[Bf-vfx] Plane Tracking naming

[Sean Kennedy]

Yes, but as Keir just pointed out, it is actually doing the same thing under the hood. 
I guess I'm more talking about the user end of it. In the compositor, using the data, it's a corner pin. Which is similar to Mocha's functionality - by the time you bring Mocha's track into After Effects or Nuke, you're applying it by pasting the data into a corner pin tool. Even though the tech to get the result was a planar track, you're applying it as a corner pin.
Saying "expectations for planar tracking are set by Mocha" sounds so definitive, and implies no one else can have a say, but the fact of the matter is that they have made their mark. They brought this technology to the forefront of the vfx industry and as it becomes more and more widely used, because they are the only people out there with it (until now, anyway), then yes, it does appear that they are setting the expectations. In the same way that most compositing tasks in the vfx field are currently defined by Nuke and it's predecessors. 
I don't think it's a huge deal, but I've already had to explain it to a few industry people who were expecting it to be like Mocha. Just trying to catch it while it's yet to be released out into the wild.
From: davidj at gmail.com
Date: Mon, 12 Aug 2013 20:01:17 -0700
To: bf-vfx at blender.org
Subject: Re: [Bf-vfx] Plane Tracking naming

On Mon, Aug 12, 2013 at 7:45 PM, Keir Mierle <mierle at gmail.com> wrote:


I am aware of this thread guys, and will comment in a day or so; currently swamped on other fronts. The tracker DOES track a plane by solving for a plane implied by 4 or more tracks.


I see. If I understand the conversation correctly, Sean's point is that this functionality does not meet the VFX industry expectation for "planar tracking", and that it should be called corner-pinning instead. Did I get that right Sean?


Expectations for "planar tracking" are set by Mocha, which uses that term to describe a higher-level construct where multiple perspective or affine trackers are created for you in an arbitrary plane region, bound together into a shared planar-constraint, and solved together (not individually as in blender). That is the Perspective solution for every one of the trackers in the plane must match not only it's local image distortion, but also the planar constraint and the other tracks in the plane. Further, these tracks can be automatically 


I hope that recap is more helpful than confusing. Did I get it right Sean? 


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