"""simple docstring"""




from __future__ import annotations

from typing import Generic, TypeVar

__lowerCAmelCase    :							int													=						TypeVar("T")

class       a_      (     Generic[T]			):




					def __init__(	self						:     List[Any]  ,						snake_case__						:     T     ):
							lowerCAmelCase__        =   data
							lowerCAmelCase__        =   self
							lowerCAmelCase__        =   0

class       a_      (     Generic[T]			):




					def __init__(	self						:     Optional[int]     ):
							# map from node name to the node object
							lowerCAmelCase__        =   {}




					def 						_SCREAMING_SNAKE_CASE						(	self						:     List[Any]  ,						snake_case__						:     T     ):
							# create a new set with x as its member
							lowerCAmelCase__        =   DisjointSetTreeNode(snake_case__     )




					def 						_SCREAMING_SNAKE_CASE						(	self						:     List[Any]  ,						snake_case__						:     T     ):
							# find the set x belongs to (with path-compression)
							lowerCAmelCase__        =   self.map[data]
							if elem_ref != elem_ref.parent:
									lowerCAmelCase__        =   self.find_set(elem_ref.parent.data     )
							return elem_ref.parent




					def 						_SCREAMING_SNAKE_CASE						(	self						:     str  ,						snake_case__						:     DisjointSetTreeNode[T]  ,						snake_case__						:     DisjointSetTreeNode[T]     ):
							# helper function for union operation
							if nodea.rank > nodea.rank:
									lowerCAmelCase__        =   nodea
							else:
									lowerCAmelCase__        =   nodea
									if nodea.rank == nodea.rank:
											nodea.rank += 1




					def 						_SCREAMING_SNAKE_CASE						(	self						:     List[str]  ,						snake_case__						:     T  ,						snake_case__						:     T     ):
							# merge 2 disjoint sets
							self.link(self.find_set(snake_case__     )  ,						self.find_set(snake_case__     )     )

class       a_      (     Generic[T]			):




					def __init__(	self						:     List[Any]     ):
							# connections: map from the node to the neighbouring nodes (with weights)
							lowerCAmelCase__        =   {}




					def 						_SCREAMING_SNAKE_CASE						(	self						:     str  ,						snake_case__						:     T     ):
							# add a node ONLY if its not present in the graph
							if node not in self.connections:
									lowerCAmelCase__        =   {}




					def 						_SCREAMING_SNAKE_CASE						(	self						:     List[str]  ,						snake_case__						:     T  ,						snake_case__						:     T  ,						snake_case__						:     int     ):
							# add an edge with the given weight
							self.add_node(snake_case__     )
							self.add_node(snake_case__     )
							lowerCAmelCase__        =   weight
							lowerCAmelCase__        =   weight




					def 						_SCREAMING_SNAKE_CASE						(	self						:     List[Any]     ):
							lowerCAmelCase__        =   []
							lowerCAmelCase__        =   set()
							for start in self.connections:
									for end in self.connections[start]:
											if (start, end) not in seen:
													seen.add((end, start)     )
													edges.append((start, end, self.connections[start][end])     )
							edges.sort(key=lambda snake_case__     : x[2]     )

							# creating the disjoint set
							lowerCAmelCase__        =   DisjointSetTree[T]()
							for node in self.connections:
									disjoint_set.make_set(snake_case__     )

							# MST generation
							lowerCAmelCase__        =   0
							lowerCAmelCase__        =   0
							lowerCAmelCase__        =   GraphUndirectedWeighted[T]()
							while num_edges < len(self.connections     ) - 1:
									lowerCAmelCase__   ,					lowerCAmelCase__   ,					lowerCAmelCase__        =   edges[index]
									index += 1
									lowerCAmelCase__        =   disjoint_set.find_set(snake_case__     )
									lowerCAmelCase__        =   disjoint_set.find_set(snake_case__     )
									if parent_u != parent_v:
											num_edges += 1
											graph.add_edge(snake_case__  ,						snake_case__  ,						snake_case__     )
											disjoint_set.union(snake_case__  ,						snake_case__     )
							return graph






"""simple docstring"""




import copy
import os

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

class       a_      :




					def __init__(	self						:     Optional[int]     ):
							lowerCAmelCase__        =   """"""
							lowerCAmelCase__        =   """"""
							lowerCAmelCase__        =   []
							lowerCAmelCase__        =   0
							lowerCAmelCase__        =   256
							lowerCAmelCase__        =   0
							lowerCAmelCase__        =   0
							lowerCAmelCase__        =   0
							lowerCAmelCase__        =   0




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




					def 						_SCREAMING_SNAKE_CASE						(	self						:     Optional[Any]     ):
							plt.hist(self.img.ravel()  ,						256  ,						[0, 256]     )




					def 						_SCREAMING_SNAKE_CASE						(	self						:     Optional[Any]     ):
							cva.imshow("""Output-Image"""  ,						self.img     )
							cva.imshow("""Input-Image"""  ,						self.original_image     )
							cva.waitKey(5000     )
							cva.destroyAllWindows()


if __name__ == "__main__":
			__lowerCAmelCase    :							Dict													=						os.path.join(os.path.basename(__file__), "image_data/input.jpg")
			__lowerCAmelCase    :							Optional[int]													=						ConstantStretch()
			stretcher.stretch(file_path)
			stretcher.plot_histogram()
			stretcher.show_image()




