Patent ID: 11928825
Assignee: TSINGHUA UNIVERSITY
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 12:
13. The method according to claim 1, wherein the background weight difference has a formula of:, c
   
    i
    ⁢
    1
   
  
  =
  
   
    
     
      ∑
       
     
     
      
       a
       j
      
      =
      1
     
    
    ⁢
    
     G
     ⁡
     (
     
      T
      
       i
       ⁢
       j
      
     
     )
    
    ⁢
    
     
      (
      
       
        g
        i
       
       -
       
        g
        j
       
      
      )
     
     2
    
   
   
    
     
      ∑
       
     
     
      
       a
       j
      
      =
      1
     
    
    ⁢
    
     G
     ⁡
     (
     
      T
      
       i
       ⁢
       j
      
     
     )
    
   
  
 

where i represents a superpixel node i, ci1 represents a background weight difference between the superpixel node i and the virtual background node, aj=1 indicates that a superpixel node j belongs to the background and is the background superpixel node, G (x) represents a Gaussian function, Tij represents an element of a normalized expected round-trip time matrix T between the superpixel nodes i and j, gi represents a grayscale of the superpixel node i, and gj represents a grayscale of the superpixel node j.