3D scanning thread

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CarterTG
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3D scanning thread

Post#1 » Fri Mar 08, 2013 9:27 pm

There's been some added activity recently, so perhaps it makes sense to share a discussion about 3D scanners. So far everything seems to be a variation of the static desktop variety -- object placed on a turntable, laser line projected at subject, and a camera to read the contour.

I can see two groups of users desperately wanting 3D scanning technology: model makers and (surprise!) jewelers.

For the first group, being able to scan a face (or entire head) would provide a tremendous shortcut versus reference-based modeling or digital sculpting. Desktop turntable scanners don't seem quite suited for this task. Plus, if this were deployed on a routine basis I'd be a bit concerned about a client disregarding the precautions and get zapped in the retina with the laser. Can't something else less harmful be projected? Perhaps a slightly less harmful UV beam?

For jewelers, the tech would be cleverly used to scan a fancy-cut stone to directly build structures around it. This would especially be a boon toward custom mountings for baroque pearls or ever-uniquely-shaped opals. I haven't looked up typical scanning resolutions of the homebrew stuff, but if it can't get into the hundredths of a millimeter, we might as well revert to just scanning the rough shape on a flatbed scanner. The other concern would be problems from the scanning laser just shooting through clear and tinted stones. Clients might not take kindly to their 10 carat heirloom getting dipped in watercolor ink for a proper scan.

Enough wondering out-loud. Onto some current candidates:

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CarterTG
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3D scanning thread

Post#2 » Fri Mar 08, 2013 9:29 pm

The NextEngine scanner.

http://www.nextengine.com/

Fixed frontal scan. $3k pricetag?

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Post#3 » Fri Mar 08, 2013 9:33 pm

Moedls smartphone scanner

http://www.engadget.com/2013/02/22/insert-coin-semifinalist-moedls/

$300ish?

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Post#4 » Fri Mar 08, 2013 9:36 pm

Makerbot Digitizer Desktop 3D Scanner

http://www.engadget.com/2013/03/08/makerbot-3d-scanner/

Price? TBA

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Post#5 » Fri Mar 08, 2013 10:09 pm

Or here the low-cost DAVID Laserscanner:
http://www.david-laserscanner.com/

For the light source you can use a tilted line laser or a 'normal' video projector. Latter is much faster.
A single scan from one direction needs about 5 seconds or less. Grabbing of the texture is simply possible. The camera can be a webcam.
Output file formats are OBJ, STL and PLY.

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Post#6 » Fri Mar 08, 2013 10:13 pm

We are lucky enough to have one of the leading gentlemen in home brew scanning submitting information to this very website (though I'm sure he will over modestly say he isn't that good)
Perhaps he may pass some information and results to you regarding David scanner and the newer tech David structured light scanning (no laser involved so safer for human modelling).

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Post#7 » Sat Mar 09, 2013 1:12 am

i think he just did. Also white light scanners can be used. David scanner can do white light as well which may answer your questions about lasers and eye safety. I believe that laser would be better for smaller jewelery scanner. There is no scanner that is perfect for every job imho.

Artec sells a micro handheld scanner at about 19000 that can scan small objects and faces by holding the scanner in your hand and sweeping it around an object like a spray can.

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Post#8 » Sat Mar 09, 2013 4:13 am

Since David came up in 2011 with its structured light scan possibility nearly all scans are now made in this way with a projector. Even scans of a coin like this:
http://www.david-laserscanner.com/forum/download/file.php?id=5788&mode=view

Regarding safety: An illumination of our eyes from a nearby standing projector like the Vivitek D535 can harm the retina in the same way as a 5mW line laser.

By the way, the just mentioned projector can be used for David scanning: The high light intensity can be decreased by a slider in the scan software and the modified lens barrel enables a close up focusing.

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Post#9 » Sun Mar 10, 2013 11:37 pm

I'm currently in active phase of experiments with cheap 3D scanning. Firstly I used Kinect, and now switched to photogrammetry technique. Kinect makes more acurate scan with everything in place, but kind of not enough detailed. For Kinect I'm using ReconstructMe - it's most adequate sollution in the market, and can be used for free. Also "ScanBoth" automation scripts makes life much easier (http://jherrman.com/2012/10/introducing-scanbooth/).

Here is attached image of scan of my brother.
Image

Also I tried glasses mod (http://reconstructme.net/2012/03/26/reconstructme-with-glasses/) for myself. It gives way more detailed result, but adds some kind of distortion and very hard to make 360 degree scan. I think it's maximum which can be achieved using Kinect sensor.
Image

Have big hopes that ReconstructMe team will find a way to implement scanning with Leap Motion (https://www.leapmotion.com/) coz it have 10 micron resolution! 0_o wow. Already orderd two pcs :) They said it should be possible and they have been chosen for Leap Developer program.

For now (until my pre-ordered Leap will be mailed in mid-May) I switched to photogrammetry. Here is first results made with Nikon D40 (6 Mpix) camera. Here is "Statue" of three ordinary clothes pins and there is plenty of room to be improved.
Image

Photos can be uploaded to these free services:
http://www.123dapp.com/catch
http://my3dscanner.com/
http://homes.esat.kuleuven.be/~visit3d/webservice/v3/index.php
http://www.phov.eu/
http://www.cubify.com/products/capture/

But only Autodesk's 123D worked well and in timely manner (few hours). "my3dscanner.com" also worked good, but it is way more demanding on quality of photos and took 24-48 hours to process them.
Arc3d results was complete mess, but it made it in hour :) Cubify is still in beta and very glitchy - from 10 attempts to upload photos only one was successfull. PHOV service never bothered to process any of my uploaded photos.

Hope this will help somebody.
Image

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CarterTG
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Post#10 » Mon Mar 11, 2013 11:03 am

This was my exploration into photogrammetry via 123D Catch last year:

http://www.tsplines.com/forum/viewtopic.php?f=2&t=34813

As a free service, it's definitely impressive but not enough for my own needs.

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Post#11 » Mon Mar 11, 2013 6:24 pm

"By the way, the just mentioned projector can be used for David scanning: The high light intensity can be decreased by a slider in the scan software and the modified lens barrel enables a close up focusing."
Very cool idea.
Measure Twice, Cut Once.

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Post#12 » Thu Mar 14, 2013 5:43 am

Here is some news from Kinect-hack approach scanning. Actually not Kinect but kind of. It's new Primesense (the same company which stands behind this technology and from which Microsoft is buying it's Kinects, or at least license) sensor Carmine 1.09. Actually it is not new - it's still the same sensor BUT with new calibration - this time it's seeing range decreased from 0.8m-3.5m in original to 0.35m-1.4m in Carmine 1.09.

So (Ta-da-da) here is some photos of what like it can be (with glasses in front of it):

Image

Image

When I first saw this I nearly fell off my chair.


Here is original topic on Google groups:
https://groups.google.com/forum/#!topic/reconstructme/hLXVp8eYq2I
Image

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Post#13 » Thu Mar 14, 2013 9:21 am

Drool! Look at that! Alright...
Though up until now I thought it went price vs. quality...I think things are rapidly changing here too!
So let me get this straight...I saw a group at a conference discussing the Xbox and kinects amazing point cloud modeling techniques and here its been magnified with a simple pair of reading glasses? wha?...

So this along with ever more ready retopology tools and re-meshing functions like that found in Zbrush means we can have instant access to re-building almost anything or sculpting into them at will...
The day where scanning objects creates sculpt worthy geometry seems like its not too much too expect but until that day I dont mind doing a tad more work!

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Post#14 » Fri Mar 15, 2013 12:50 am

Yep, it was done using PrimeSense Carmine 1.09 sensor which can be bought from their site for 200 bucks plus shipping. and pair of +2.5 reading glasses just in front of it without any calibration. But guy who made this scan said it can be even improved if calibrated.

Also keep in mind that such a method requires very big computational resources. I'm stuck with my laptop with nVidia GT640M GPU. It gives me something like 4-6 fps in high resolution mode. For real time performance looks like you need only desktop with something like gtx 650 - gtx 660Ti.
I'm now thinking on upgrade for my old workstation and ordering this new sensor.
Image

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Post#15 » Fri Mar 15, 2013 3:00 pm

Hmmm, Yea...Im only leaning towards it. So would you say the Kinect is as accurate? Oddly enough I noticed they now sell a device which sits over the kinect to shorten its depth for smaller rooms.

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Post#16 » Fri Mar 15, 2013 7:47 pm

What they are selling is "zoom" lens which in fact is vice versa - widens the field of view to accommodate all the players in smaller room. So this is not for what to look definitely.

I've not tried this new sensor, but I'm pretty sure it really can do this.
Once again want to point your attention that it's not Kinect itself - it's same technology, but in kinda different "package" - Primesense Carmine 1.09. Kinect is exact copy of their original reference design - Carmine 1.08. Basically they all are the same, but in 1.09 there is just different calibration settings and possibly optics which is slightly closer to each other
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Post#17 » Tue Mar 26, 2013 3:51 pm

I'm hoping the Kinect 2 has a much better camera and can then do better at 3D scanning. I'll have to wait a bit to see though. Microsoft does seem to have put more effort into the Kinect software, so at least it seems hopeful.

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Post#18 » Sat Mar 30, 2013 12:21 am

Photon 3D Scanner

http://www.indiegogo.com/projects/photon-3d-scanner/

$344 - $393 pledge range (shipping excluded)

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CarterTG
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Post#19 » Wed Jul 31, 2013 12:26 pm

Fuel3D Handheld Scanner

http://kck.st/13ygzkR

$750 - $1090 pledge range
Campaign ends Sept 1.

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Post#20 » Wed Jul 31, 2013 9:17 pm

I just found it also, but... resolution is only 0.5 mm. That is almost what Carmine 1.09 is capable of the shelf, and with glasses mod it is even better. I'd said it's around 0.3-0.5 mm range. Also it is already have automatic stitching unlike their soft.
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