



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

class 					lowercase						:




       '''simple docstring'''







       def __init__(						self		,       _snake_case		,       _snake_case   )					->		str:

           """simple docstring"""
           UpperCAmelCase     =    0
           # max greyscale value for #FFFFFF
           UpperCAmelCase     =    int(self.get_greyscale(255		,       255		,       255   )   )

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

           UpperCAmelCase     =    input_img
           UpperCAmelCase     =    threshold
           UpperCAmelCase     =    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
           UpperCAmelCase     =    [
               [0 for _ in range(self.height + 4   )] for __ in range(self.width + 1   )
           ]
           UpperCAmelCase     =    np.ones((self.width, self.height, 3)		,       np.uinta   ) * 255






       @classmethod
       def 				snake_case_ (						cls		,       _snake_case		,       _snake_case		,       _snake_case   )					->		Any:

           """simple docstring"""
           return 0.114 * blue + 0.587 * green + 0.2126 * red






       def 				snake_case_ (						self   )					->		Optional[Any]:

           """simple docstring"""
           for y in range(self.height   ):
               for x in range(self.width   ):
                   UpperCAmelCase     =    int(self.get_greyscale(*self.input_img[y][x]   )   )
                   if self.threshold > greyscale + self.error_table[y][x]:
                       UpperCAmelCase     =    (0, 0, 0)
                       UpperCAmelCase     =    greyscale + self.error_table[x][y]
                   else:
                       UpperCAmelCase     =    (255, 255, 255)
                       UpperCAmelCase     =    greyscale + self.error_table[x][y] - 255
                   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
    __magic_name__        =  [
        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()








from __future__ import annotations
def       UpperCamelCase__     (  SCREAMING_SNAKE_CASE__			,       SCREAMING_SNAKE_CASE__			,       SCREAMING_SNAKE_CASE__			,       SCREAMING_SNAKE_CASE__						):
 __lowerCamelCase					,     __lowerCamelCase		:							str							=						m - 1, 0
 while i >= 0 and j < n:
  if key == mat[i][j]:
   print(f'Key {key} found at row- {i + 1} column- {j + 1}'						)
   return
  if key < mat[i][j]:
   i -= 1
  else:
   j += 1
 print(f'Key {key} not found'						)
def       UpperCamelCase__     (  ):
 __lowerCamelCase		:							List[Any]							=						[[2, 5, 7], [4, 8, 13], [9, 11, 15], [12, 17, 20]]
 __lowerCamelCase		:							int							=						int(input('Enter the element to be searched:'						)						)
 print(SCREAMING_SNAKE_CASE__						)
 search_in_a_sorted_matrix(SCREAMING_SNAKE_CASE__			,       len(SCREAMING_SNAKE_CASE__						)			,       len(mat[0]						)			,       SCREAMING_SNAKE_CASE__						)


if __name__ == "__main__":
       import doctest

       doctest.testmod()
       main()

