




"""simple docstring"""






import copy
import os

import cva
import numpy as np
from matplotlib import pyplot as plt






class lowerCAmelCase__	:






			'''simple docstring'''



			def __init__(  self  ):
							_lowerCamelCase     :			List[Any]    =    ''
							_lowerCamelCase     :			Dict    =    ''
							_lowerCamelCase     :			Any    =    []
							_lowerCamelCase     :			Tuple    =    0
							_lowerCamelCase     :			Optional[int]    =    256
							_lowerCamelCase     :			Dict    =    0
							_lowerCamelCase     :			Union[str, Any]    =    0
							_lowerCamelCase     :			Tuple    =    0
							_lowerCamelCase     :			List[str]    =    0
			def 					A_    (  self  ,      lowercase  ):
							_lowerCamelCase     :			int    =    cva.imread(lowercase  ,      0  )
							_lowerCamelCase     :			int    =    copy.deepcopy(self.img  )
							_lowerCamelCase, _lowerCamelCase, _lowerCamelCase     :			Any    =    plt.hist(self.img.ravel()  ,      256  ,      [0, 256]  ,      label='x'  )
							_lowerCamelCase     :			Tuple    =    np.sum(lowercase  )
							for i in range(len(lowercase  )  ):
											_lowerCamelCase     :			Optional[int]    =    x[i] / self.k
											self.sk += prk
											_lowerCamelCase     :			List[str]    =    (self.L - 1) * self.sk
											if self.rem != 0:
															_lowerCamelCase     :			int    =    int(last % last  )
											_lowerCamelCase     :			Optional[int]    =    int(last + 1 if self.rem >= 0.5 else last  )
											self.last_list.append(lowercase  )
											_lowerCamelCase     :			int    =    int(np.ma.count(self.img  ) / self.img[1].size  )
											_lowerCamelCase     :			Tuple    =    self.img[1].size
							for i in range(self.number_of_cols  ):
											for j in range(self.number_of_rows  ):
															_lowerCamelCase     :			Optional[int]    =    self.img[j][i]
															if num != self.last_list[num]:
																			_lowerCamelCase     :			int    =    self.last_list[num]
							cva.imwrite('output_data/output.jpg'  ,      self.img  )
			def 					A_    (  self  ):
							plt.hist(self.img.ravel()  ,      256  ,      [0, 256]  )






			def 					A_    (  self  ):
							cva.imshow('Output-Image'  ,      self.img  )
							cva.imshow('Input-Image'  ,      self.original_image  )
							cva.waitKey(5000  )
							cva.destroyAllWindows()


if __name__ == "__main__":
			lowercase__     						=						os.path.join(os.path.basename(__file__), """image_data/input.jpg""")
			lowercase__     						=						ConstantStretch()
			stretcher.stretch(file_path)
			stretcher.plot_histogram()
			stretcher.show_image()





"""simple docstring"""






def      _snake_case			(				lowercase__		):
				if not isinstance(lowercase__							,    lowercase__		):
								raise ValueError('Input series is not valid, valid series - [2, 4, 6]'		)
				if len(lowercase__		) == 0:
								raise ValueError('Input list must be a non empty list'		)
				if len(lowercase__		) == 1:
								return True
				_lowerCamelCase     :			List[Any]    =    series[1] - series[0]
				for index in range(len(lowercase__		) - 1		):
								if series[index + 1] - series[index] != common_diff:
												return False
				return True







def      _snake_case			(				lowercase__		):
				if not isinstance(lowercase__							,    lowercase__		):
								raise ValueError('Input series is not valid, valid series - [2, 4, 6]'		)
				if len(lowercase__		) == 0:
								raise ValueError('Input list must be a non empty list'		)
				_lowerCamelCase     :			Optional[int]    =    0
				for val in series:
								answer += val
				return answer / len(lowercase__		)


if __name__ == "__main__":
			import doctest

			doctest.testmod()