April 19, 2005

The DV Guys: Live from NAB 2005

Tuesday NAB 2005 show featured (MP3) Steve Kilisky & Michael Kanfer from Adobe, and reps from ProMax, Gefen, Digidesign, Avid, and Autodesk.

Michael Kanfer is a new Adobe evangelist to the film community in LA, and has worked in post on major Hollywood movies and on Digital Intermediate (DI) processes at EFILM.


April 16, 2005

new AE plug-ins: Depth Cue

Buena Software has released new AE plug-ins: Depth Cue

The set, which includes 3D Composite, Depth, Fog, Falloff Lighting, and Rack Focus, provides a realistic depth effects that work with AE 3D layers.

AE Wiki is up and running

The AEWiki is up and running.

Based on and limited by MediaWiki, an open source wiki engine used to create the useful Wikipedia, it allows any user to post tips and tutorials.

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April 13, 2005

new Red Giant plug-ins

From MacNN.com and the AE-List:

Red Giant Software announced a new product today for NAB...

Key Correct Pro 1.0 ($400) is a new set of 17 plug-ins that lets
users correct alpha channel, create smooth outlines, and color match any two layers.

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Map Wars heat up

Google maps, based on technolgy from Keyhole, are fun! 

There's a sightseeing group, Google Sightseeing,
and there's even a site powered by Powered by craigslist
and Google Maps. What Microsoft and Yahoo are up to?
Flickr, Flickr, Flickr, where art thou tags going?

For this and more see an MS guy's blog, "Map Wars heat up."



April 11, 2005

Favicons

Favicons, the little icons next to the URL location in your
web browser, can be exported from PS with a Mac/Win plug-in from
http://www.telegraphics.com.au/sw/.

The cleanest discusion of it I saw of was at
http://www.golivein24.com/tips/favicon/.

The Religious Experience of Philip K. Dick

Philip K. Dick was a science fiction author whose writing has been getting the Hollywood treatment (Blade Runner, Total Recall, Screamers, Minority Report, Paycheck, and in 2006 A Scanner Darkly) since his death in 1982.

The Religious Experience of Philip K. Dick by R. Crumb is a cartoon version of PKD's "Valis" experience that was published in Weirdo #17 in 1986. See the Wikipedia PKD summary for more.

April 10, 2005

TotalTraining AE demonstration movies

You can find a bunch of TotalTraining movies and other tutorials at

http://studio.adobe.com
http://www.toolfarm.com/jezra/display.php
http://www.totaltraining.com

I'm repeating, but demonstration movies are very effective.


AE and HDR

New image formats can be confusing--do they mean bits per channel or bits per pixel? Video uses basically 3 color channels of 8 bits per pixel (2 to the 8th, 256, for 3 channels is 2 to the 24th or 24-bit, 16 millions colors bandwidth, and 32 bits with an alpha). Video is usually 8 bit, like DV formats, but higher end component/serial digital capture cards like DigitalVoodoo use higher bit depths.

Camera RAW images, perhaps used more than 16 bit or Cineon film scans by most AE users, have 12 or 14 bits per pixel recorded by the digital still cameras--which can be spread over a 16 bits in a Photoshop format or as an 8 bit JPEG with only 256 brightness levels. For more on camera raw and gamma, see the Adobe primers by Bruce Fraser. AE has long worked with Cineon files to simulate dynamic range, then added 16 bit linear color space, which has several benefits like reducing banding. 32 bit floating point preserves more detail, and recently the eLin plug-ins allow you to simulate the benefits of floating point in AE.

Much of visual effects work involves trying to make effects look “real” by capturing the real-world lighting with high dynamic range (HDR) photography techniques, often with different exposures. A great example is the web movie for "Acquiring the Reflectance Field of a Human Face" by Paul Debevec, et al. This stuff has been kicked around for years but ILM pushed Open Source code OpenEXR in 2003 and now all serious apps are supporting high dynamic range imaging. As Trish and Chris Meyer in Motion Graphics: A Different Light: "motion graphics artists--with their pursuit of surrealism--may find that breaking the rules yields a more interesting result." Yet, ready or not, Trish and Chris do show off gamma tricks and nudge us into a larger headspace. Stu Maschwitz also does this effectively in his demonstration movies to illustrate the power of HDR in the AE plug-in eLin.

For more info on gamma, see Digital Video and HDTV by Charles Poynton (see his website for free stuff); log and linear is discussed by Stu's ProLost, Mark Christiansen's Adobe After Effects 6.5 Studio Techniques, Steve Wright's Digital Compositing for Film and Video, Brinkmann's The Art and Science of Digital Compositing (Digital Compositing was once part of Shake docs). If you really want to know what float means, see What Every Computer Scientist Should Know About Floating-Point Arithmetic, by David Goldberg.

But "float" has costs: 32 bit float images require four times the memory and render times as 8-bit images, so most production is at lower bit depths. One wag on the AE-List (Mar 2005) added: "Of course, one can do this now in AE using Cineon/DPX out of a scanner or Spirit. The downside to comping in Log color space is that transparency and layer modes don't work properly, although they generally work good enough in most situations...my knock against working in linear float is that very few artists will look at the work at any other gamma, and high display gamma especially can hide quite large color errors near the black point. Working in log, using for instance the standard Cineon Linear Preview layer script, one tends to turn it on and off, and of course it renders off, so one typically sees the work in log before it goes to film. This is all my opinion, but doing DI [digital intermediates] we get to fix an awful lot of stuff that people screwed up in float because it looked fine on their 'calibrated' monitor [will Kodak Look and Display Manager propagate to the low end? -ed.]. That said, it has taken the facilities by storm in the last couple of years. We're getting looked down on like backward hayseeds with an ox-team for not ploughing with air-conditioned diesel tractor of float, where all problems are magically solved. As someone who believes in the value of creative cinematography, I also find the whole 'scene-referred' thing quite offensive, but that's just an implementation of OpenEXR, not HDR as a whole."