Tool to fake a bayer filter? at DVinfo.net

Go Back   DV Info Net > Cross-Platform Post Production Solutions > Digital Compositing and Effects

Digital Compositing and Effects
After Effects, Shake and everything else.


Reply
 
Thread Tools Search this Thread
Old July 13th, 2006, 07:52 PM   #1
Trustee
 
Join Date: Mar 2004
Location: Milwaukee, WI
Posts: 1,719
Tool to fake a bayer filter?

Anybody know which tool I could use to take an RGB rendered image from a 3D program and perform a bayer filter on it to try and match the footage from a camera that uses a bayer filter?
Thomas Smet is offline   Reply With Quote
Old July 14th, 2006, 12:05 AM   #2
Major Player
 
Join Date: Feb 2004
Location: Philadelphia, PA, USA
Posts: 548
Not sure that a Bayer filter effect would be a big help really.
The artifacts from DV compression, focus, CCD noise and lighting/dynamic range will generally outweigh the more subtle effects of a Bayer setup.

What software are you rendering from? What are you using to comp?
Can you post a still-frame of the "raw" CG render over the background video for review?
__________________
Nick Jushchyshyn Matchmoving, Compositing, TD
imdb
Nick Jushchyshyn is offline   Reply With Quote
Old July 14th, 2006, 12:07 AM   #3
Inner Circle
 
Join Date: Jun 2003
Location: Toronto, Canada
Posts: 4,750
Are you trying to match the Bayer artifacts specifically, or the overall look in general??? For the overall look, the Bayer artifacts probably only contribute a miniscule difference between the looks.

If you really wanted, a theoretical plug-in/program could convert your rendered image to a RAW format which you'd then de-mosaic. But this may not actually be what you're looking for (and I don't know of any such program).
Glenn Chan is offline   Reply With Quote
Old July 14th, 2006, 09:09 PM   #4
Trustee
 
Join Date: Mar 2004
Location: Milwaukee, WI
Posts: 1,719
I guess I am trying to figure out a way to match 3D with video shot with a bayer filter. When a bayer filter is used pixels are interpolated. I realize there are other factors that hurt the image quality and detail and I would like to deal with those as well. I'm using Shake and/or Combustion. The 3D is from 3D Studio Max 7. The problem I see with rendered images is that they just never take on the same look as the video they are composited with. A RGB rendered image with have every single pixel accurate. A bayer filter image will not. I'm hoping by dumbing down the perfect images they will blend a little bit better. If we cannot get perfect RGB images from cameras then the next best thing would be to make computer graphics look like it came from the same camera. I realize this may be overkill but I figured it was something I would like to experiment with to see how it turned out.

What program can I use to do a de-mosaic on an image?
Thomas Smet is offline   Reply With Quote
Old July 15th, 2006, 08:47 AM   #5
Major Player
 
Join Date: Feb 2004
Location: Philadelphia, PA, USA
Posts: 548
Quote:
Originally Posted by Thomas Smet
I guess I am trying to figure out a way to match 3D with video shot with a bayer filter.
In your Shake comp, I'd probably start by using a combination of the DeFocus, Pixelize and Grain filters (in the Filter Tab).

You may also consider the Sharpen node, since most consumer cameras apply their own sharpening filter to the CCD image before recording to tape and CG generally lacks the artifacts that result from this extra sharpening step (which should be applied after the blur).
__________________
Nick Jushchyshyn Matchmoving, Compositing, TD
imdb
Nick Jushchyshyn is offline   Reply
Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

Professional Video
(800) 833-4801
Portland, OR

B&H Photo Video
(866) 521-7381
New York, NY

Z.G.C.
(973) 335-4460
Mountain Lakes, NJ

Abel Cine Tech
(888) 700-4416
N.Y. NY & L.A. CA

Precision Camera
(800) 677-1023
Austin, TX

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > Cross-Platform Post Production Solutions > Digital Compositing and Effects

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 11:12 PM.


DV Info Net -- Real Names, Real People, Real Info!
1998-2017 The Digital Video Information Network