Patent ID: 11887279
Assignee: SHARIF UNIVERSITY OF TECHNOLOGY
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 5:
6. The method of claim 1, wherein minimizing the loss function comprises minimizing a total loss function defined by:

Ltotal=λ1L1+λ2L2+λ3L3+λ4L4,

where:, L
    1
   
   =
   
    
     1
     N
    
    ⁢
    
     
      ∑
      
       n
       =
       1
      
      N
     
      
     
      
       (
       
        
         
          I
          ^
         
         n
        
        -
         
        
         
          I
          ~
         
         n
        
       
       )
      
      2
     
    
   
  
  ,
 

Ĩn is an original array of size Nh×Nw×C associated with the nth original image,, L
       2
      
      =
      
       
        1
        N
       
       ⁢
       
        
         ∑
         
          n
          =
          1
         
         N
        
         
        
         
          ❘
          "\[LeftBracketingBar]"
         
         
          
           
            I
            ^
           
           n
          
          -
           
          
           
            I
            ~
           
           n
          
         
         
          ❘
          "\[RightBracketingBar]"
         
        
       
      
     
     ,
    
   
  
  
   
    
     
      
       L
       3
      
      =
      
       
        1
        N
       
       ⁢
       
        
         ∑
         
          n
          =
          1
         
         N
        
         
        
         
          ❘
          "\[LeftBracketingBar]"
         
         
          
           I
           n
          
          -
           
          
           
            I
            ^
           
           n
          
         
         
          ❘
          "\[RightBracketingBar]"
         
        
       
      
     
     ,
    
   
  
  
   
    
     
      
       L
       4
      
      =
      
       
        1
        N
       
       ⁢
       
        
         ∑
         
          n
          =
          1
         
         N
        
         
        
         
          1
          -
          
           SSIM
           ⁡
           (
           
            
             
              I
              ^
             
             n
            
            ,
             
            
             
              I
              ~
             
             n
            
           
           )
          
         
         2
        
       
      
     
     ,
    
   
  
 

SSIM(În, Ĩn) is a structural similarity index measure of the nth denoised training image and the nth original image, and
each of λ1, λ2, λ3, and λ4 is a respective non-negative coefficient.