Take two images and export frames fading between both images with a smooth transition

animated_fade.py

import imageio
import numpy as np

from_array = imageio.imread('Visualisation/pilbara/pilbara_before.png')
to_array = imageio.imread('Visualisation/pilbara/pilbara_after.png')

stacked_from_to = np.stack([to_array, from_array], axis=3)

weights = [0.2, 0.4, 0.6, 0.8, 1.0, 0.8, 0.6, 0.4, 0.2, 0]
milliseconds = [50, 50, 50, 50, 3500, 50, 50, 50, 50, 3500]

for i, weight in enumerate(weights):

    ave_from_to = np.average(stacked_from_to, axis=3, weights=np.array([weight, 1.0 - weight]))
    imageio.imwrite(f'Visualisation/pilbara/output_{i}_({milliseconds[i]}ms).png', ave_from_to.astype(np.uint8))