

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

from digital_image_processing.filters.convolve import img_convolve






def 		_A		(		_lowercase   )				->   Optional[Any]:


     """simple docstring"""


     __UpperCamelCase   = np.array([[-1, 0, 1], [-2, 0, 2], [-1, 0, 1]]   )
     __UpperCamelCase   = np.array([[1, 2, 1], [0, 0, 0], [-1, -2, -1]]   )

     __UpperCamelCase   = np.abs(img_convolve(_lowercase				,     _lowercase   )   )
     __UpperCamelCase   = np.abs(img_convolve(_lowercase				,     _lowercase   )   )
     # modify the pix within [0, 255]
     __UpperCamelCase   = dst_x * 2_55 / np.max(_lowercase   )
     __UpperCamelCase   = dst_y * 2_55 / np.max(_lowercase   )

     __UpperCamelCase   = np.sqrt((np.square(_lowercase   )) + (np.square(_lowercase   ))   )
     __UpperCamelCase   = dst_xy * 2_55 / np.max(_lowercase   )
     __UpperCamelCase   = dst_xy.astype(np.uinta   )

     __UpperCamelCase   = np.arctana(_lowercase				,     _lowercase   )
     return dst, theta


if __name__ == "__main__":
    # read original image
    __snake_case             =	imread('''../image_data/lena.jpg''')
    # turn image in gray scale value
    __snake_case             =	cvtColor(img, COLOR_BGR2GRAY)

    __snake_case       ,  __snake_case             =	sobel_filter(gray)

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






def 		_A		(		_lowercase   )				->   bool:


     """simple docstring"""


     if not isinstance(_lowercase				,     _lowercase   ):
          raise ValueError('Input series is not valid, valid series - [1, 2/3, 2]'   )
     if len(_lowercase   ) == 0:
          raise ValueError('Input list must be a non empty list'   )
     if len(_lowercase   ) == 1 and series[0] != 0:
          return True
     __UpperCamelCase   = []
     __UpperCamelCase   = len(_lowercase   )
     for i in range(0				,     _lowercase   ):
          if series[i] == 0:
               raise ValueError('Input series cannot have 0 as an element'   )
          rec_series.append(1 / series[i]   )
     __UpperCamelCase   = rec_series[1] - rec_series[0]
     for index in range(2				,     _lowercase   ):
          if rec_series[index] - rec_series[index - 1] != common_diff:
               return False
     return True






def 		_A		(		_lowercase   )				->   float:


     """simple docstring"""


     if not isinstance(_lowercase				,     _lowercase   ):
          raise ValueError('Input series is not valid, valid series - [2, 4, 6]'   )
     if len(_lowercase   ) == 0:
          raise ValueError('Input list must be a non empty list'   )
     __UpperCamelCase   = 0
     for val in series:
          answer += 1 / val
     return len(_lowercase   ) / answer


if __name__ == "__main__":
    import doctest

    doctest.testmod()


