Counts background pixels in an image

image.py

#!/usr/bin/env python
from PIL import Image
image = Image.open("image.jpg")
bg = image.getpixel((0,0))
width, height = image.size
bg_count = next(n for n,c in image.getcolors(width*height) if c==bg)
img_count = width*height - bg_count
img_percent = img_count*100.0/width/height
print(img_percent)