Patent ID: 11967152
Assignee: TENCENT TECHNOLOGY (SHENZHEN) COMPANY LIMITED
Field: Computer technology (Electrical engineering)
Classification: CPC G  Y | IPC G

Claim 1:
2. The video classification model construction method according to claim 1, wherein the prediction loss function comprises:, L
  =
  
   {
   
    
     
      
       
        -
        
         
          (
          
           1
           -
           
            y
            ′
           
          
          )
         
         γ
        
       
       ⁢
       log
       ⁢
       
        y
        ′
       
      
     
     
      
       y
       =
       1
      
     
    
    
     
      
       
        -
        
         y
         
          ′
          γ
         
        
       
       ⁢
       log
       ⁢
       
        (
        
         1
         -
         
          y
          ′
         
        
        )
       
      
     
     
      
       y
       =
       0
      
     
    
   
  
 

wherein y=1 represents that a training sample is a positive sample, y=0 represents that a training sample is a negative sample, y′ represents that a value range of a probability value outputted by the to-be-trained classification model is greater than or equal to 0 and less than or equal to 1 in a case that a training sample is a positive sample, and y is a preset value.