

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






class     _UpperCAmelCase			:
			def __init__(		self      ,		_A      ,		_A     )    ->    Optional[int]:






				'''simple docstring'''







				_UpperCAmelCase    :							Optional[Any]									=					0
				# max greyscale value for #FFFFFF
				_UpperCAmelCase    :							Tuple									=					int(self.get_greyscale(2_55      ,		2_55      ,		2_55     )     )

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

				_UpperCAmelCase    :							Any									=					input_img
				_UpperCAmelCase    :							str									=					threshold
				_UpperCAmelCase						,   _UpperCAmelCase    :							Tuple									=					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    :							Optional[Any]									=					[
				    [0 for _ in range(self.height + 4     )] for __ in range(self.width + 1     )
				]
				_UpperCAmelCase    :							Optional[int]									=					np.ones((self.width, self.height, 3)      ,		np.uinta     ) * 2_55
			@classmethod
			def 							__snake_case (		cls      ,		_A      ,		_A      ,		_A     )    ->    float:






				'''simple docstring'''







				return 0.114 * blue + 0.587 * green + 0.2126 * red
			def 							__snake_case (		self     )    ->    None:






				'''simple docstring'''







				for y in range(self.height     ):
					for x in range(self.width     ):
						_UpperCAmelCase    :							Union[str, Any]									=					int(self.get_greyscale(*self.input_img[y][x]     )     )
						if self.threshold > greyscale + self.error_table[y][x]:
							_UpperCAmelCase    :							List[str]									=					(0, 0, 0)
							_UpperCAmelCase    :							List[Any]									=					greyscale + self.error_table[x][y]
						else:
							_UpperCAmelCase    :							List[Any]									=					(2_55, 2_55, 2_55)
							_UpperCAmelCase    :							List[Any]									=					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
						lowerCamelCase__				:  str													=  [
						    Burkes(imread('''image_data/lena.jpg''', 1), threshold)
						    for threshold in (1, 1_26, 1_30, 1_40)
						]

						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       UpperCamelCase					(			_lowerCAmelCase     :						int )				->			str:
	_UpperCAmelCase    :							Any									=					1
	_UpperCAmelCase    :							List[str]									=					0
	_UpperCAmelCase    :							str									=					1
	_UpperCAmelCase    :							Union[str, Any]									=					1
	_UpperCAmelCase    :							int									=					3
	_UpperCAmelCase    :							int									=					3
	_UpperCAmelCase    :							List[str]									=					limit
	_UpperCAmelCase    :							Optional[Any]									=					0

	_UpperCAmelCase    :							Any									=					""""""
	while counter != decimal + 1:
		if 4 * q + r - t < n * t:
			result += str(_lowerCAmelCase )
			if counter == 0:
				result += "."

			if decimal == counter:
				break

			counter += 1
			_UpperCAmelCase    :							str									=					10 * (r - n * t)
			_UpperCAmelCase    :							List[Any]									=					((10 * (3 * q + r)) // t) - 10 * n
			q *= 10
			_UpperCAmelCase    :							int									=					nr
		else:
			_UpperCAmelCase    :							Any									=					(2 * q + r) * l
			_UpperCAmelCase    :							str									=					(q * (7 * k) + 2 + (r * l)) // (t * l)
			q *= k
			t *= l
			l += 2
			k += 1
			_UpperCAmelCase    :							List[Any]									=					nn
			_UpperCAmelCase    :							Optional[int]									=					nr
	return result
def       UpperCamelCase					(			)				->			None:
	print(f'''{calculate_pi(50 ) = }''' )
	import doctest

	doctest.testmod()


if __name__ == "__main__":
						main()





