=random.randint(0,int(img.size[0]))
    y=random.randint(0,int(img.size[1]))
    r=random.randint(0,255)
    g=random.randint(0,255)
    b=random.randint(0,255)
    img.putpixel((x,y),(r,g,b))
img.show()

与 randomenter=100 有时会起作用。较高的值会给我一个错误：

Traceback (most recent call last):
  File "D:\studysem\GiMS\labslaba3.py", line 11, in <module>
    img.putpixel((x,y),(r,g,b))
  File "C:\Python34\lib\site-packages\pillow-3.3.1-py3.4-win-amd64.egg\PIL\Image.py", line 1512, in putpixel
    return self.im.putpixel(xy, value)
IndexError: image index out of range

我做错了什么？图片 (800, 500) 值

Answer 1

如何发布@ŁukaszRogalsk，它通过将 x 和 y 编辑为 img.size[0]-1 和 img.size[1]-1

来解决

用 PIL 放置像素会出错

Putting pixels with PIL gives error

python

python-imaging-library