[dorkbotpdx-blabber] Re: anagyph dec 20 2007

[paige saez]

the "blue" used in 3-d images is not actually a true blue.

it is a lighter shade of blue-green. if you look around for the exact color
it is easy to find.



On Dec 21, 2007 9:45 AM, Anselm Hook <anselm at gmail.com> wrote:

> I went to the 3D Museum yesterday which is in NW Portland; they have
> simply amazing examples; far better than anything you'll see online.
> In particular there is a collection of cactuses / cactii? a prickle of
> cactus?  anyway - definately worth seeing.
>
> They also have a 15 minute short movie in 3d based on a sci fi book; also
> good.
>
> In any case then I just googled how to do it.
>
> I think the first approach was pretty sucky; I want to have both
> lenses actually focus on the target in question....  Although the
> examples and tutorials on the net don't really discuss this point; it
> does seem more reasonable that the camera focal target should not
> change...  in the anaglyph of us you can see that the parallax is
> shifting sideways; and thats probably not quite right.
>
> Also, I think perhaps for computer displays there is some quality of
> light; possibly a lack of blue? { since the human eye is more
> sensitive to red the hardware designers perhaps cheat on blue?  I've
> certainly done the same in video games I've written }.  A better way
> would probably be to use left/right shutter glasses for dealing with a
> computer display in any case.  That's why I also tried the projector;
> I thought it might have a nicer quality of light in some way...  At
> the 3D museum they have polarized lenses; the movie is projected
> through two projectors using polarization...
>
>  - a
>
>
>
>
> On Dec 21, 2007 7:40 AM, mark gross <markgross at thegnar.org> wrote:
> > This is way cool.
> >
> > ImageMagick is cool.  At the next event I'd like to hear about any
> > lessons learned using it.
> >
> > --mgross
> >
> >
> >
> > On Thu, Dec 20, 2007 at 08:19:54PM -0800, Anselm Hook wrote:
> > > whoops the image was too big for the list...  you can see it on
> flickr.
> > >
> > >  -a
> > >
> > > On Dec 20, 2007 8:01 PM, Anselm Hook <anselm at gmail.com> wrote:
> > > > see enclosed image.  also, see here:
> > > >
> > > >   http://flickr.com/photos/anselmhook/2126340942/
> > > >
> > > > (tagged with dorkbotpdx)
> > > >
> > > > hopefully this won't crush your mail readerz
> > > >
> > > > it is a 3d red/blue anaglyph of our event that's going on right now
> > > > thursday dec 20th at oh 7:54 pm - with a pair of sd1000's that i
> > > > borrowed today:
> > > >
> > > >   http://flickr.com/photos/anselmhook/2126334740/
> > > >
> > > > and then went to ace hardware and picked up a mounting bracket that
> > > > exactly fit; and had the dude there help me find exactly the right
> > > > screw mount ... and then drilled out and mounted...
> > > >
> > > > i built this image by the following shell incantations
> > > >
> > > >   convert left_original.jpg -colorspace gray left.png
> > > >  ... same for right...
> > > >   composite -stereo left.png rite.png pdxstupcrew2.mpg
> > > >
> > > >  - a
> > > >
> > > _______________________________________________
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