


import numpy as np
from cva import COLOR_BGR2GRAY, cvtColor, imread, imshow, waitKey

from digital_image_processing.filters.convolve import img_convolve

def  lowercase_						(						_A     :       Union[str, Any]		):

      """simple docstring"""




      lowerCamelCase__						:							List[Any]       =    np.array([[-1, 0, 1], [-2, 0, 2], [-1, 0, 1]]		)
      lowerCamelCase__						:							List[Any]       =    np.array([[1, 2, 1], [0, 0, 0], [-1, -2, -1]]		)

      lowerCamelCase__						:							Optional[int]       =    np.abs(img_convolve(_A       ,   _A		)		)
      lowerCamelCase__						:							Tuple       =    np.abs(img_convolve(_A       ,   _A		)		)
      # modify the pix within [0, 255]
      lowerCamelCase__						:							str       =    dst_x * 255 / np.max(_A		)
      lowerCamelCase__						:							Dict       =    dst_y * 255 / np.max(_A		)

      lowerCamelCase__						:							str       =    np.sqrt((np.square(_A		)) + (np.square(_A		))		)
      lowerCamelCase__						:							Optional[Any]       =    dst_xy * 255 / np.max(_A		)
      lowerCamelCase__						:							Tuple       =    dst_xy.astype(np.uinta		)

      lowerCamelCase__						:							Optional[Any]       =    np.arctana(_A       ,   _A		)
      return dst, theta


if __name__ == "__main__":
    # read original image
    A :       Dict						=   imread("../image_data/lena.jpg")
    # turn image in gray scale value
    A :       Optional[Any]						=   cvtColor(img, COLOR_BGR2GRAY)

    A,    A :       List[Any]						=   sobel_filter(gray)

    # show result images
    imshow("sobel filter", sobel_grad)
    imshow("sobel theta", sobel_theta)
    waitKey(0)






def  lowercase_						(						_A     :       int		):

      """simple docstring"""




      if not isinstance(_A       ,   _A		):
            raise ValueError("double_factorial() only accepts integral values"		)
      if num < 0:
            raise ValueError("double_factorial() not defined for negative values"		)
      lowerCamelCase__						:							Union[str, Any]       =    1
      for i in range(_A       ,   0       ,   -2		):
            value *= i
      return value


if __name__ == "__main__":
    import doctest

    doctest.testmod()


