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Honor Student
Posts: 3
Member Since: ‎02-10-2017
Message 1 of 15 (1,985 Views)

Calibration Fails

Product Name: David 3D Scanner 2.0
Operating System: Microsoft Windows XP (64-bit)

Recently installed and set up the David SLS-2 3D scanner. Software is Pro v5.0.7.

We can not get it to calibrate.

Our error is:

"Projection calibration failed, could not find a valid mapping between measured points and model parameters"

 

 

Sine waves fit between the blue lines; 6 major reference circles are visible.

Exposure under camera control is not red.

Looked through the setup documentation.

We're going insane.

 

Thanks in advance.

0 Kudos
Honor Student
Posts: 3
Member Since: ‎02-10-2017
Message 2 of 15 (1,962 Views)

Re: Calibration Fails

DAVID SLS-2 with DAVID5, The SKU is 911005-001

Grad Student
Posts: 317
Member Since: ‎10-31-2016
Message 3 of 15 (1,935 Views)

Re: Calibration Fails

Are you trying to calibrate 1 cam or 2 cam system?

I am an HP Employee

Original David Team Member
Honor Student
Posts: 3
Member Since: ‎02-10-2017
Message 4 of 15 (1,920 Views)

Re: Calibration Fails

1 camera
Grad Student
Posts: 317
Member Since: ‎10-31-2016
Message 5 of 15 (1,897 Views)

Re: Calibration Fails

Can you post any screenshot ?

I am an HP Employee

Original David Team Member
Top Student
Posts: 6
Member Since: ‎02-14-2017
Message 6 of 15 (1,848 Views)

Re: Calibration Fails

Setup_3.JPGFail_3.JPGIMG_1221.JPG

Grad Student
Posts: 317
Member Since: ‎10-31-2016
Message 7 of 15 (1,823 Views)

Re: Calibration Fails

Your setup looks OK. I do not have too much expirience with the DAVID 5 and SLS-2. What would I suggest is that you rotate the calibration panel towards projector (for 5 to 10 degrees) and recalibrate, if it´s not working then rotate more (5 to 10 degrees). Try to rotate in both directions (towards projector and towards cam) until you find right position.

I am an HP Employee

Original David Team Member
Intern
Posts: 49
Member Since: ‎11-04-2016
Message 8 of 15 (1,814 Views)

Re: Calibration Fails

Just a thought:

 

Make sure the speed of acquisition is correct and not too fast.

 

Advanced settings -> Acquisition -> 

 

make sure Maxpatternholdingtime is high to begin with. Default is 1000-

 

If David is unable to capture correctly the images, there is no warning except the failed calibration.

 

Are you able to calibrate with David 4 ?

 

Jeff

Top Student
Posts: 6
Member Since: ‎02-14-2017
Message 9 of 15 (1,765 Views)

Re: Calibration Fails

I tried all of the suggestions and a few combinations of them without success.

  • Maxpatternholdingtime increased from 1000 to 1100
  • David 4 successfully showed the green x marks (not able to obtain in David 5)
  • Rotating the calibration panel towards the projector and then toward the camera, trying to calbrate after each rotation
Intern
Posts: 49
Member Since: ‎11-04-2016
Message 10 of 15 (1,722 Views)

Re: Calibration Fails

Let's keep trying:

 

 

1) In Advanced settings, unselect:

 

Calibration -> OptimizeMultiCameracalibration

 

2) Place the central vertical line of the calibration panel in the center of the camera view.

 

Is this a positive calibration panel ?

 

Jeff

 

 

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