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  1. Xref: sparky comp.graphics:9695 sci.image.processing:694
  2. Newsgroups: comp.graphics,sci.image.processing
  3. Path: sparky!uunet!gatech!darwin.sura.net!news.duc.auburn.edu!eng.auburn.edu!sjreeves
  4. From: sjreeves@eng.auburn.edu (Stan Reeves)
  5. Subject: Re: Reconstructing "Screened" Photos
  6. Message-ID: <sjreeves.920914100918@fourier.ee.eng.auburn.edu>
  7. Sender: usenet@news.duc.auburn.edu (News Account)
  8. Nntp-Posting-Host: fourier.ee.eng.auburn.edu
  9. Organization: Auburn University Engineering
  10. References: <1992Sep10.214544.15663@sctc.com>
  11. Date: Mon, 14 Sep 1992 15:09:18 GMT
  12. Lines: 28
  13.  
  14. In article <1992Sep10.214544.15663@sctc.com> boebert@sctc.com (Earl Boebert) writes:
  15. >Assume you had a series of photographs that had been printed using
  16. >letterpress technology some fifty years ago. This means that they
  17. >would have been "screened" into dots of some size like 1/100 of an
  18. >inch.  Further assume that you wanted to scan them into a computer and
  19. >applying appropriate image enhancement software to "unscreen" the
  20. >dots for modern reproduction.  If your machine was a 486 clone, what
  21. >scanner and software would you use?
  22.  
  23. More generally, what algorithm could be used?  The following reference is
  24. the only relevant one I've seen:
  25.  
  26. @Conference{analoui92,
  27.   author =  "M. Analoui and J. Allebach",
  28.   title =   "New Results on Reconstruction of Continuous-Tone from Halftone",
  29.   booktitle =   "1992 International Conference on Acoustics, Speech, and Signal 
  30. Processing",
  31.   pages =   "313-316"}
  32.  
  33. Anybody seen any others?  Earl, I'd like to know of any info you get via
  34. email.
  35.  
  36.  
  37.  
  38. --
  39. Stan Reeves
  40. Auburn University, Department of Electrical Engineering, Auburn, AL  36849
  41. INTERNET: sjreeves@eng.auburn.edu
  42.