



import math
import os

import cva
import numpy as np

a_								=   2_55.0





def 						a__     (						_UpperCamelCase     :	int	,_UpperCamelCase     :	Any							):
			__lowerCamelCase  							=      np.mean((original - contrast) ** 2							)
			if mse == 0:
						return 1_00

			return 20 * math.logaa(PIXEL_MAX / math.sqrt(_a							)							)





def 						a__     (						):
			__lowerCamelCase  							=      os.path.dirname(os.path.realpath(_a							)							)
			# Loading images (original image and compressed image)
			__lowerCamelCase  							=      cva.imread(os.path.join(_a	,'''image_data/original_image.png'''							)							)
			__lowerCamelCase  							=      cva.imread(os.path.join(_a	,'''image_data/compressed_image.png'''							)	,1							)

			__lowerCamelCase  							=      cva.imread(os.path.join(_a	,'''image_data/PSNR-example-base.png'''							)							)
			__lowerCamelCase  							=      cva.imread(
			    os.path.join(_a	,'''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(_a	,_a							)} dB"""							)

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


if __name__ == "__main__":
		main()











def 						a__     (						_UpperCamelCase     :	int							):
   if not isinstance(_UpperCamelCase	,_UpperCamelCase							):
      __lowerCamelCase  							=      (
          '''operation can not be conducted on a object of type '''
          F"""{type(_UpperCamelCase							).__name__}"""
      )
      raise TypeError(_UpperCamelCase							)
   __lowerCamelCase  							=      ''''''
   for _ in range(0	,32							):
      bit_string += str(number % 2							)
      __lowerCamelCase  							=      number >> 1
   return bit_string





def 						a__     (						_UpperCamelCase     :	int							):
   if number < 0:
      raise ValueError('''the value of input must be positive'''							)
   elif isinstance(_UpperCamelCase	,_UpperCamelCase							):
      raise TypeError('''Input value must be a \'int\' type'''							)
   elif isinstance(_UpperCamelCase	,_UpperCamelCase							):
      raise TypeError('''\'<\' not supported between instances of \'str\' and \'int\''''							)
   __lowerCamelCase  							=      0
   # iterator over [1 to 32],since we are dealing with 32 bit integer
   for _ in range(1	,33							):
      # left shift the bits by unity
      __lowerCamelCase  							=      result << 1
      # get the end bit
      __lowerCamelCase  							=      number % 2
      # right shift the bits by unity
      __lowerCamelCase  							=      number >> 1
      # add that bit to our ans
      __lowerCamelCase  							=      result | end_bit
   return get_reverse_bit_string(_UpperCamelCase							)


if __name__ == "__main__":
  import doctest

  doctest.testmod()






