para ver. pic subtraction

mul.py

import multiprocessing
from multiprocessing import Pool

import cv2
import numpy as np
import ctypes

shared_array_base = multiprocessing.Array(ctypes.c_uint8, 1080*1920*3)
shared_array = np.ctypeslib.as_array(shared_array_base.get_obj())
shared_array = shared_array.reshape(1080, 1920, 3)

gray = cv2.imread('res34.png')

gray = cv2.cvtColor(gray, cv2.COLOR_BGR2GRAY)

result = cv2.Canny(gray, 200, 20)

img_none = cv2.imread('empty.png')



def f(x,y):
    if all(result[y,x] == (255,255,255)):
        if not all(img_none[y,x] == (255,255,255)):
            shared_array[y,x] = result[y,x]

r = [(x,y) for x in range(1920) for y in range(1080)]
p = Pool(8)

if __name__ == '__main__':
    print("2")
    p.starmap(f,r)
    
    print("1")
    cv2.imwrite('res33.png',shared_array)
    print("3")