Re: 3D Tracker

["Tim Leydecker" <BauerOink(at)gmx.de>]

It´s probably not nearly as good a result as what Jordi
gets when using 3D Equalizer but I managed to get a
track out of the MMTrack 2.0 plug-in for Maya (6)
yesterday, based on one 1024x768 image split into
three 1024x576 images (shifting the crop upwards).
The orientation is way off but the focal length was
good enough to be declared close -  especially for
an image with significant lens distortion (wideangle
plus cheap lens...e.g. a realistic DV shoot situation)

That´s good enough for the hippiesque, educational realm
I do this for currently - I often get asked from our DV/film
guys stintly looking into my Maya class at university if there is
ways to spice up their footage with all sorts of graphic/stylish
elements in class. From that test, it seems I´ll be able to pull off
a tutorial session that get´s such locked-off camera position for
such (simpler type of) effects by planning in one extra slow pan
off a tripod as base for the track.

Cheap&fast&memorizeable enough to do in DV,
even for students where everything is more based on luck anyway...

Cheers and thanks again for your suggestions,

tim

----- Original Message ----- 
From: "Tim Leydecker" <BauerOink(at)gmx.de>
To: <XSI(at)Softimage.COM>
Sent: Thursday, January 18, 2007 2:46 PM
Subject: Re: 3D Tracker


> >I use Equalizer for that too... You can provide a track of static frames and
> > will bring cameras aligned inside XSI.
>
> That´s a pretty nice trick. I´ll give it a go with the voodoo tracker
> and the free Realviz Matchmover plug-in for Maya.
>
> Thanks, I had thought it´s a conceptual thing but you´ve
> implied it rightly, it´s worth a try...
>
> Cheers
>
> tim
>
>
> ----- Original Message ----- 
> From: "jordibares" <jordibares(at)the-mill.com>
> To: <XSI(at)Softimage.COM>
> Sent: Thursday, January 18, 2007 12:38 PM
> Subject: Re: 3D Tracker
>
>
> I use Equalizer for that too... You can provide a track of static frames and
> will bring cameras aligned inside XSI.
>
> :)
>
> jb
>
>
> On 18/1/07 08:57, "Tim Leydecker" <BauerOink(at)gmx.de> wrote:
>
> > Hey Jordi,
> >
> > I´d like to add that there´s a need for single image tracking and
> > camera reconstruction from such. To my knowledge only the
> > http://www.photomodeler.com/
> >
> > offers such functionality - e.g. if there is an imagesequence there´s
> > ususally loads of tools ranging from freeware voodoo to Boujou
> > that allow to create and export a final 3Dtrack w/camera to XSI
> > but if it´s a single image to work from one is mostly stuck with
> > manual fiddling and guestimating values and battling the 3D camera.
> >
> > I don´t want to sound cocky but imho it would be useless to have
> > "just another" 3Dtracker "copied" into the XSI interface instead
> > of reworking the camera manipulation tools (as you also pointed out)
> > to easily allow for changing aspectratios, focal lengths and the
> > distances between object2camera independently from each other,
> > e.g. not being restricted to ratios based on the imageratio and center.
> >
> > And also being able to move the 3D camera in the direction/vector of
> > it´s interest (in the direction it looks at) with _OR without changing
> > the focallength and aspectratio would be desireable as this could
> > mimik a "cropping" behaviour with free aspectration currently difficult
> > to achieve.
> >
> > Simple example, I track a 4000x5120 plate, take the camera and
> > "crop in" at 1200x1600, render and the element fits correctly onto
> > the large plate even thought the "crop/zoom" occured off-center.
> >
> > Cheers
> >
> > tim
> >
> >
> >
> >
> > ----- Original Message -----
> > From: "jordibares" <jordibares(at)the-mill.com>
> > To: <XSI(at)Softimage.COM>; "Luc Froelicher" <lulu(at)alamaison.fr>
> > Sent: Wednesday, January 17, 2007 5:23 PM
> > Subject: Re: 3D Tracker
> >
> >
> > > > Not really, is about 2 different issues.
> > > >
> > > > 1. a image based tracking like PFTrack would be wonderful to have
> > > integrated
> > > > inside XSI
> > > > 2. In reality I rather need different tools to help aligning the camera
> > > than
> > > > doing a full 3D track which is something I already have perfectly solved >>
> via
> > > > 3DEqualizer.
> > > >
> > > > Hope it helps
> > > > jb
> > > >
> > > >
> > > > On 17/1/07 15:40, "Luc Froelicher" <lulu(at)alamaison.fr> wrote:
> > > >
> > > > >> is this some kind of XSI port of REALVIZ ? makes me wonder ...
> > > > >>
> > > > >> Ahmidou Lyazidi wrote:
> > > > > > >>> > something like this?
> > > > > > >>> >
> > > > > >>>
> http://www.naskafilms.com/REALVIZ/HATOR/R_D/plugs_softs_naska/NSKTrack.061210
> > > > > >>> dvx.avi
> > > > > > >>> >
> > > > > >>>
> <http://www.naskafilms.com/REALVIZ/HATOR/R_D/plugs_softs_naska/NSKTrack.06121
> > > > > >>> 0dvx.avi>
> > > > > > >>> >
> > > > > > >>> > 2007/1/17, jordibares <jordibares(at)the-mill.com
> > > > > > >>> > <mailto:jordibares(at)the-mill.com>>:
> > > > > > >>> >
> > > > > > >>> >     I would suggest Softimage to look at PF track as a licensing
> > > > > > >>> >     engine solution which I am sure could be very very welcome both
> in
> > > > > > >>> >     the 3D area and the 2D area of XSI but also to provide extra
> tools
> > > > > > >>> >     for manual tracking which actually nobody is doing.
> > > > > > >>> >
> > > > > > >>> >     One little example I keep giving is the ability to rotate the
> > > > > > >>> >     camera along an scene line/axis/point and dolly/zoom along a
> given
> > > > > > >>> >     point 2Dpixel/3D position so make our lives easier.
> > > > > > >>> >
> > > > > > >>> >     Jb
> > > > > > >>> >
> > > > > > >>> >
> > > > > > >>> >
> > > > > > >>> >
> > > > > > >>> >     On 17/1/07 00:49, "Eriya Ito" <eriya.ito(at)grapecity.com
> > > > > > >>> >     <mailto:eriya.ito(at)grapecity.com>> wrote:
> > > > > > >>> >
> > > > > > >>> >         Any script / tool to track translation of a 3D model to BG
> > > > > > >>> >         rotoscope.
> > > > > > >>> >         Rotation & scaling support also would be more than terrific
> > > > > > >>> >         but for now,
> > > > > > >>> >         I need to track an object to somebody's hand and boy do they
> swim
> > > > > > >>> >         around.
> > > > > > >>> >         I know there are 3rd party tracker such as Boujou but I
> > > > > > mean, any
> > > > > > >>> >         tracking
> > > > > > >>> >         feature built-in XSI that I missed...
> > > > > > >>> >
> > > > > > >>> >         Something like Maya Live (not trying to start another xx vs
> xx
> > > > > > >>> >         thread...
> > > > > > >>> >         ;-)
> > > > > > >>> >
> > > > > > >>> >         TIA,
> > > > > > >>> >         Eriya
> > > > > > >>> >
> > > > > > >>> >         ---
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> >
> >
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