

'''simple docstring'''





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

from digital_image_processing.filters.convolve import img_convolve


def 			__UpperCamelCase    (lowerCAmelCase					:  Optional[int]     )     ->  int:
      A    =				np.array([[-1, 0, 1], [-2, 0, 2], [-1, 0, 1]]     )
      A    =				np.array([[1, 2, 1], [0, 0, 0], [-1, -2, -1]]     )

      A    =				np.abs(img_convolve(__snake_case,    __snake_case     )     )
      A    =				np.abs(img_convolve(__snake_case,    __snake_case     )     )
      # modify the pix within [0, 255]
      A    =				dst_x * 255 / np.max(__snake_case     )
      A    =				dst_y * 255 / np.max(__snake_case     )

      A    =				np.sqrt((np.square(__snake_case     )) + (np.square(__snake_case     ))     )
      A    =				dst_xy * 255 / np.max(__snake_case     )
      A    =				dst_xy.astype(np.uinta     )

      A    =				np.arctana(__snake_case,    __snake_case     )
      return dst, theta


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

  _UpperCAmelCase	,						_UpperCAmelCase    	=			sobel_filter(gray)

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






def 			__UpperCamelCase    (lowerCAmelCase					:  int     )     ->  int:
      barcode //= 10  # exclude the last digit
      A    =				False
      A    =				0

      # extract and check each digit
      while barcode != 0:
            A    =				1 if checker else 3
            s += mult * (barcode % 10)
            barcode //= 10
            A    =				not checker

      return (10 - (s % 10)) % 10


def 			__UpperCamelCase    (lowerCAmelCase					:  int     )     ->  bool:
      return len(str(lowerCAmelCase     )     ) == 13 and get_check_digit(lowerCAmelCase     ) == barcode % 10


def 			__UpperCamelCase    (lowerCAmelCase					:  str     )     ->  int:
      if str(lowerCAmelCase     ).isalpha():
            A    =				f'''Barcode \'{barcode}\' has alphabetic characters.'''
            raise ValueError(lowerCAmelCase     )
      elif int(lowerCAmelCase     ) < 0:
            raise ValueError('The entered barcode has a negative value. Try again.'     )
      else:
            return int(lowerCAmelCase     )


if __name__ == "__main__":
  import doctest

  doctest.testmod()
  _UpperCAmelCase    	=			get_barcode(input("Barcode: ").strip())

  if is_valid(barcode):
    print(F'''\'{barcode}\' is a valid barcode.''')
  else:
    print(F'''\'{barcode}\' is NOT a valid barcode.''')



