Re: Distortion Correction

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Gordon Tomlinson (gordon++at++paradigmsim.com)
Mon, 23 Aug 1999 07:42:59 -0500

Hi Miguel

This does not quite answer your question but Vega has
a software Noln linear Distortion module that you could
consider.

http://www.paradigmsim.com/products/nldc.htm

Gordon.

Miguel Lozano wrote:

> pfHello everyone, I need some help in some "curved questions" and I hope
> you can help me .
>
> The main question is how can I correct the distortion produced in the
> projection of flat images onto a curved screen.
>
> I think there is a Sw solution (review OpenGL Advanced98 Notes) using
> texture mapping and although I donīt know exactly how to apply this
> solution, it seems to me too much expensive in terms of computational
> cost, but I'm really not sure about it .(Anyone has applied this
> solution and works fine?)
>
> I wonder also if anyone has tryed to modify the Projection matrix to
> avoid this problem, and if its also possible this kind of solution?
>
> In terms of Hw solution, anybody knows if a general Hw solution exists
> to correct this distortion?.
>
> My system consist of 3 SGI IR. and three MultiScan VPH-G70VR SONY
> projectors.
>
> Any idea about these questions would be very appreciated.
>
> Thanks in advance.
>
> -------------------------------------------------------
> Miguel Lozano Ibáņez e-mail:miguel++at++glup.irobot.uv.es
>
> Grupo ARTEC
> Instituto de Robotica Tel: +34 6 364 2253
> Universitat de Valencia Fax: +34 6 364 4841
> Poligono de la Coma s/n
> 46071 Valencia (SPAIN)
> -------------------------------------------------------
>
> -----------------------------------------------------------------------
> List Archives, FAQ, FTP: http://www.sgi.com/software/performer/
> Submissions: info-performer++at++sgi.com
> Admin. requests: info-performer-request++at++sgi.com

--


Regards


Gordon.


Gordon Tomlinson              | Multigen - Paradigm  Inc
Vega Software Engineer        | Suite 400, 14900 Landmark Blvd
Email: gordon++at++paradigmsim.com | Dallas, Texas 75240, USA
Tel:    972 960 2301          | Fax:    972 960 2303
______________________________________________________________


'Smoke me a kipper skipper, I'll be back for breakfast'
______________________________________________________________


NOTE:
All opinions here within this email are soley mine and DO NOT
reflect those of MultiGen Paradigm or any other employee.










Hi Miguel

This does not quite answer your question but Vega has

a software Noln linear Distortion module that you could

consider.

http://www.paradigmsim.com/products/nldc.htm

 

Gordon.

 

Miguel Lozano wrote:

pfHello everyone, I need some help in some "curved
questions" and I hope

you can help me .

The main question is how can I correct the distortion produced in the

projection of flat images onto a curved screen.

I think there is a Sw solution (review OpenGL Advanced98 Notes) using

texture mapping and although I don´t know exactly how to apply
this

solution,  it seems to me too much expensive in terms of computational

cost, but I'm really not sure about it .(Anyone has applied this

solution and works fine?)

I wonder also if anyone has tryed to modify the Projection matrix to

avoid this problem, and if its also possible this kind of solution?

In terms of Hw solution, anybody knows if a general Hw solution exists

to correct this distortion?.

My system consist of 3 SGI IR. and three MultiScan VPH-G70VR SONY

projectors.

Any idea about these questions would be very appreciated.

Thanks in advance.

-------------------------------------------------------

Miguel Lozano Ibáñez e-mail:miguel++at++glup.irobot.uv.es

Grupo ARTEC

Instituto de Robotica  Tel: +34 6 364 2253

Universitat de Valencia  Fax: +34 6 364 4841

Poligono de la Coma s/n

46071 Valencia (SPAIN)

-------------------------------------------------------

-----------------------------------------------------------------------

List Archives, FAQ, FTP:  http://www.sgi.com/software/performer/

           
Submissions:  info-performer++at++sgi.com

        Admin. requests:  info-performer-request++at++sgi.com



-- 


Regards

Gordon.


Gordon Tomlinson              | Multigen - Paradigm  Inc
Vega Software Engineer        | Suite 400, 14900 Landmark Blvd
Email: gordon++at++paradigmsim.com | Dallas, Texas 75240, USA
Tel:    972 960 2301          | Fax:    972 960 2303  
______________________________________________________________

'Smoke me a kipper skipper, I'll be back for breakfast'         
______________________________________________________________

NOTE:
All opinions here within this email are soley mine and DO NOT 
reflect those of MultiGen Paradigm or any other employee.

 

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