We have a 2 years old ticket about this:

  

      github.com/tensorflow/tfjs
  

  
    
  
	  
  

  
    
      CTC loss 2
    

    
      
        opened 
        
          
        
        Jul 19, 2019
      
      


      
        
          
          marsiancba
        
      
    

    
        
          type:feature
        
        
          P3
        
        
          stat:contributions welcome
        
    
  


  
    Please add support for CTC loss.

My use-case is recognizing handwritten numbe…rs (1-5 digits).