[GRASSLIST:4990] anaglyph

GRASS GRASS user
1

Hello all,

is it possible to create anaglyph images (to view with red-and-blue 3D glasses)
with GRASS?

thanks all

Carlos Grohmann

--
+-------------------------------------------------+
        Carlos Henrique Grohmann - Guano
  Geologist M.Sc - PhD Student at IGc-USP - Brazil
     Linux User #89721 - guano at usp dot br -
+-------------------------------------------------+

2

On Mon, Nov 29, 2004 at 03:01:27PM -0200, Carlos Henrique Grohmann wrote:

Hello all,

is it possible to create anaglyph images (to view with red-and-blue 3D glasses)
with GRASS?

Hi,

yes, it's possible:

I was playing with that some time ago (using GRASS):
http://www.geog.uni-hannover.de/users/neteler/stereo/welcome.html

The procedure is roughly described.

Best

Markus

3

Thanks for your answer, Markus, but I still have some doubts: the procedure you
describe is for aerial photos, but I want to do it with DEMs. So, which points
shuld I use in d.fix.ortho, since there are no fiducial marks, and I only have
one image of the area?

thanks again
--
+-------------------------------------------------+
        Carlos Henrique Grohmann - Guano
  Geologist M.Sc - PhD Student at IGc-USP - Brazil
     Linux User #89721 - guano at usp dot br -
+-------------------------------------------------+

Citando Markus Neteler <neteler@itc.it>:

On Mon, Nov 29, 2004 at 03:01:27PM -0200, Carlos Henrique Grohmann wrote:
> Hello all,
>
> is it possible to create anaglyph images (to view with red-and-blue 3D
glasses)
> with GRASS?

Hi,

yes, it's possible:

I was playing with that some time ago (using GRASS):
http://www.geog.uni-hannover.de/users/neteler/stereo/welcome.html

The procedure is roughly described.

Best

Markus

4

On Thu, Dec 02, 2004 at 01:18:25PM -0200, Carlos Henrique Grohmann wrote:

Thanks for your answer, Markus, but I still have some doubts: the procedure you
describe is for aerial photos, but I want to do it with DEMs. So, which points
shuld I use in d.fix.ortho, since there are no fiducial marks, and I only have
one image of the area?

I didn't realize that you want to use a DEM.
Right, you will have to generate parallax which depends on
the local elevation height.

Once I tried to write some code, but never finished it.

It might be possible even with r.mapcalc.

Markus