It is a little off topic but I thought many of the forum goers might find the Photosynth to 3D process I've been working on useful for creating 3D models from aerial photos. The process is pretty simple and FREE:
· Gather images with a lot of overlap (like most of our aerial shots)
· Use this exporter to extract the point cloud http://pspcexporter.codeplex.com/
Here are two examples from my work in Ecuador and West Texas:
http://www.youtube.com/user/mdwillis01#p/u/6/nJgvLll57f0 (only part of this one was done with Photoysnth).
The images were captured from kite and balloon platforms but the same workflow should work for any series of photographs.
Also, here is a Google Earth file with some of the same data http://220.127.116.11/~mwillis/Puchara_Grande.kmz (~10 Mb). My linux box connection is slow. It'll take a bit to download.
I had a look at the hypr3D and it looks impressive. Seems to sit somewhere between Photosculpt and Photosynth and produces results that are seemingly far superior to both. Can't wait to try it myself and see what we get, thanks for the link. What they seem to have resolved is the overall curvature in surfaces that both Photosculpt and Photosynth exhibit and their models of planar surfaces appears highly accurate. Very promising!
Hi Tommy. Sorry for the slow reply. Somehow I missed your message!
A (overly?) detailed explanation of the process is available at palentier.blogspot.com
Hello to all of you!
Great job Mark! I want to ask a question.
I' m interested in making DEM and orthophotos with a small RC plane on the cheap. I will use it for morphotectonic studies, coastal and wetland monitoring.
I want to use a cheap rc plane and mount a pocket camera in order to take nadir photos. Any suggestions?
A great free (open source) software for orthorectification is ILWIS. You can download it from 52 North site. ILWIS is a windows program, with a great gui and an extensive help file.
GRASS GIS is one of the best software for ortho but you it has a very steep learning curve especially for hobbyists.
@ Bohumil Michalik: ERDAS is also a very powerfull but quite expensive software.
Johny, the Hawkeye running ardupilot has been tested by a friend of mine with good results. The Hawkeye is basically a powered kite. It is able to fly very slowly allowing for good imagery overlap. http://www.electricflights.com/
Thanks for the software suggestions. I'm one of the few that was using GRASS in the early 1990s. I should check it out again.
I realize there has not been a lot of activity on this forum post for a while, but I would like to share some research with you regarding the attainable accuracies of Mark's Photosynth workflow. Please refer to a presentation I have given at a GIS conference
Hello, I also am an enthusiast of kite mapping, and not only. Unfortunately I struggle by doing it on my own. I have tried out, and keep using airplane and multicopter drones and kites with rigs. I also tried to recrute a friend of mine in developing o personal version of bundler, in a sense. I would like him to accomplish all that I need, him being the programmer. Try to put it all together in some sort of an app to run under fedora or ubuntu that should include georeferencing of point cloud after generating, stitching of images, orthorectification. meanwhile, I still am on my own and have to give him examples and data. So I kinda gathered some open source apps for generating the point cloud, the georeference it using a bit of script. Stitching I manage to do with ICE. But I have pb with this since it is open source and underdeveloped, it crashes frequently, or it limits the amount of data that can process. So I was wondering, what do you use for georeferencing the pointcloud and how do you drape the image stitch upon the 3D model and orthorectificate it?