| Re: stereo in window [message #45115] |
Thu, 11 August 2005 14:10  |
Dick Jackson
Messages: 347
Registered: August 1998
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Senior Member |
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"Rick Towler" <rick.towler@nomail.noaa.gov> wrote in message
news:ddfveb$es2$1@news.nems.noaa.gov...
> chamakuri wrote:
>> Hello,
>>
>> I have been using IDL for sometime, and have grown to appreciate the
>> possibilities it offers to a programmer.
>>
>> I have a peculiar problem at hand which is described below
>>
>> I have two images which have been taken from two different angles ( I
>> came to understand that they are referred as *stereo* pairs), I am
>> interested in creating a 3D effect by simultaneously viewing them in a
>> single window (aka stereo in a window) using IDL.
>>
>> Now I am not an expert in this kind of things, but I understand that
>> there are two methods of achiveing stereo in window
If you have a good stereo image pair, the real problem is how to get the two
different images to your two eyes at the same time, and perhaps to nudge
them as needed to get the correct positioning in front of the eyes.
>> A) Anaglyph, if I am not wrong, uses two colors to display the image
>> viz. red and green (god knows why only red and green)
The anaglyph method requires red-green "3D glasses" to let your eyes see two
different pictures from the same RGB image. This requires changing the
colour of the images in a fairly substantial way (but I haven't seen how
that "Images 3D" program does it).
>> B) Quadbuffer ,something related to hardware rendering and is way
>> beyond me(and is definitely ruled out leaving me with option A only.)
I believe you are talking about something like Stereo OpenGL which is not
currently supported in IDL. In any case you still need some way to direct
two different images to your two eyes. Rick mentions several...
>> Any ideas how one can create anaglyph in IDL using object graphics?
>>
>> Oh I forgot to mention that the images are color images and I dont want
>> to loose the color information.
>>
>> Any kind of help in form of code and/or pointers to literature on
>> stereo in window would be highly appreciated.
> Another option is polarizing filters and glasses which I would think would
> be the preferred method. In the most basic form you would do as Ben
> suggested by displaying the image in two windows close together but you
> would position each behind a sheet of polarizing film. Along with the
> glasses this blocks the left and right images from the opposite eye much
> like those old stereo viewers.
>
> There have been a number of creative display methods tossed around from
> using saran wrap taped to your monitor to dual monitor displays to dual
> projector displays with polarizing filers. There are also commercial 3d
> display systems too but they might not be in your budget. I'm a fan of
> the dual projector approach if only I had the time to play around with
> it...
>
> Dick Jackson has done a lot of work on this recently (with OG primitives,
> not stereo image pairs). He was kind enough to send me this link to a
> company that sells polarizing films (http://www.3dlens.com/enter.html)
> There are a number of shops that will sell the glasses too.
As it turns out, I've been working with image pairs too, and for either kind
of stereo viewing, I've had very good results with a commercial system
(about US$3000) from Planar:
http://www.planar.com/Advantages/Innovation/docs/ds-planar-s tereo-mirror.pdf
Here is another popular one:
http://www.stereographics.com/products/crystaleyes/body_crys taleyes.html
> You should be able to google a ton of information about this. From the
> concepts to methods to materials.
For a good starting point, Wikipedia is indeed our friend:
http://en.wikipedia.org/wiki/Stereoscopy
Hope this helps!
Cheers,
--
-Dick
Dick Jackson / dick@d-jackson.com
D-Jackson Software Consulting / http://www.d-jackson.com
Calgary, Alberta, Canada / +1-403-242-7398 / Fax: 241-7392
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