Panorama activity

[Eduardo Díaz]

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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