






"""simple docstring"""


import numpy as np
from cva import destroyAllWindows, imread, imshow, waitKey


class  snake_case		:


   '''simple docstring'''

   def __init__(     self			:					Optional[int],	_lowerCamelCase			:					Any,	_lowerCamelCase			:					int  ):

     '''simple docstring'''
     __A						      =			0
     # max greyscale value for #FFFFFF
     __A						      =			int(self.get_greyscale(2_55,	2_55,	2_55  )  )

     if not self.min_threshold < threshold < self.max_threshold:
       __A						      =			f'Factor value should be from 0 to {self.max_threshold}'
       raise ValueError(_lowerCamelCase  )

     __A						      =			input_img
     __A						      =			threshold
     __A      ,   __A						      =			self.input_img.shape[1], self.input_img.shape[0]

     # error table size (+4 columns and +1 row) greater than input image because of
     # lack of if statements
     __A						      =			[
         [0 for _ in range(self.height + 4  )] for __ in range(self.width + 1  )
     ]
     __A						      =			np.ones((self.width, self.height, 3),	np.uinta  ) * 2_55


   @classmethod
   def     _SCREAMING_SNAKE_CASE    (     cls			:					Optional[Any],	_lowerCamelCase			:					int,	_lowerCamelCase			:					int,	_lowerCamelCase			:					int  ):

     '''simple docstring'''
     return 0.1_14 * blue + 0.5_87 * green + 0.21_26 * red






   def     _SCREAMING_SNAKE_CASE    (     self			:					Optional[Any]  ):

     '''simple docstring'''
     for y in range(self.height  ):
       for x in range(self.width  ):
         __A						      =			int(self.get_greyscale(*self.input_img[y][x]  )  )
         if self.threshold > greyscale + self.error_table[y][x]:
           __A						      =			(0, 0, 0)
           __A						      =			greyscale + self.error_table[x][y]
         else:
           __A						      =			(2_55, 2_55, 2_55)
           __A						      =			greyscale + self.error_table[x][y] - 2_55
         self.error_table[y][x + 1] += int(8 / 32 * current_error  )
         self.error_table[y][x + 2] += int(4 / 32 * current_error  )
         self.error_table[y + 1][x] += int(8 / 32 * current_error  )
         self.error_table[y + 1][x + 1] += int(4 / 32 * current_error  )
         self.error_table[y + 1][x + 2] += int(2 / 32 * current_error  )
         self.error_table[y + 1][x - 1] += int(4 / 32 * current_error  )
         self.error_table[y + 1][x - 2] += int(2 / 32 * current_error  )


if __name__ == "__main__":
       # create Burke's instances with original images in greyscale
       lowercase_    					=					[
           Burkes(imread('image_data/lena.jpg', 1), threshold)
           for threshold in (1, 126, 130, 140)
       ]

       for burkes in burkes_instances:
              burkes.process()

       for burkes in burkes_instances:
              imshow(
                  F'''Original image with dithering threshold: {burkes.threshold}''',
                  burkes.output_img,
              )

       waitKey(0)
       destroyAllWindows()












"""simple docstring"""


def  lowerCAmelCase    (   __UpperCamelCase			):




  """simple docstring"""







  if not isinstance(__UpperCamelCase		,	__UpperCamelCase			):
    raise ValueError('''Input series is not valid, valid series - [2, 4, 8]'''			)
  if len(__UpperCamelCase			) == 0:
    raise ValueError('''Input list must be a non empty list'''			)
  if len(__UpperCamelCase			) == 1:
    return True
  try:
    __A						      =			series[1] / series[0]
    for index in range(len(__UpperCamelCase			) - 1			):
      if series[index + 1] / series[index] != common_ratio:
        return False
  except ZeroDivisionError:
    return False
  return True



def  lowerCAmelCase    (   __UpperCamelCase			):




  """simple docstring"""







  if not isinstance(__UpperCamelCase		,	__UpperCamelCase			):
    raise ValueError('''Input series is not valid, valid series - [2, 4, 8]'''			)
  if len(__UpperCamelCase			) == 0:
    raise ValueError('''Input list must be a non empty list'''			)
  __A						      =			1
  for value in series:
    answer *= value
  return pow(__UpperCamelCase		,	1 / len(__UpperCamelCase			)			)


if __name__ == "__main__":
       import doctest

       doctest.testmod()




