import numpy as np
from PIL import Image, ImageDraw
img=Image.open("img.jpg")
display(img)
height,width = img.size
lum_img = Image.new('L', [height,width] , 0)
draw = ImageDraw.Draw(lum_img)
draw.pieslice([(0,0), (height,width)], 0, 360,
fill = 255, outline = "white")
img_arr =np.array(img)
lum_img_arr =np.array(lum_img)
display(Image.fromarray(lum_img_arr))
final_img_arr = np.dstack((img_arr,lum_img_arr))
display(Image.fromarray(final_img_arr))