Digital BW, The Print

When I resize an image downward, I always convert it to 16 bit first. Perhaps it does nothing, but then again, maybe there's benefit from the greater bit depth it it's calculations.

Jeffrey
http://www.happyeyeball.com

  ----- Original Message ----- 
  From: johngeyles 
  To: DigitalBlackandWhiteThePrint@yahoogroups.com 
  Sent: Monday, June 09, 2003 4:29 PM
  Subject: [Digital BW] Re: Working in 8 bit then converting to 16 bit??



  > 8 bit  to 16 bit conversion is so straightforward it's hard to
  > imagine why it would be better to do it before sending data to
  > OPM.   

  I am purely speculating here ... but one can imagine an 8bit->16bit
  conversion that is not quite as straightforward and might create
  a better image.  The idea would be to make the hi-byte of the 16bit
  value equal to the 8bit value, and then put a random value into
  the low-byte.   This has the effect of reducing "mock bands" at the
  transitions between the 256 values; it is frequently used in 
  computer image generation systems.  However, I'd be very surprised
  if Photoshop does this when you convert "mode" from 8bit to 16bit,
  in which case this wouldn't explain the supposed improvement from
  OPM when you give it 16bit images,

  John



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