import math
import os

import cva
import numpy as np

snake_case__						      =			255.0
def    __magic_name__(	__UpperCAmelCase			,    __UpperCAmelCase		)    ->     float:



      '''simple docstring'''

      _lowerCamelCase           =					np.mean((original - contrast) ** 2		)
      if mse == 0:
            return 100

      return 20 * math.logaa(PIXEL_MAX / math.sqrt(__UpperCAmelCase		)		)
def    __magic_name__(	)    ->     None:



      '''simple docstring'''

      _lowerCamelCase           =					os.path.dirname(os.path.realpath(__UpperCAmelCase		)		)
      # Loading images (original image and compressed image)
      _lowerCamelCase           =					cva.imread(os.path.join(__UpperCAmelCase			,    '''image_data/original_image.png'''		)		)
      _lowerCamelCase           =					cva.imread(os.path.join(__UpperCAmelCase			,    '''image_data/compressed_image.png'''		)			,    1		)

      _lowerCamelCase           =					cva.imread(os.path.join(__UpperCAmelCase			,    '''image_data/PSNR-example-base.png'''		)		)
      _lowerCamelCase           =					cva.imread(
          os.path.join(__UpperCAmelCase			,    '''image_data/PSNR-example-comp-10.jpg'''		)			,    1		)

      # Value expected: 29.73dB
      print('''-- First Test --'''		)
      print(F'PSNR value is {peak_signal_to_noise_ratio(__UpperCAmelCase			,    __UpperCAmelCase		)} dB'		)

      # # Value expected: 31.53dB (Wikipedia Example)
      print('''\n-- Second Test --'''		)
      print(F'PSNR value is {peak_signal_to_noise_ratio(__UpperCAmelCase			,    __UpperCAmelCase		)} dB'		)


if __name__ == "__main__":
     main()
from hashlib import mda, shaaaa

snake_case__						      =			(shaaaa, mda)



class 			UpperCamelCase					:

     '''simple docstring'''

     def __init__(       self					,					A_ = 8    )			->					None:






           """simple docstring"""
           _lowerCamelCase           =					0b0
           _lowerCamelCase           =					size



     def 		UpperCamelCase_    (       self					,					A_    )			->					None:






           """simple docstring"""
           _lowerCamelCase           =					self.hash_(A_    )
           self.bitarray |= h



     def 		UpperCamelCase_    (       self					,					A_    )			->					bool:






           """simple docstring"""
           _lowerCamelCase           =					self.hash_(A_    )
           return (h & self.bitarray) == h



     def __contains__(       self					,					A_    )			->					bool:






           """simple docstring"""
           return self.exists(A_    )



     def 		UpperCamelCase_    (       self					,					A_    )			->					str:






           """simple docstring"""
           _lowerCamelCase           =					bin(A_    )[2:]
           return res.zfill(self.size    )



     @property
     def 		UpperCamelCase_    (       self    )			->					str:






           """simple docstring"""
           return self.format_bin(self.bitarray    )



     def 		UpperCamelCase_    (       self					,					A_    )			->					int:






           """simple docstring"""
           _lowerCamelCase           =					0b0
           for func in HASH_FUNCTIONS:
                 _lowerCamelCase           =					(
                     int.from_bytes(func(value.encode()    ).digest()					,					'''little'''    ) % self.size
                 )
                 res |= 2**position
           return res



     def 		UpperCamelCase_    (       self					,					A_    )			->					str:






           """simple docstring"""
           return self.format_bin(self.hash_(A_    )    )





     @property
     def 		UpperCamelCase_    (       self    )			->					float:






           """simple docstring"""
           _lowerCamelCase           =					bin(self.bitarray    ).count('''1'''    )
           return (n_ones / self.size) ** len(A_    )