-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Curtis Olson wrote: | On Jan 25, 2008 8:31 AM, STEPHEN THISTLE wrote: | | I am relatively new to flight gear and am interested in using it as | a visualization tool for UAV's. I would like to replace the fg | scenery with images captured from a camera onboard an aircraft. I | was wondering if there is any way to import images into flightgear | on the fly. The basic goal would be to show live video where | available and fall over to flight gear visuals when the feed is | lost(using a custom view from the camera perspective) .I am not sure | if this is currently possible but I would like to explore the idea | either using external tools or contributing to fg. Also a link to | some documentation on the fg architecture especially how it handles | the visualizations would be greatly appreciated. | | | I don't think there's any current way to do this. However, I think what | is needed is to link in some video capture library to do frame grabs | from your video camera as quickly as possible. Then do whatever bit | fiddling is needed to scale/convert the raster image to an opengl | texture. Then draw this texture on a quad that is aligned correctly | relative to the camera. It might be possible to get fancy and alpha | blend the edges a bit. | Getting live video onto a texture is pretty standard stuff in the OpenSceneGraph community, I believe. You might want to ask on the osg-users mailing list.
| Given an image and the location and orientation of the camera, it would | be possible to locate world coordinates across a grid on that image. | That would allow a quick/crude orthorectification where the image could | be rubber sheeted onto the terrain. This would take some offline | processing, but you could end up building up a near real time 3d view of | the world than could then be viewed from a variety of perspectives. The | offline tools could update the master images based on resolution or | currency ... that's probably a phd project for someone, but many of the | pieces are already in place and the results could be extremely nice and | extremely useful (think managing the effort to fight a dynamic forest | fire, or other emergency/disaster management, traffic monitoring, | construction sites, city/county management & planning, etc.) I could | even imagine some distrubuted use of this so that if you have several | uav's out flying over an area, they could send their imagery back to a | central location to update a master database ... then the individual | operators could see near real time 3d views of places that another uav | has already overflown. | If you want to see a view of the terrain updated by the UAV's camera, then nothing needs to be done offline. Assuming you have accurate position and orientation data from the UAV, you can project its imagery directly on the terrain as a projected texture. | If we started building up more functionality in this area, there are a | lot of different directions we could take it, all of which could be | extremely cool. Yup... Tim -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (GNU/Linux) Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org iD8DBQFHmg7meDhWHdXrDRURAtvhAKC5V5HJMAXu1k7ogoWEgejOCYpXLACgnb9V NeqGLibyJOk6Y+g161UThvk= =KsvA -----END PGP SIGNATURE----- ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
