

import math
import os

import cva
import numpy as np

lowerCAmelCase						:   str										=    255.0





def 			_lowercase    (      __UpperCamelCase     :		float   ,       __UpperCamelCase     :		float ):
      snake_case__					=   np.mean((original - contrast) ** 2 )
      if mse == 0:
            return 100

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





def 			_lowercase    (      ):
      snake_case__					=   os.path.dirname(os.path.realpath(__UpperCamelCase ) )
      # Loading images (original image and compressed image)
      snake_case__					=   cva.imread(os.path.join(__UpperCamelCase   ,       """image_data/original_image.png""" ) )
      snake_case__					=   cva.imread(os.path.join(__UpperCamelCase   ,       """image_data/compressed_image.png""" )   ,       1 )

      snake_case__					=   cva.imread(os.path.join(__UpperCamelCase   ,       """image_data/PSNR-example-base.png""" ) )
      snake_case__					=   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()








import sys





def 			_lowercase    (      __UpperCamelCase     :		int   ,       __UpperCamelCase     :		list[int] ):
      if not numbers:
            return 0
      if target == 0 and target in numbers:
            return 0
      if not isinstance(__UpperCamelCase   ,       (list, tuple) ) or not all(
          isinstance(__UpperCamelCase   ,       __UpperCamelCase ) for number in numbers ):
            raise ValueError("""numbers must be an iterable of integers""" )

      snake_case__					=   snake_case__					=   snake_case__					=   0
      snake_case__					=   sys.maxsize

      while right < len(__UpperCamelCase ):
            curr_sum += numbers[right]
            while curr_sum >= target and left <= right:
                  snake_case__					=   min(__UpperCamelCase   ,       right - left + 1 )
                  curr_sum -= numbers[left]
                  left += 1
            right += 1

      return 0 if min_len == sys.maxsize else min_len






