Patent ID: 11887284
Assignee: ZHEJIANG DAHUA TECHNOLOGY CO., LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 5:
6. The system of claim 5, wherein the exposure gain ratio is determined based on:, gain
        -
      
      ⁢
      a
    
    =
    
      
        
          
            
              y
              ⁢
              2
            
            
              n
              ⁢
              2
            
          
          -
          
            
              y
              ⁢
              1
            
            
              n
              ⁢
              1
            
          
        
        
          
            
              x
              ⁢
              2
            
            
              n
              ⁢
              2
            
          
          -
          
            
              x
              ⁢
              1
            
            
              n
              ⁢
              1
            
          
        
      
      =
      
        
          
            y
            ⁢
            
              2
              *
            
            ⁢
            n
            ⁢
            1
          
          -
          
            y
            ⁢
            
              1
              *
            
            ⁢
            n
            ⁢
            2
          
        
        
          
            x
            ⁢
            
              2
              *
            
            ⁢
            n
            ⁢
            1
          
          -
          
            x
            ⁢
            
              1
              *
            
            ⁢
            n
            ⁢
            2
          
        
      
    
  
  ,

wherein gain_a refers to the exposure gain ratio; n1 refers to the first count; n2 refers to the second count; y1 refers to the first statistic; x1 refers to the second statistic; y2 refers to the third statistic; and x2 refers to the fourth statistic.