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DAVID-Laserscanner Forum • View topic - calibration panel with more points
Dear DAVID Community,

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calibration panel with more points

The place for questions, problems, comments and tips regarding the camera calibration.

calibration panel with more points

Postby volume » Mon Oct 18, 2010 10:10 pm

Sorry for my ignorance.
I've seen in a post that another calibration panel other than that I know, is one with more points and that the center has large dots, can someone explain whether this panel is better than the last? or what differences exist between the two?
volume
 
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Re: calibration panel with more points

Postby WalterMo » Tue Oct 19, 2010 10:23 am

Here you can read about the main improvement of the new calibration panel:
viewtopic.php?f=7&t=1689

But you can still use the old one, DAVID will automatically detect what you are using.

Regarding the scale lenght which must be told to DAVID:
In both cases they are printed on the sheets, but if you measure it from point to point, take care:

At the old: Scale lenght = distance from the centre of one point to the next.
New sheets: = distance over 4 points.
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Re: calibration panel with more points

Postby MiRu » Wed Oct 20, 2010 2:02 pm

Hi guys, just new in here.

Can I work with V3 pattern with old david 2.4...?
MiRu
 
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Re: calibration panel with more points

Postby Khalid Khattak » Wed Oct 20, 2010 2:24 pm

Why Old David?
Just download the latest version and play with V3 highly efficient calibration panel.. I don't think the old 2.4 support V3, if yes you have to update the David Software to remove some bugs and improvement in V3.
PC: Dell Inspiron i3, 2.27GHz,4GB RAM,64 bit windows 7
CAMERA:
David CCD Mono USB
LASER:
David 5mW Green line laser
PROJECTOR:
3D LED Mini Projector 250lumens, Native 1024x600
[b]http://free3dscans.blogspot.com/
Khalid Khattak
 
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Re: calibration panel with more points

Postby MiRu » Fri Nov 05, 2010 4:54 pm

Thanks. Maybe change two files..?
MiRu
 
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Re: calibration panel with more points

Postby Xin » Fri Feb 18, 2011 11:21 am

Hi everyone,
If I have a big enough panel to put more than 70 points on it, will I get a more accurate scan?
Well, more points and small scales, is it possible?
Xin
 
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Re: calibration panel with more points

Postby milz » Fri Feb 18, 2011 2:17 pm

Xeon x5650@4ghz
Cam : USB2 CCD 1024x768 / USB3 1280x900
Laser : LC532-5-3-F(16x65) Focusable Green
Projector Acer X110P / Acer K132
dControl one David control box + Turntable + automatic texture lights
mooooom bathroom!!!!!!
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Re: calibration panel with more points

Postby Xin » Sat Feb 19, 2011 4:23 pm

Xin
 
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Re: calibration panel with more points

Postby milz » Sun Feb 20, 2011 2:55 pm

hi

the differnce is the near of the camera lens to the object.
if you use smaller panels you can set the camera near to
object. or if you have a vari focal lense you can easy adjust
the panel fitting by focus.

mfg milz
Xeon x5650@4ghz
Cam : USB2 CCD 1024x768 / USB3 1280x900
Laser : LC532-5-3-F(16x65) Focusable Green
Projector Acer X110P / Acer K132
dControl one David control box + Turntable + automatic texture lights
mooooom bathroom!!!!!!
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milz
 
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Re: calibration panel with more points

Postby Xin » Mon Feb 21, 2011 8:20 am

Xin
 
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