Re: Stereoscopic video

[P3D Andrew Woods <andrew@xxxxxxxxxxxxxxxxxxxxx>]

Alfredo Gonzalez wrote:
> Do you know if images prepared for 3D-MAX they are
> compatibles with others systems as Stereographics? 

The answer appears to be YES, according to the paper "Universal 
Electronic Stereoscopic Display" (by Lipton & Halnon) presented 
at the last Stereoscopic Displays and Applications conference (Feb'96).

The paper says "Simuleyes VR images may be formatted in interlace, non-
interlace, page-swapping and any other raster mode."  The images which
I have generated are 3D Interlaced GIF files (i.e. odd and even lines of 
the GIF image are left and right image lines).  If the display is switched
into interlace mode, the left and right images will be displayed as
two separate fields and suitable for viewing with LCD shutter glasses.

The Simuleye VR glasses do however require a "WHITE CODE" at the bottom
of the screen for their "black box" to identify which field is which
(to prevent pseudo stereo).  My images do not contain this white code
so it would be necessary to either insert these codes manually or
use a display program which inserts the WHITE CODE.  I don't know whether
such a program is available from StereoGraphics.

> I think Stereographics
> work with compression of stereo pair and double frequency to make
> field-sequential. 

Just to make sure we are talking about the same thing: The "Compression"
StereoGraphics have used for quite some time in their stereoscopic displays
is a form of vertical squeezing (not compression like JPEG or huffman...)
The normal screen is divided into two halves (a top half and a bottom
half).  The left image is Squeezed into the top half and the right image
is squeezed into the bottom half (or vice versa).  An external box then
inserts an additional sync pulse between the top and bottom image to 
generate a 2 times normal refresh rate, field-sequential 3D image.
(see my paper "3D Video Standards Conversion" for some additional 
 information "http://info.curtin.edu.au/~iwoodsa/spie96/spie96pa.html")

To my knowledge the Simuleyes VR system does not use this technique.

> I don't know if they work also in interlaced mode as 3D-MAX. 

According to the paper, yes.

> Can I see your underwater images with Simuleyes or 3DTV glasses?

There is nothing inherent in my images to stop them being used with
the other types of LCD shutter glasses systems.  It just depends upon
whether they will display 3D interlaced GIFs as standard or whether
my images must be converted to another format to be compatible with their
system.

It also depends whether there is software provided with these systems
to allow independant images to be loaded and viewed.

At present I cannot say one way or the other whether SimuleyesVR or
the 3DTV systems can "easily" view my underwater images...

Regards,
Andrew.
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