SfM and archeo-anthropology
Mon Mar 21 08:18:14 CET 2011
the skull is done with 40 pictures. Actually i have to finish the work
in Meshlab. As you see in the movie, the model is not yet completely
clean (there are some black point at the bottom). Next step is to
rebuild the surface (i want to test hard also this part of the wrkflow).
I already tried to create the mesh for this model, but i have to report
that unfortunately the Linux version of meshlab seems to be not yet so
stable like the windows version in building the surface (for all the
rest it works fine). Alessandro (that knows better this software) told
me that, if Meshlab crash too often in Linux/ArcheOS, it is better to do
the same operation in a Windows version and it will not crash. I tried
only once and Meshlab crashed on the 80% of the process. I will try some
more time, but i guess we can report this issue to the Meshlab team (we
can write to Matteo Dellepiane or Paolo Cignoni). Anyway i will wait
till i get some more results.
You are right, video cameras should gave you optimal data to work on
with SfM. Till now i never tried, but this would be a nice test to do.
It should speed up data acquisition (but maybe slow down data elaboration).
For the skull i used a black background to do PMVS2 elaboration faster
and this trick worked pretty good (it also gave me a more clean model at
the end of the process).
On 20/03/11 13:02, Ricardo Gaidão wrote:
> The skull point cloud is very detailed.
> In some cases, like model section profiles or spacial mapping, osm-bundler package results are good enough to be used without the need of interpolation/mesh creation.
> HD video cameras can also be used to create good point clouds in a fast way. To do this, each video file must be converted to individual photo frame images, necessary to osm-bundler processing.
> I think some software, like vlc or mplayer, can facilitate the process, exporting *.avi to *.jpg with regular intervals (i.e. export only frame images with one or two second intervals).
> HD video work better with objects that require a larger number of images for osm-bundler processing, like single artifacts (i.e. pottery), rock art or epigraphy.
> Mailing list info: http://lists.linux.it/listinfo/archeos-dev
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