eduardo.diaz.c at gmail.com
Wed Jun 20 15:13:17 EDT 2007
Do you plan to distribute the source code of the activity?
> -----Mensaje original-----
> De: devel-bounces at lists.laptop.org
> [mailto:devel-bounces at lists.laptop.org] En nombre de Benjamin
> M. Schwartz
> Enviado el: Miércoles, 20 de Junio de 2007 15:09
> Para: Eben Eliason
> CC: bens at alum.mit.edu; devel at laptop.org
> Asunto: Re: Panorama activity
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> Eben Eliason wrote:
> > That's a lot of shots. Can you do some tests to determine
> the minimal
> > required number that still produces decent stitches?
> I would be happy to do some tests.
> > Would 25% overlap
> > be sufficient?
> Probably. That would correspond to about 12 frames in a full circle.
> > Here's another thought....I know this is probably pushing
> things a lot
> > on our little machine, but how long would a single diff take to
> > determine the angle between a previously taken photo and a
> newly taken
> > one.
> On my computer I can probably calculate the angle ten times a
> second; on an XO, maybe once a second. However, this means
> that during the entire process, the machine is running at
> 100% CPU, so interactivity may suffer.
> I had a much simpler idea: overlay the previous frame on the
> video field, offset by the desired amount (say, 70%). This
> is what many consumer digicams do in panorama mode, including
> my cell phone. It is then obvious to the user to turn the
> screen until the overlaid image aligns with the camera
> output. Based on the Video Chat/Virtual Whiteboard mockups,
> it seems like we have accelerated alpha on top of video on
> the LX, but I don't know this for sure...
> - --Ben
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