Hi all,
I am quite new to photogrammetry and geometric morphometric worlds and I got a
bit stocked.
I am trying to build 3D models of insectivorous bat skulls employing
photogrammetry (more details at the end) and Agisoft Photoscan software.
The methodology works quite well with bigger specimens (19 mm x 12 mm x 7 mm).
But with a smaller ones (e.g. 13 x 8 x 5 mm) the software has different
problems in the 3D reconstruction: usually it is not able to reconstruct the
dense cloud (doing “inside out” or providing a long scratch of points) or, if
the first step had worked successfully, it isn’t able to align the 3 chunks
together.
The pictures are in focus and the specimens in the picture results big enough I
would say.
We are trying with other software different from Agisoft but the reconstruction
is still difficult.
Anyone of you have already tried to perform photogrammetry on such small
objects?
Do you have any suggestions or comments?
Many thanks
Giada
Photogrammetry equipment and camera settings:
Camera: NIKON D5300 (24 megapixel)
Lens: NIKON macro 60 mm, f2.8
Settings:
4-5 cm from the specimen
100 ISO
f/32
0.5 sec exposure time
No flash. 3 white lights
Focus: automatic focus on a manual selected square
--
MORPHMET may be accessed via its webpage at http://www.morphometrics.org
---
You received this message because you are subscribed to the Google Groups
"MORPHMET" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
