dev(narugo): add laplacian score

from .aesthetic import *

from .ccip import *

from .dbaesthetic import *

from .laplacian import *

from .lpips import *

from .psnr_ import *

import cv2

import numpy as np

from ..data import load_image, ImageTyping

__all__ = [

    'laplacian_score'

]

def _variance_of_laplacian(d_image: np.ndarray):

    """

    Calculate the variance of Laplacian for a given image.

    :param d_image: The input image as a numpy array.

    :type d_image: np.ndarray

    :return: The variance of Laplacian.

    :rtype: float

    """

    return cv2.Laplacian(d_image, cv2.CV_64F).var()

def laplacian_score(image: ImageTyping) -> float:

    """

    Calculate the Laplacian score for the given image.

    The Laplacian score is a measure of image bluriness.

    :param image: The input image.

    :type image: ImageTyping

    :return: The Laplacian score.

    :rtype: float

    """

    v = np.array(load_image(image, force_background='white', mode='L'))

    return _variance_of_laplacian(v).item()