これをforじゃなくてnumpyで書いたらどうなるかわかる人教えて

test.py

#!python

import copy
import numpy as np

image = cv2.imread('x.png', cv2.IMREAD_UNCHANGED)
height, width = image.shape[:2]
cimage = np.empty((height, width, 3), dtype = np.uint8)
for h in range(height):
	for w in range(width):
		if image[h, w, 3] == 0:
			cimage[h, w] = [0x00, 0x00, 0x00]
		else:
			cimage[h, w] = image[h, w, 0:3]