Optical White Balance - Andromeda at DVinfo.net

Go Back   DV Info Net > The Tools of DV and HD Production > Open DV Discussion

Open DV Discussion
For topics which don't fit into any of the other categories.


Reply
 
Thread Tools Search this Thread
Old March 6th, 2008, 12:26 PM   #1
New Boot
 
Join Date: Jul 2007
Location: Virginia
Posts: 8
Optical White Balance - Andromeda

This was shot using an Andromeda DVX100.

http://www.chrisnuzzaco.com/special_...filtertest.tif

That is a cropped screen shot from AE. I'm not sure how much information gets captured during a screen shot though, so it might not be a full 16 bit file, but its much nicer than the quicktime I compressed.

Remember to view with a proper gamma of 2.2, your browser might display it wrong.

This is an 8 bit Animation file, uncompressed. Remember... its 8 bit, I shot in 10 bit, so if you try to mess with this file, you are missing a full 2 bits of data (thats a lot of extra data), and this is already been tweaked by myself anyways.

About 220 MB:

http://www.chrisnuzzaco.com/special_...ilter_test.mov

For those wanting to give editing the footage a whack....

Uncompressed 16 bit tiff image file sequence 463 MB:

http://www.chrisnuzzaco.com/special_...ilter_test.zip

These frames were captured linearly at 10 bit, and rendered linearly into a 16 bit space, so the images will look dark on your average 2.2 gamma monitor, but all the data is there. It was also rendered without sharpening. I chose to use more advanced sharpening methods in After Effects, Sculptor HD's sharpening abilities are a bit rudimentary and they tend to accent signal noise. These frames have no lateral CA compensation applied either.

A little bit of information abut the shot:

This was shot using a special manual white balance setting I created that forces the blue and red channels to equal the green channels gain. Basically its a "uni-gain" setting. This effectively turns your camera into a Viper Filmstream like system, where optical white balance brings the best results. The camera is natively balanced for daylight, so I had to use an 80A filter on top of my 90ccM filter. If you load the frame into photo shop and isolate each channel, you will see that all three channels have the exact same amount of noise, which is very low, this is due to the optical white balance. The shot was rendered unsharpened. In After Effects I broke the shot up into individual channels and compensated for the lenses lateral CA, then I applied an unsharp mask to the footage, making sure to not accentuate signal noise. Sharpening is much easier when you have footage with a very low noise floor.

It looks even better when you see it play :)
__________________
Chris Nuzzaco - Director of Photography
www.chrisnuzzaco.com

Last edited by Chris Nuzzaco; March 6th, 2008 at 03:04 PM.
Chris Nuzzaco is offline   Reply With Quote
Old March 6th, 2008, 03:04 PM   #2
New Boot
 
Join Date: Jul 2007
Location: Virginia
Posts: 8
Image file sequence uploaded.
__________________
Chris Nuzzaco - Director of Photography
www.chrisnuzzaco.com
Chris Nuzzaco is offline   Reply With Quote
Old March 7th, 2008, 11:35 AM   #3
New Boot
 
Join Date: Jul 2007
Location: Virginia
Posts: 8
For those interested in seeing just how flexible the image is without downloading that huge zip folder:

Linear (unsharpened):

http://www.chrisnuzzaco.com/special_uploads/linear.tif

LOG/ "Viper" Like (unsharpened):

http://www.chrisnuzzaco.com/special_...shadowlift.tif
__________________
Chris Nuzzaco - Director of Photography
www.chrisnuzzaco.com
Chris Nuzzaco 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 > The Tools of DV and HD Production > Open DV Discussion

Thread Tools Search this Thread
Search this Thread:

Advanced Search

 



Google
 

All times are GMT -6. The time now is 06:47 PM.


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