On Thursday, September 20, 2018 at 3:21:29 PM UTC-4, shashidhar...@gmail.com   
   wrote:   
   > Super noob about optics, so forgive me if I make any mistakes. But I have   
   images from smartphones which have a color checker in them. I wish to   
   calculate the opto electronic function(can i use color checker for this?) so   
   that I can map my processed RGB    
   values onto linear scale ( rgb values before smartphone camera applies   
   processing).   
   >    
   > any advice/answer to clear what this is would tremendously help me out.   
   thanks!   
      
   thanks a lot! that made things clear!   
      
   Sincerely   
   Shashi   
      
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