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When a scanner cannot successfully decode a QR code. Common causes include insufficient quiet zone, low contrast, too-small module size, excessive damage beyond EC capacity, glare, and focus issues.


  



  

  
  
  
  

  
  
  
  

    
Связанные термины

    

      
      Quiet Zone
      
      Error Correction Level
      
      Contrast Ratio
      
    

  

  
  

  
  
  

    
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