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Author Topic: Face scanner - Prototype  (Read 39775 times)

fxpop

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Re: Face scanner - Prototype
« Reply #45 on: February 01, 2014, 07:45:57 AM »
Dear all,

I just wanted to share some updates on my lasts scans.. im working really hard to improve them

- Im implementing noise projection using 2 strobes on the next few weeks.
- I have to improve lighting
- Highpass is working nicely in some areas, but not on others. I heard infinite tried to contact disney research lab, are they willing to sell their mesoscopic algorithm ?

(raw scan from Agisoft, just applied texture bump)
- Anyways im quite happy!

Cheers!

Great scan!!

One question, sorry if it's been covered before, but does using  noise projection mean you won't get accurate color uv image of the scan and it will require hand painting for vleanup? how does all that work?

FoodMan

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Re: Face scanner - Prototype
« Reply #46 on: February 01, 2014, 11:07:01 AM »
wowo great scan, and almost noisefree.. !  8)

Eildosa

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Re: Face scanner - Prototype
« Reply #47 on: February 01, 2014, 01:24:44 PM »
Quote
Hello exhale

Im using this equivalent to photoshops high pass filter http://registry.gimp.org/node/11742 it works a little bit better from my tests.

I?ve applied "two step" smoothing filter, however it doesnt work as i?d like to, details arent preserved in the way i wanted. I might have a custom made bilateral denoise filter on the upcoming months... im not counting on it though. - Im very supprissed to not be able to find any software that have this kind of filter for 3d mesh... not even polyworks.

- The problem now with high pass filter is that my lights are moving relative to the subject so dark / light information is nowhere near accurate. I will change this on the following weeks.

Do you mean that you take each photo individually and apply a high pass filter with the same parameters for each pictures?

Mfranquelo

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Re: Face scanner - Prototype
« Reply #48 on: February 02, 2014, 03:14:24 AM »
Using noise projections means that you separate the process into two. One for geometry processing and the other one for texture (without the pattern) this could, and usually leads to mismatches. I haven?t tried it yet because im trying to print in 35mm slide at the highest resolution i can.

Im aiming to reproduce 38 microns dots projected onto my subjects face. I'll use stochastic photolith because it tops the resolution of a lambda or inkjet printer for transparent slides.

Thank you FoodMan!

- I apply a highpass filter onto the image agisoft generates, when calculating texture projection onto the models geometry.

Mfranquelo

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Re: Face scanner - Prototype
« Reply #49 on: April 15, 2014, 02:28:35 PM »
My new Toy..., in development.  :)
(the structure will be simplified..) Actually on the photo, the scanners structure is attached to other structure which doesnt have anything to do with it, just for stability and testing purposes.

« Last Edit: April 15, 2014, 02:30:52 PM by Mfranquelo »

Marcel

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Re: Face scanner - Prototype
« Reply #50 on: April 15, 2014, 03:38:41 PM »
Wow, that looks amazing!

Where did you get that epic sphere? It's purpose is to give a more even lighting?

Mr_Curious

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Re: Face scanner - Prototype
« Reply #51 on: April 15, 2014, 03:41:21 PM »
Wow, that's really cool !!!   Great concept, love it.

Looking forward to seeing how you progress with this, awesome!

Cheers,

MC

Mfranquelo

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Re: Face scanner - Prototype
« Reply #52 on: April 15, 2014, 03:44:18 PM »
I casted it in resin from a routed polystyrene sphere ^^

Its has various purposes, one is to "psychologically" protect the scanned people from the fast movement of the semi circle, another one is to serve as an object to attach the custom made flashes, and the other one is to serve as a light bouncer.


FoodMan

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Re: Face scanner - Prototype
« Reply #53 on: April 15, 2014, 03:52:44 PM »
great device.. can't wait to see some scans  8) 8)

f/

btw how fast to do a full shot..?

Mfranquelo

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Re: Face scanner - Prototype
« Reply #54 on: April 15, 2014, 04:23:38 PM »
Thank you for your kind responses people!

- It takes 2.2 seconds for 48 images. (its limited to camera internal mechanics, thats why its 2.2 seconds)

Marcel

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Re: Face scanner - Prototype
« Reply #55 on: April 15, 2014, 04:57:19 PM »
I just noticed the giant stepper motor on the side XD

2.2 second for the whole scan? That is seriously fast! You don't need to add a small delay before taking the photos (to avoid camera shake)? I made a fast panorama robot a while back and I had to add 0.3 seconds delay before each shot to get rid of small wobble.


Mfranquelo

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Re: Face scanner - Prototype
« Reply #56 on: April 15, 2014, 05:01:27 PM »
Yeah its a big servomotor, lifting 15kg from the axis takes a serious amount of resources hehe. (there are smaller and lighter ways however, like a linear actuator... but i decided to do it simple for now.
Cameras are synced by flash so shake is not really a problem.  :)

Marcel

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Re: Face scanner - Prototype
« Reply #57 on: April 15, 2014, 05:57:36 PM »
When you are done, please make a small video of it in motion? I would love to see that!
Are you into building automation machines professionally?

Here is an older version of my panorama robot:

https://www.youtube.com/watch?v=SPgCeUcDdcs

The later version was much faster (it used timing belts instead of geared stepper motors, the geared versions had too much backlash)

What do you use to control the steppers? I would like to build an XY motion rig for a camera in the future. I have some stepper motors from Nanotec, but I was wondering if there was something easier.


Infinite

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Re: Face scanner - Prototype
« Reply #58 on: April 15, 2014, 06:22:58 PM »
Yeah its a big servomotor, lifting 15kg from the axis takes a serious amount of resources hehe. (there are smaller and lighter ways however, like a linear actuator... but i decided to do it simple for now.
Cameras are synced by flash so shake is not really a problem.  :)

Is it a time machine ! ?  :o

Would love to see this in motion. Very interesting concept  :)
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mala

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Re: Face scanner - Prototype
« Reply #59 on: April 15, 2014, 06:44:32 PM »
That's one crazy looking machine!
I would love to see a video of it working scanning someone too.