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Andromeda DVX100 Optical White Balance


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#1 Chris Nuzzaco

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Posted 06 March 2008 - 12:55 PM

http://www.chrisnuzz.../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.chrisnuzz...filter_test.mov

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

Uncompressed 16 bit tiff image file sequence.

LINK UPLOADING

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 :)
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#2 Chris Nuzzaco

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Posted 06 March 2008 - 03:38 PM

Like many other people here... I can't figure out how to edit my posts! LOL

Here is the image file sequence (source footage for the clips). Its big and beefy... 463MB:

http://www.chrisnuzz...filter_test.zip
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#3 Chris Nuzzaco

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Posted 07 March 2008 - 12:09 PM

For those interested in seeing just how flexible the image is without downloading that huge zip folder:

Linear (unsharpened):

http://www.chrisnuzz...oads/linear.tif

LOG/ "Viper" Like (unsharpened):

http://www.chrisnuzz.../shadowlift.tif
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