Scanning Mermaids

Problems, solutions and discussion about scanning with a video projector and stripe patterns.

Scanning Mermaids

Postby MagWeb » Tue Mar 01, 2011 1:12 am

Hi,

here are first results of a new setup project I´m developing with Godehardt for medical research.

The task is to scan small medical stuff in formaldehyd. The final object will be only about 15mm, swimming and only fixed to the top. So the basin cann´t be put on the turntable and has to stay stationary (to avoid streaming of the liquid) while the cam/projector combo orbits around.
The next problem will be the subsurface scattering of the organic material. So I decided to try the SL way before going to try a microline laser. I had good results using the UofK SL scanner on similar stuff, but IMO its calibration is rather trcky and not as robust as DAVID ´s is.

For test purposes I used a plastic torso of 27mm. I fixed it with some putty (the waves in it are my fingerprints).
The cam is besides the projector and twisted 90° around its viewing axis, for its projected stripes are vertical on a horizontal oriented corner to calibrate and reference the scans.
This twisting was necessary because of the upper water surface and the bottom of the basin. With a normally oriented setup I got problems with the depth of the basin and/or reflections on the surfaces....

Gunter
Attachments
Mermaidres.jpg
Mermaid.jpg
Wasserscan 010.jpg
MagWeb
Moderator
 
Posts: 2367
Joined: Wed Jul 18, 2007 8:48 pm

Re: Scanning Mermaids

Postby milz » Tue Mar 01, 2011 1:01 pm

hi

wooooowww -) the lines are your fingerprints ?
thats very good scan resolution. :roll:

mfg milz
--
Intel Q9550@3,8Ghz W7 64bit
Camera : USB CCD 1024x768@30fps VariFocal 4-16mm - Logitech 9000Pro
Laser : DealExtreme 5mv Focusable Red / LC532-5-3-F(16x65) Focusable Green
Adafruit Motor Shield - 1,8Deg Stepper - 250:1 gearbox
mooooom bathroom!!!!!!
User avatar
milz
 
Posts: 383
Joined: Wed Jul 15, 2009 12:24 pm
Location: Germany Cologne

Re: Scanning Mermaids

Postby L.J.P.S » Tue Mar 01, 2011 8:23 pm

hoo, holla Gunter this is great
do You know what this could give in posibilities ?
all those collections in universities (and musea) that could be evaluated and preserved in an other way
I hope You'l continue this study
may the "force" be with You
Luc
L.J.P.S
 
Posts: 39
Joined: Wed Mar 11, 2009 5:37 am
Location: Belgium

Re: Scanning Mermaids

Postby NextDesign » Wed Mar 02, 2011 6:47 pm

Hi Gunter. What SL scanner is this? U of K? Kentucky?

Looks good mate.
NextDesign
 
Posts: 28
Joined: Tue Apr 21, 2009 3:32 am

Re: Scanning Mermaids

Postby MagWeb » Wed Mar 02, 2011 7:13 pm

Hi NextDesign,

The result above was done with the current implementation of SL in DAVID.

Yes, I worked with the University of Kentucky SL Scanner of Mr Hassebrook and got nice results too. This supports only a few cams as the Pro9000 and not the one used above.

Gunter
MagWeb
Moderator
 
Posts: 2367
Joined: Wed Jul 18, 2007 8:48 pm

Re: Scanning Mermaids

Postby NextDesign » Thu Mar 03, 2011 4:32 am

That scanner's software isn't distributed is it?
NextDesign
 
Posts: 28
Joined: Tue Apr 21, 2009 3:32 am


Return to Structured Light Scanning

Who is online

Users browsing this forum: No registered users and 0 guests