Digital BW, The Print

Recently I got an error message when using the Piezography BW24Pro RIP. It said something about a "Pixel Professor Error" and could not continue printing. I re-booted my computer and all was well.

I believe that Piezography is using this program to create the "screen door" dither which looks surprisingly similar to the Iris Print dither pattern.

Regards,

Michael J. Kravit, AIA
Architect/Photographer
www.kravit.net/photography
  ----- Original Message ----- 
  From: Nij 
  To: DigitalBlackandWhiteThePrint@yahoogroups.com 
  Sent: Thursday, October 04, 2001 6:27 AM
  Subject: RE: [Digital BW] Re: Dithering THOUGHTS


  Guys,

  I don't have any major technical data, but here are a few thoughts for you,
  based on the last few posts on 'dithering'.
  I don't believe that Piezography uses variable dot sizes - that is, I do not
  believe it changes dot-sizes during a print. It may do so for different
  'quality' output settings. And it my use different dot-sizes for different
  printers at the same quality setting... which I think to get some of the
  extra performance of the newer machines.

  One of you mentioned 'curves' and I'd like to suggest that using that term
  is misleading (perhaps not entirely innacurate, but misleading). What _I_
  would do to print greyscale images using quads (using a program) is to map
  'image tones' to 'output tones' using some kind of map of which dither / dot
  / whatever pattern achieves that tone on a particular media. And, that may
  sound familiar to you - page 6 of the plugin manual shows the workflow...
  and I think this would come under 'QMM'. So, although it's a minor point, I
  see this as a once-off mapping, rather than applying curves to channels or
  anything like that some have used. Just my world view.

  Whichever way, hope the thought might be useful to you,
  Nij


  > -----Original Message-----
  > From: Tyler Boley [mailto:tyler@...]

  >
  > --- In DigitalBlackandWhiteThePrint@y..., "TerryR" <terryr1028@h...>
  > wrote:
  > snip...
  > the Piezo driver actually does the
  > > same thing in one row of nozzles that the Epson driver does in
  > > multiple rows while dithering. This allows the increase in dpi (at
  > > least in the older models). The Epson driver dithers intentionally
  > to
  > > hide the misalignment that may exist between the row of nozzles as
  > it
  > > progresses through the print as well as less than perfect feed. This
  > > may also partly explain the banding that takes place when the feed
  > is
  > > not dead on, since the dithering is not there to hide it.
  >
  > one more thing, as long as I'm clarifying my terminology. I always
  > thought what you describe above was "super microweave". No?
  >


        Yahoo! Groups Sponsor 
              ADVERTISEMENT
             
       
       

  Please visit the Group Homepage to check the Files, Bookmarks, Polls and other resources as they are often being updated. The page is at:

  http://groups.yahoo.com/group/DigitalBlackandWhiteThePrint

  Please follow these basic guidelines:
  - Include your full name with your message.
  - Include the address of your website, if you have one.
  - As threads develop, trim off excess portions of earlier messages to keep them short.
  - As the topic of a thread changes remember to change the subject header.
  - Good manners are required at all time. No personal attacks or "flames."
  - Complete your Yahoo profile.
  - Before posting a question, search the message archives and the various resources on the homepage. 




  Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. 



[Non-text portions of this message have been removed]