[Tig] Monochrome Cineon files & 2K/4K dirty scans with IR pass

[Bob Friesenhahn]

On Fri, 18 Aug 2006, Dan C. Tatut wrote:
>
> I just wanted to thank all those who kindly offered some help in the 
> search of some scans with IR pass. Also I take advantage of this 
> email to ask if some members can upload some of these images that 
> all the TIG users can use for testing thir tools, training, etc.
>
> We'll try to get some scans with IR pass and no limitation of usage. 
> When done, they'll be uploaded on TIG.

When you refer to scans with IR pass, are you talking about DPX files 
with an extra 1-bit "alpha" channel as recently introduced with the 
Northlight scanner, or are you talking about something else?

Unfortunately, this 1-bit "alpha" channel is encoded based on an array 
of 8-bit bytes (similar to TIFF) rather than 32-bit words so it does 
not actually conform to the DPX specification.

When I attended the HPA Tech Retreat I was given a demo of 
dust-busting using information from this extra channel and the results 
were quite impressive.

Bob
======================================
Bob Friesenhahn
bfriesen at simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/