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

[Dan C. Tatut]

Yes Bob, that's exactly it.

The FilmLight's way of storing data in the DPX file may not be fully DPX by-the-book compliant, however, they give you a way to test for their implementation and treat it as a special case.

Also there are other scanners that generate the dirt mask in a regular DPX alpha channel. Each company/manufacturer that has the IR technology may have its implementation for the storage. Unfortunately, Kodak's patent (and cost!) is preventing a lot of companies from integrating the technology in their scanners. 

We just finished our automated tool for IR-based dust busting and yes, the results are impressing. All this will be shown at the IBC but.. that should go on another page :)

Best, Dan

Dan Tatut
CEO
CHROME Imaging
105 Rue de Lyon
CH-1203 Geneva
Switzerland

Phone: +41 22 807 23 60
Fax: +41 22 807 23 70
Mobile: +41 78 659 11 04
WWW: http://www.chrome-imaging.com


-----Original Message-----
From: Bob Friesenhahn [mailto:bfriesen at simple.dallas.tx.us]
Sent: vendredi, 18. août 2006 18:53
To: Dan C. Tatut
Cc: tig at colorist.org
Subject: Re: [Tig] Monochrome Cineon files & 2K/4K dirty scans with IR
pass


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/