Untitled

    path = "paper-materials/presentation"

    img = cv2.imread(f"{path}/doge.jpg", -1) / 255.0
    h, w = img.shape[:-1]

    h //= 16
    w //= 16
    img = cv2.resize(img, (w, h))

    ratio = 2
    mask = np.zeros(img.shape, dtype=bool)
    mask[::ratio, ::ratio] = True

    masked_hr = img.copy()
    masked_hr[mask] = 0

    lr = cv2.resize(img[::ratio, ::ratio], (w, h), interpolation=cv2.INTER_NEAREST)
    masked_val = lr.copy()
    masked_val[mask] = 0

    save_img("dog_lr.png", path, img)
    save_img("lr.png", path, lr)
    save_img("mask.png", path, mask)
    save_img("masked_val.png", path, masked_val)
    save_img("onem_mask.png", path, 1 - mask)