From: r_delaney2001@yahoo.com   
      
   At an image processing seminar last week, I saw a startling presentation.   
   The speaker noted that we cannot measure phase at optical wavelengths,   
   hence costs a major loss of information.  To illustrate, he displayed two   
   face photos, then swapped the phase, with no modification of the   
   magnitudes.  The faces switched places, with slight distortion!   He's   
   researching algorithms to recover phase.   
      
   Which made me wonder: what 's the highest frequency where we can   
   measure phase, and with what accuracy?   
      
   Also, a theoretical question manifests - why is it, that most of the   
   information is in the phase?    You'd expect 50-50.   
      
   --   
   Rich   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)