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SusanModerator
(Stranger )
08/28/01 04:09 PM
2D to 3D Report this article as Inappropriate to us !!!Login to Reply

How do you project a 2D image as a 3D image and get the depth of topographical features needed?



cp07091982
(Stranger )
08/31/01 07:06 AM
Re: 2D to 3D new [re: Susan]Report this article as Inappropriate to us !!!Login to Reply

I've heard that you could probably do that and a whole lot more with the extension for ArcView from Esri called "3D Analyst".



gator
(Stranger )
11/06/01 10:27 PM
Re: 2D to 3D new [re: Susan]Report this article as Inappropriate to us !!!Login to Reply

ERDAS Image Analysis is another good way. ArcView converting the image using TIN (Tringulated Irrigular Network) is a very good way to display a 3D. You can also create a FlyThrough.



crnila
(Stranger )
11/19/02 08:03 AM
Re: 2D to 3D new [re: Susan]Report this article as Inappropriate to us !!!Login to Reply

Please, be more specific.
What kind of 2D image? What is the contents of that image? Is it color, B&W or gray. Is it aerophoto, topographic map, or something else?



MaB
(Stranger )
12/06/02 07:34 AM
Re: 2D to 3D new [re: Susan]Report this article as Inappropriate to us !!!Login to Reply

Your post can be read in two ways.

If you have a DEM and another image that is geographically registered to the DEM, Then you can represent these in #D by using something like ERDAS IMAGINE Virtual GIS or ESRI 3D Analysts.

If you have stereo images, you can triangulate the images and view them in Stereo/3D and extract information in D.

Depends on what you actually mean by your question





anaana_21
(Stranger )
10/18/03 03:20 PM
Re: 2D to 3D new [re: MaB]Report this article as Inappropriate to us !!!Login to Reply

There are certain ways by which you can extract 3D information from a simple 2D image and project the informations in 3D.

This is a research topic and very soon this technology may be comercialised.

Right now I cannot give you more information but you can search for the links in diffrent universities of the world.




drichers
(Stranger )
02/04/04 08:22 AM
Re: 2D to 3D new [re: Susan]Report this article as Inappropriate to us !!!Login to Reply

Hi...While COTS software like Erdas Imagine is an easy way to do this, it does require a license and $$$$. What I normally do is co-register
DEM data to an image (it can be satellite, geologic maps, environmental data, whatever)
and then scale the DEM to some reasonable vertical axis such as 100 ft = 1 pixel. I have a program I wrote back around 1991 that then reprojects
the image using simple trig functions and writes a colorized pixel column from the back forward, I also have another program I wrote recently that merely builds a voxel volume. In either case, you can easily display
the image using a variety of
free tools found on the net such as Univ of Utah's RLE toolkit( Ie create image as raw then use rawtorle fucnction then rletogif. I also have my own raw-tif converter and raw-ps) or ImageMajick.
See http://www.geocities.com/mtevans_gs/html/satellite.html for an example image where I draped a portion of a setelite image over DEM.

Good luck.




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