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Eyewear scan suggestions

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

Eyewear scan suggestions

Postby davide445 » Thu Mar 03, 2016 1:31 pm

First scan using SLS3, the customer asked for eyewear reverse engineering.

Attached the first shape alignment result using 8 different scans. This push me to some questions

- Need I to complete a 360° scan to fill the holes? Right now was just a 180° scan.
- Some scans appear to be a bit misaligned, especially going away from the center, need I to consider scanning it in parts?
- Tiny details are loosed, need I also to scan it separately?
- Using markers will improve the general accuracy? Need I to put some texture marker on the object itself or some external marker will be better?
Attachments
Eyewear scan 1.jpg
davide445
 
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Re: Eyewear scan suggestions

Postby drndadoo » Fri Mar 04, 2016 12:17 pm

Hi davide445,

can you check the keystone settings in the projector menu under Image > Autokeystone, it should be off and Manual keystone should be 0.
drndadoo
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Re: Eyewear scan suggestions

Postby Jokeri » Sat Mar 05, 2016 9:18 am

Hello davide445

can you scan your calibration panels after calibration and share the scan file?
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Re: Eyewear scan suggestions

Postby davide445 » Fri Apr 08, 2016 9:14 am

Apologize not answering since long time, but did understand starting with such a difficult part was a nonsense, and I was busy experimenting with more organic forms and RE software.

Now returning on the specific topic I started with the bow, scanning, scanning with a marker, using the spray, cleaning, again spray, scanning again.

I did find two problems after border shrinking and smoothing: after the cleaning and second spray application in the scan I did find some vertical bands that wasn't there before, also in the extreme part there are some noisy elements.

Attached detail images of the problem and if you want next the 18MB david file of the mesh, interested to know if it's better trying to clean the mesh on some program such as Mesh Mixer, or since I did need to RE the part to clean it directly into CAD sw (Rhino or SpaceClaim, will have a try also with CATIA) as parametric surface or border primitive.

https://drive.google.com/file/d/0BxbefK ... sp=sharing
Attachments
Bow 1.png
Bow 2.png
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Re: Eyewear scan suggestions

Postby micr0 » Fri Apr 08, 2016 9:18 pm

Can you post a picture of your set up as you have it to scan this part?

I have a few ideas that could help.
µ
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Re: Eyewear scan suggestions

Postby hunkatibor2 » Fri Apr 08, 2016 9:28 pm

Intel Xeon E5410 2.33GHZ 16GB RAM Windows 7 64bit David 4.5.0
2 Basler A622F camera 2 Tamron Asfirical AF 28-80mm lense
LG DLP Projector PF1500G Canon D40 Tokina 17-70mm 1:2.8-4,5
Humanti Calibration panel system and Alignmed&Two camera
hunkatibor2
 
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Re: Eyewear scan suggestions

Postby hunkatibor2 » Sat Apr 09, 2016 6:40 am

Intel Xeon E5410 2.33GHZ 16GB RAM Windows 7 64bit David 4.5.0
2 Basler A622F camera 2 Tamron Asfirical AF 28-80mm lense
LG DLP Projector PF1500G Canon D40 Tokina 17-70mm 1:2.8-4,5
Humanti Calibration panel system and Alignmed&Two camera
hunkatibor2
 
Posts: 1408
Joined: Tue Mar 16, 2010 4:26 pm
Location: Hungary

Re: Eyewear scan suggestions

Postby davide445 » Sat Apr 09, 2016 9:53 am

micr0 wrote:Can you post a picture of your set up as you have it to scan this part?

I have a few ideas that could help.

Will publish it possibly this afternoon.
davide445
 
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Re: Eyewear scan suggestions

Postby davide445 » Sat Apr 09, 2016 10:03 am

hunkatibor2 wrote:HI
https://sketchfab.com/models/1fd0160654 ... a77a65537f
You can not do better.
Tibor :oops: :(

Nice and in fact I did already tried to do better, with partial results.
What do you use for your work?
Me using a free tool I did discovered since a short time, with really powerful tools for mesh cleaning, fast, with coherent interface and professional documentation (meaning: the opposite of MeshMixer): http://www.gom.com/3d-software/gom-inspect.html.
Also did you have suggestions for the workflow: rescan, fix the mesh, or RE it.
Attachments
Bow david.jpg
davide445
 
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Re: Eyewear scan suggestions

Postby hunkatibor2 » Sat Apr 09, 2016 1:31 pm

Hi
I tried your link. I use now
http://www.meshmixer.com/download.html
Tibor
Intel Xeon E5410 2.33GHZ 16GB RAM Windows 7 64bit David 4.5.0
2 Basler A622F camera 2 Tamron Asfirical AF 28-80mm lense
LG DLP Projector PF1500G Canon D40 Tokina 17-70mm 1:2.8-4,5
Humanti Calibration panel system and Alignmed&Two camera
hunkatibor2
 
Posts: 1408
Joined: Tue Mar 16, 2010 4:26 pm
Location: Hungary

Re: Eyewear scan suggestions

Postby davide445 » Sat Apr 09, 2016 9:12 pm

hunkatibor2 wrote:Hi
I tried your link. I use now
http://www.meshmixer.com/download.html
Tibor

Probably it needs time to master MeshMixer, I did find it too difficult and incoherent in term of UX.
Not to start a fanboy discussion anyway, everyone did use what it's best for him.
davide445
 
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Re: Eyewear scan suggestions

Postby hunkatibor2 » Fri Apr 29, 2016 6:18 pm

Hi davide
I installed the GOM. It is very good to learn to use. Select bit problematic for me. This is because I can not move.
Tibor :cry:
Intel Xeon E5410 2.33GHZ 16GB RAM Windows 7 64bit David 4.5.0
2 Basler A622F camera 2 Tamron Asfirical AF 28-80mm lense
LG DLP Projector PF1500G Canon D40 Tokina 17-70mm 1:2.8-4,5
Humanti Calibration panel system and Alignmed&Two camera
hunkatibor2
 
Posts: 1408
Joined: Tue Mar 16, 2010 4:26 pm
Location: Hungary


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