[Activities] Panorama activity

[Jeff Keller]

Yeah -- I sent my loaner unit off to Burning Man, but I should get it
back soon, and I'd be delighted to talk about stitchers.  Randy
Sargent and I wrote our own for GigaPan last summer because nothing
else was up to the task.  It relies on a model of the GigaPan device's
behavior to do rough placement, but it can auto-stitch 1000+ images
with < 10 pixels rms displacement error, and it should be open-sourced
one of these days.  Of course, it uses much more storage, RAM, and CPU
than an XO has, but nothing inappropriate to what it does, and there
are some nice improvements in the works.  Oh, and my office is down
the block from OLPC's.
--Jeff

On Fri, Sep 5, 2008 at 12:38 PM, Samuel Klein <sj at laptop.org> wrote:
> Speaking of which, Jeff Keller has been trying to get OLPC folks to
> learn more about using his gigapan group's cameras (and perhaps to
> borrow one to bring them into a country for weeks) for a while.  Jeff,
> Ben Schwartz and Nirav are really interested in large-scale image
> splicing...
>
> SJ
> ---
> 617 529 4266
>
>
> On Fri, Sep 5, 2008 at 2:08 AM, Brian Jordan <brian at laptop.org> wrote:
>> *bump*
>>
>> http://wiki.laptop.org/go/Panorama_camera_activity
>>
>> (code? Nirav is interested in doing something similar!)
>>
>> Brian
>>
>>> On Wed, Jun 20, 2007 at 11:56 PM, Benjamin M. Schwartz <bmschwar at fas.harvard.edu> wrote:
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>>> The XO happens to be perfect for shooting stitched panoramic photographs, due to
>>> the swivel design.  I tested it out in the OLPCHQ lobby. Then, I wrote a simple
>>> panorama stitcher in 50 lines of Python.  It runs in 3.4 seconds on my Core Duo,
>>> producing this output:
>>>
>>> http://people.fas.harvard.edu/~bmschwar/lobby_ugly.jpg
>>>
>>> The results aren't too bad.  I also tried stitching this scene with Hugin, the
>>> most powerful panorama stitcher I know of.  Hugin required significant user
>>> intervention and half an hour of computing time, producing this output:
>>>
>>> http://people.fas.harvard.edu/~bmschwar/lobby_pretty.jpg
>>>
>>> This scene is unusually difficult because of the huge indoor-outdoor contrast.
>>> Given this positive result, I would like to work on a panorama-making activity,
>>> possibly inside Capture.  I know that at age 10, I loved making panoramas out of
>>> photographs.  Panoramas provide an immersive way for children to communicate
>>> their environments to each other and to the world.
>>>
>>> - --Ben Schwartz
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>