from PIL import Image
from PIL import ImageDraw

img = Image.open('/Users/piv/Desktop/IMG_0818.png')

# Create a new image of the cutout.
blkimg = Image.new('1', (img.width, img.height)
blkdraw = ImageDraw.Draw(blkimg)

for i in range(1, img.width):
	for j in range(1, img.height):
		# getpixel returns tuple (r,g,b,a)
		pixel = img.getpixel((i, j))
		if (pixel[0]/pixel[1]) > 1.05 and (pixel[0]/pixel[1]) < 4: