First Try... Introducing my head.

Questions, problems, comments and tips regarding the 3d scanning process.

First Try... Introducing my head.

Postby Ben4096 » Tue Sep 29, 2009 1:35 am

Hi there,
First thanks to Sven and Simon for their effort in making 3d scanning affordable for everyone.
After trying the usual things (shoes & statues), this is my first attempt in scanning (my) head.
I'm using a green focusable laser from the David shop, stuck on a kitchen timer.
It's not ideal since it take at least 2mn for a scan (and I can't take my breath for more than 1mn)
Camera is a DSLR Pentax K7. Lot of noise since it's impossible to set ISO (automatic). Post processing videos with after effect I can get a real thin line on perfect black background. but it take time... and was not the case for this scan.
Some scan at 640x480 and other at 1280x720.
For now my rig is not good enought fot Hi-Res and better besults come with low Res.
Capture d’écran 2009-09-23 à 02.43.39.jpg

There are a lot of scan merged for this one (a least 8 ). About one hour to make the scans / fusion / smothing waves in Zbrush.
With 15mn more I get a nice mesh using 3D-Coat (nice app, try it!)
Notice that I still have some issue with my clenaed mesh, and I need to better define loops to make it animable.
After that my next improvment will be to extract fine detail from Hi-Res picture to push subtle displacement on the model (skin pores & details).
Attachments
Capture d’écran 2009-09-29 à 03.01.22.jpg
http://paranoidpuppets.com/
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Re: First Try... Introducing my head.

Postby orchard1956 » Tue Sep 29, 2009 2:11 pm

Nice,
what is the application that you use to make the topographical lines on your head and face.

MK
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PC Q6600 4Gig Ram, 256 video, Logitech Pro 9000,Green 532-5-3-F Laser.
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Re: First Try... Introducing my head.

Postby RAYA » Tue Sep 29, 2009 2:50 pm

Hi Ben

Nice and Great Work

Do you used DAVID video grabber with DSLR Pentax K7 ?

Ray
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Re: First Try... Introducing my head.

Postby Ben4096 » Tue Sep 29, 2009 5:44 pm

Raya : Yes, Pentax k7 (40mm f/22) and video grabber.

Orchard : It's 3D-Coat with the retopology tools. Perfect for this kind of job and really easy to learn.
http://www.3d-coat.com/retopology.html
I think they have a demo version.
http://paranoidpuppets.com/
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Re: First Try... Introducing my head.

Postby MagWeb » Wed Sep 30, 2009 11:57 pm

Hi Ben,

wow- first time? - first kiss ?

did you join several scans of the face -done one after the other ---- or did you use the mirror technic to get the side aspects?

I like such "newbies" -- Add your power to DAVID

Gunter
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Re: First Try... Introducing my head.

Postby Ben4096 » Thu Oct 01, 2009 1:27 pm

Hi Gunter,

Yes, there're a lot of scans joined (8 or maybe more).
You would be terrified to see how much basic is my setup... :)
Calib corner is just put (not fixed) on the back rest of the sofa.
My process is : Record my calib patern, then I turn on laser, kitchen timer, video recording. I close my eyes, and try to take place in the sofa without moving anything.
Stop breathing, counting up to 180 in my head, get up (still closed eyes), and turn off everyting. Usully at this step I record an other calib patern in case something has moved when I sit down or get up.
Of course proceding like this it's just impossible to get a perfect focus on laser line nor video...
Also my raw scans are wavy because of : low angle, I breath, calib corner make of cardboard.

ben
http://paranoidpuppets.com/
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Re: First Try... Introducing my head.

Postby Ben4096 » Thu Oct 01, 2009 10:00 pm

An other try.
Much easier to scan someone else !
It's a quick a dirty one.
5 scans, trashed 1, fused 4
potof.jpg
http://paranoidpuppets.com/
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Re: First Try... Introducing my head.

Postby Ben4096 » Thu Oct 15, 2009 8:04 pm

With high res video (1536x1024), quite good angle and an overall better rig, I've improve results.
7 scans (videos) in 10 mn + 1h for processing videos, fusion and postwork in Zbrush (smooth brush + inflat brush to remove waves).
Attachments
image004.jpg
http://paranoidpuppets.com/
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Re: First Try... Introducing my head.

Postby Kirch » Tue Oct 20, 2009 10:43 pm

What luck! I just started looking into scannning yesterday and was wondering if what I have on hand would work. I have a pretty good dslr wih video and want to get stuff into zbrush. It looks like you have it figured. I'd just need a good laser and the software.

I saw the 3d coat software you refer to. Is this how you get the triangles to quads for use in zbrush?
Tres Cool!
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Re: First Try... Introducing my head.

Postby Ben4096 » Tue Oct 20, 2009 11:08 pm

Hi,
Yes, I use 3dcoat to draw a new clean topology (full quad) on scans.
Nice trick is to use same topo for each face, so you can morph differents heads :) !
3dcoat is not the only tool of his kind, topogun or even 3dmax10 cand do the job.
I have now improve my results and if people that I have scanned agreed I will post new picture soon.
Using dslr I have found a few tricks that are usefull, but it could depend on your specif dslr. If you need advice, just ask.

ben.
http://paranoidpuppets.com/
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Re: First Try... Introducing my head.

Postby Kirch » Wed Oct 21, 2009 1:05 am

I have a canon 5d mark11. Was just trying to hook it up with the demo to see if they get along and they seem to be ignoring each other at the moment.
I get the video in the canon software on the screen but haven't figured out how to get it further than that.
Karl
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Re: First Try... Introducing my head.

Postby Kirch » Wed Oct 21, 2009 1:08 am

I get it...I'll need to import the video in- This doesn't happen in real time....YET! :D
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Re: First Try... Introducing my head.

Postby Ben4096 » Wed Oct 21, 2009 1:36 pm

A new one, and my best one :)
I have fix my main problem, suject breath so scans are wavy.
So I wanted to share my solution : Put your subject on a freezer, time depend on his weight, but 2 days would fine in most case. :shock:
Just kidding.
A fixed and solid background is my solution. The model can rest on it, shoulder and head.
As you can see on picture, at least for front views it's really clean, no waves (exept on body wich is normal). And smooth average is only "1" !
Still have some issus with hair, but I have something to try and I'm pretty confident I will get someting acceptable soon.
IS-david.JPG

IS-Zbrush.JPG
http://paranoidpuppets.com/
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Re: First Try... Introducing my head.

Postby MagWeb » Wed Oct 21, 2009 2:28 pm

Hi,

another technic would be plastination 8)

Nice results!

Did you already notice the mirror technic?
I used it for my headscans

Gunter
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Re: First Try... Introducing my head.

Postby Ben4096 » Wed Oct 21, 2009 3:59 pm

Yes, I have seen it before and I'm really interrested by this technic.
But as I said my model rest on my background panel during scan and that's the best (easier) way I found to prevent moves.
With mirror technic I sould find another way to stabilize my model...
I'm thinking about something...
http://paranoidpuppets.com/
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