'''simple docstring'''




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





class        __magic_name__		:







			def __init__(      self							:    str							,     lowercase_							:    List[str]							,     lowercase_							:    int       ):
										lowercase_   :     int									=			0
										# max greyscale value for #FFFFFF
										lowercase_   :     List[Any]									=			int(self.get_greyscale(255							,     255							,     255       )       )

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

										lowercase_   :     Tuple									=			input_img
										lowercase_   :     str									=			threshold
										lowercase_		,		lowercase_   :     List[str]									=			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
										lowercase_   :     str									=			[
										    [0 for _ in range(self.height + 4       )] for __ in range(self.width + 1       )
										]
										lowercase_   :     Any									=			np.ones((self.width, self.height, 3)							,     np.uinta       ) * 255







			@classmethod
			def       SCREAMING_SNAKE_CASE_	(      cls							:    Optional[Any]							,     lowercase_							:    int							,     lowercase_							:    int							,     lowercase_							:    int       ):
										return 0.1_14 * blue + 0.5_87 * green + 0.21_26 * red







			def       SCREAMING_SNAKE_CASE_	(      self							:    int       ):






										for y in range(self.height       ):
																	for x in range(self.width       ):
																								lowercase_   :     int									=			int(self.get_greyscale(*self.input_img[y][x]       )       )
																								if self.threshold > greyscale + self.error_table[y][x]:
																															lowercase_   :     str									=			(0, 0, 0)
																															lowercase_   :     int									=			greyscale + self.error_table[x][y]
																								else:
																															lowercase_   :     Optional[int]									=			(255, 255, 255)
																															lowercase_   :     Union[str, Any]									=			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
						_lowercase		:					List[Any]													=		[
						    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 __snake_case (      UpperCamelCase    )       ->    float:


		"""simple docstring"""





		return -num if num < 0 else num

def __snake_case (      UpperCamelCase    )       ->    int:


		"""simple docstring"""





		if len(UpperCamelCase    ) == 0:
				raise ValueError('''abs_min() arg is an empty sequence'''    )
		a__   		=     x[0]
		for i in x:
				if abs_val(UpperCamelCase    ) < abs_val(UpperCamelCase    ):
						a__   		=     i
		return j

def __snake_case (      UpperCamelCase    )       ->    int:


		"""simple docstring"""





		if len(UpperCamelCase    ) == 0:
				raise ValueError('''abs_max() arg is an empty sequence'''    )
		a__   		=     x[0]
		for i in x:
				if abs(UpperCamelCase    ) > abs(UpperCamelCase    ):
						a__   		=     i
		return j

def __snake_case (      UpperCamelCase    )       ->    int:


		"""simple docstring"""





		if len(UpperCamelCase    ) == 0:
				raise ValueError('''abs_max_sort() arg is an empty sequence'''    )
		return sorted(UpperCamelCase						,					key=UpperCamelCase    )[-1]

def __snake_case (      )       ->    Optional[int]:


		"""simple docstring"""





		assert abs_val(0    ) == 0
		assert abs_val(34    ) == 34
		assert abs_val(-100_000_000_000    ) == 100_000_000_000

		a__   		=     [-3, -1, 2, -11]
		assert abs_max(UpperCamelCase    ) == -11
		assert abs_max_sort(UpperCamelCase    ) == -11
		assert abs_min(UpperCamelCase    ) == -1


if __name__ == "__main__":
					import doctest

					doctest.testmod()

					test_abs_val()
					print(abs_val(-34))  # --> 34




