Does anyone have any experience using oblique images from known locations (2 or more cameras at different locations) to extract 2 and 3 d information?
The intended application would be to track fire growth and expansion over time.
T
--
Trevor Wiens
twiens@interbaun.com
The significant problems that we face cannot be solved at the same
level of thinking we were at when we created them.
(Albert Einstein)
On Sat, Feb 19, 2005 at 12:52:15AM -0700, Trevor Wiens wrote:
Does anyone have any experience using oblique images from known locations (2 or more cameras at different locations) to extract 2 and 3 d information?
The intended application would be to track fire growth and expansion over time.
Nothing helpful, but we have at least extended the i.ortho.photo procedure to
geocode oblique imagery:
- M. Neteler, D. Grasso, I. Michelazzi, L. Miori, S. Merler, and C. Furlanello. New image
processing tools for GRASS. In Proc. Free/Libre and Open Source Software for Geoinformatics:
GIS-GRASS Users Conference 2004, Sept. 12-14, Bangkok, Thailand, 2004.
http://gisws.media.osaka-cu.ac.jp/grass04/viewpaper.php?id=37
- M. Neteler, D. Grasso, I. Michelazzi, L. Miori, S. Merler, and C. Furlanello, 2005,
An integrated toolbox for image registration, fusion and classification.
International Journal of Geoinformatics, Special Issue
on FOSS/GRASS 2004 & GIS-IDEAS 2004 (in press)
On top of the geocoded imagery one could think of developing something maytbe
with r.series etc.
Markus
On Mon, 28 Feb 2005, Markus Neteler wrote:
Does anyone have any experience using oblique images from known locations
(2 or more cameras at different locations) to extract 2 and 3 d
information?
Nothing helpful, but we have at least extended the i.ortho.photo procedure to
geocode oblique imagery:
Perhaps manual methods would not be helpful, but the use of a stereoscope
and measuring tools on stereo aerial photos will let you measure heights.
I've done this to obtain the heights of trees on a site.
Rich
--
Dr. Richard B. Shepard, President
Applied Ecosystem Services, Inc. (TM)
<http://www.appl-ecosys.com> Voice: 503-667-4517 Fax: 503-667-8863
On Mon, 28 Feb 2005 18:30:44 +0100
Markus Neteler <neteler@itc.it> wrote:
On Sat, Feb 19, 2005 at 12:52:15AM -0700, Trevor Wiens wrote:
> Does anyone have any experience using oblique images from known locations (2 or more cameras at different locations) to extract 2 and 3 d information?
>
> The intended application would be to track fire growth and expansion over time.
>Nothing helpful, but we have at least extended the i.ortho.photo procedure to
geocode oblique imagery:- M. Neteler, D. Grasso, I. Michelazzi, L. Miori, S. Merler, and C. Furlanello. New image
processing tools for GRASS. In Proc. Free/Libre and Open Source Software for Geoinformatics:
GIS-GRASS Users Conference 2004, Sept. 12-14, Bangkok, Thailand, 2004.
http://gisws.media.osaka-cu.ac.jp/grass04/viewpaper.php?id=37- M. Neteler, D. Grasso, I. Michelazzi, L. Miori, S. Merler, and C. Furlanello, 2005,
An integrated toolbox for image registration, fusion and classification.
International Journal of Geoinformatics, Special Issue
on FOSS/GRASS 2004 & GIS-IDEAS 2004 (in press)On top of the geocoded imagery one could think of developing something maytbe
with r.series etc.
Thanks. This would be helpful for 2-d data, but for objects like smoke plumes, I'm not sure how this could work. Since posting the question on the list, I've run across the Stereo application that appears to have sat dormant for some years. A collegue and I are going to redo the interface in PyQt and keep most of the underlying C code for camera calibration, coordinate tranformation, etc. The planned output will be tab delimited ascii files. The long term plan is to incorporate Deluany Triangulation code to export 3-d objects rather than just point clouds. Once this work is running we will set up a small website for the project in the event that others want to use or develop it further.
T
--
Trevor Wiens
twiens@interbaun.com
The significant problems that we face cannot be solved at the same
level of thinking we were at when we created them.
(Albert Einstein)
From: "Trevor Wiens" <twiens@interbaun.com>
Markus Neteler <neteler@itc.it> wrote:
On Sat, Feb 19, 2005 at 12:52:15AM -0700, Trevor Wiens wrote:
> Does anyone have any experience using oblique images from known
> locations (2 or more cameras at different locations) to extract 2 and 3
> d information?
>
> The intended application would be to track fire growth and expansion
> over time.
>Nothing helpful, but we have at least extended the i.ortho.photo
procedure to
geocode oblique imagery:- M. Neteler, D. Grasso, I. Michelazzi, L. Miori, S. Merler, and C.
Furlanello. New image
processing tools for GRASS. In Proc. Free/Libre and Open Source
Software for Geoinformatics:
GIS-GRASS Users Conference 2004, Sept. 12-14, Bangkok, Thailand, 2004.
http://gisws.media.osaka-cu.ac.jp/grass04/viewpaper.php?id=37- M. Neteler, D. Grasso, I. Michelazzi, L. Miori, S. Merler, and C.
Furlanello, 2005,
An integrated toolbox for image registration, fusion and
classification.
International Journal of Geoinformatics, Special Issue
on FOSS/GRASS 2004 & GIS-IDEAS 2004 (in press)On top of the geocoded imagery one could think of developing something
maytbe with r.series etc.
Thanks. This would be helpful for 2-d data, but for objects like smoke
plumes, I'm not sure how this could work. Since posting the question on
the list, I've run across the Stereo application that appears to have sat
dormant for some years.
A collegue and I are going to redo the interface
in PyQt and keep most of the underlying C code for camera calibration,
coordinate tranformation, etc.
So will it be possible to extract the elevation from a stereo pair of vertical aerial photos using your Stereo-based application?
The planned output will be tab delimited ascii files.
And I could import it into Grass and interpolate into a raster DEM, correct?
The long term plan is to incorporate Deluany Triangulation
code to export 3-d objects rather than just point clouds.
Which e.g. could be an shp file and imported into Grass for visualization in NVIZ as a 3d polygon vector layer etc.?
If I'm any wrong here please correct me. But If I'm not - yippie! what a perspective! Thank you for this inintiative a tone!
Once this work
is running we will set up a small website for the project in the event
that others want to use or develop it further.
Please keep the grasslist informed.
Maciek