Tag Info

Hot answers tagged

3

Full Credit to Henri EisenbeiƟ (Author) from the dissertation 1.1.1 UAV photogrammetry Extract: "The new terminology UAV photogrammetry describes aphotogrammetric measurement platform, which operates remotely controlled, semi-autonomously, or autonomously, without a pilot sitting in the vehicle. The platform is equipped with a photogrammetric ...


3

Opticks Image Segmentation Opticks is an open source Imagery Analysis Software. It will perform segmentation on an image and save the results to a Shapefile. The link has a short segmentation tutorial. The software runs on Windows 32/64, Linux and Solaris.


3

There is something better! Check this out: http://www.123dapp.com/. You can use 123Catch to combine many photo's into a 3D model. Then use 123Sculpt to make the model better! Alternately, try this stuff for a home-made solution: http://www.visual-experiments.com/ the guy who put it together has gone to work with Microsoft, so he's doing good things!


2

Open Aerial Map's wiki (http://openaerialmap.org/Processing) suggests GRASS GIS' i.ortho.photo and related modules (per Micha's suggestion). OSSIM http://trac.osgeo.org/ossim/ - probably best bet. http://www.digilab.uni-hannover.de/index.html - looks like it would require some development work to be useful http://www.orfeo-toolbox.org/otb/ - very active ...


2

So if I assume the following variables: x = camera sensor x size y = camera sensor y size f = focal length h = height above ground And I am looking for: ay = photo y ground distance ax = photo x ground distance Would these formulas work? making sure that I compare the proper units to the proper units. (f/h)*x = ax (f/h)*y = ay Does this make ...


2

For looking at points in QGIS you could check out lastools and their las2shp tool. That would turn your 3d point cloud (in las format) into a vector point file. lastools even has a QGIS toolbox now for full integration.


2

There are several softwares for doing this. Here is a non exhaustive list : Commercial licence : Imagine Photogrammetry (= formerly LPS) This is very powerful but very expensive ENVI DEM module photoscan Not very expensive, but more oriented toward drone image processing, so not the best for satellite data Open source : Orfeo Toolbox Not tested for ...


2

To calculate a volume, you need the 3D Analyst extension. 3D Analyst has several ways to calculate volumes. All methods require the data to be in a projected coordinate system. You can use TIN or Terrain surfaces. Method 1: Surface Volume This method assumes one of the surfaces is a flat plane and the other surface varies. It can calculate volumes ...


2

In Austria and Germany Karl Kraus taught remote sensing and photogrammetry and wrote several books which are IMO fundamental and very good for the understanding of this matter, despite the age of these books. Unfortunally he died in 2006. There is a translation made by Ian Harley and Stephen Kyle. Karl Kraus, Photogrammetry, Volume 1, 2007: Geometry from ...


2

There are successful solutions available based on eCognition, for instance: http://www.trimble.com/imaging/pdf/TM18_FINAL_INPHO.pdf eCognition offers the possibility to translate your mind model (why you see buildings in our images) into computer understandable code (= rule set). The eCognition Developer is the environment to create rule set. A good rule ...


1

Yes, I think SFM Toolkit (FOSS)is used for this task. Although I have not used it, it is very well reviewed. I have used Stereo GIS by SimWright and had good success. They may give you a free trial.


1

if your UAV images are well overlapping (at least 3 images for each observed feature), I recommend Agisoft Photoscan. It is not free but not very expensive. You can also have a look at orfeo toolbox, but it is not as easy to use as Erdas. However, they do have some tools for residual registration http://orfeo-toolbox.org/


1

Here is Easiest and free way to georeference an image file using QGIS and here are more links Georeferencing an image in QGis is a very simple task. Here is how: Run QGis and create a new, blank project. You don't need to save it. You should already have some other georeferenced material, the best is aerial photos, but also shapes could do. Open ...


1

Multipatch feature are supported 3D building. So you can try to do this method. plz refer to this link. http://resources.arcgis.com/en/help/main/10.1/index.html#//00q80000007n000000


1

Some time has passed, the topic is still relevant since new software became available: Did anyone try out the NASA Ames Stereo Pipeline (ASP, http://ti.arc.nasa.gov/tech/asr/intelligent-robotics/ngt/stereo/)? The source code is on github. Furthermore, in the open source software Orfeo Toolbox (OTB, http://orfeo-toolbox.org) they offer "One-click DEM ...


1

We have found the image segmentation model in Spring to be comparable to eCognition. Spring is a free remote sensing software developed by the Brazilian government.



Only top voted, non community-wiki answers of a minimum length are eligible